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Tüm alıştırma soruları

5215 soru

Tüm türler5,215Çoktan seçmeli2,665Çoklu seçim6Doğru / Yanlış260Sayısal512Eşleştirme930Sıralama396Boşluk doldurma397Kısa cevap49
Soru 4621Soru →

Hydraulic accumulators in military aircraft store pressurized fluid to dampen pressure surges and provide emergency power if primary engine-driven pumps fail. Most tactical aircraft use nitrogen-charged piston accumulators, where a floating piston physically separates hydraulic fluid from a pre-charged chamber of dry nitrogen gas. Because nitrogen is chemically inert and non-flammable, it eliminates the risk of diesel effect combustion under high-pressure compression. While hydraulic fluid volume varies with system demand, the mass of sealed nitrogen gas remains constant during normal operations. Routine maintenance inspections verify the accumulator's static pre-charge pressure using an external pressure gauge only when the hydraulic system is fully depressurized.

According to the passage, routine maintenance inspections verify the accumulator's static pre-charge pressure while the aircraft hydraulic system operates under full pressure.

Cevabı ve açıklamayı göster

Cevap: False

Cevap

False
The statement is false because the passage explicitly notes that maintenance personnel check the static pre-charge pressure only when the hydraulic system is completely depressurized, which contradicts the statement's assertion of testing under full pressure.

Adım Adım Çözüm

1
Scan the passage to locate the specific section discussing maintenance procedures and pre-charge pressure verification.
Located the final sentence describing how routine maintenance inspections check static pre-charge pressure.
Direct retrieval of the factual condition is required to evaluate the validity of the statement.
2
Compare the condition specified in the statement with the explicit condition stated in the passage.
The text states testing occurs 'only when the hydraulic system is fully depressurized,' directly contradicting the statement's claim that it occurs under 'full pressure.'
Identifying contradicted details confirms that the statement is factually unsupported by the text.

Anahtar Kavram

Negative detail identification requires verifying whether a stated condition is directly contradicted by or missing from the factual statements in the passage.
Tahmini Süre:1m 0s
Soru 4622Soru →

Read the following passage:

"The intercepted radio transmission from the advancing mechanized unit was frustratingly equivocal—deliberately ambiguous and open to multiple conflicting interpretations regarding their operational status. Because the communication provided no definitive tactical direction, the command center was forced to deploy reconnaissance drones across all potential approach vectors."

Based on the context clues provided in the passage, which of the following best defines the word equivocal?

Cevabı ve açıklamayı göster

Cevap: Deliberately ambiguous and subject to multiple interpretations

Cevap

Deliberately ambiguous and subject to multiple interpretations
The correct answer is directly stated in the passage. The author uses an em-dash to provide a synonymous context clue, immediately defining 'equivocal' as being 'deliberately ambiguous and open to multiple conflicting interpretations'.

Adım Adım Çözüm

1
Locate the target word 'equivocal' within the passage.
The word appears in the first sentence: '...was frustratingly equivocal—deliberately ambiguous...'
Finding the word in context is the first step to identifying any surrounding clues.
2
Analyze the punctuation and phrasing immediately following the target word.
The word is followed by an em-dash (—), which is often used by authors to introduce a definition, restatement, or clarification.
Punctuation marks like em-dashes or commas frequently signal the presence of a synonymous context clue.
3
Extract the descriptive phrase that follows the punctuation mark.
The phrase is 'deliberately ambiguous and open to multiple conflicting interpretations regarding their operational status.'
This phrase serves as the author's direct explanation of the unfamiliar vocabulary word.
4
Match the extracted meaning to the given options.
The extracted phrase perfectly matches the option stating the communication was deliberately ambiguous and subject to multiple interpretations.
Confirming the exact match ensures the selected answer relies purely on the text rather than outside assumptions or misleading word roots.

Anahtar Kavram

Identifying Synonymous Context Clues via Punctuation (Em-dash)
Tahmini Süre:1m 0s
Soru 4623Soru →

In large grain storage silos, dormant wheat naturally respires, producing minor amounts of metabolic heat and humidity. When internal grain temperature rises above 30°C, fungal activity accelerates, initiating a compounding heat cycle that destroys the grain. Facility managers utilize embedded sensor cables to track internal temperatures and engage ventilation fans exclusively when outdoor ambient air has lower temperature and humidity than the grain mass. Operating the ventilation fans during damp or warm atmospheric conditions draws external moisture into the silo, accelerating spoilage.

Based on the passage, which of the following conclusions is most logically supported?

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Cevap: Activating aeration fans to cool overheating grain can accelerate spoilage if ambient weather conditions are unfavorable.

Cevap

Activating aeration fans to cool overheating grain can accelerate spoilage if ambient weather conditions are unfavorable.
The passage explains that grain heating above 30°C requires cooling, but fan operation must occur only when outdoor air is cooler and drier than the grain mass. If fans are run during warm or damp conditions, external moisture is pulled in, accelerating spoilage. Therefore, it is logically concluded that attempting to cool the grain via aeration when outside weather is unfavorable will worsen spoilage instead of resolving it.

Adım Adım Çözüm

1
Analyze the conditions governing grain deterioration and cooling in the passage.
The text states that temperatures above 30°C accelerate fungal spoilage, but running fans during warm or damp weather draws moisture inside and hastens spoilage.
Understanding the interaction between internal heating and external air quality is necessary to evaluate the outcome of ventilation.
2
Synthesize the logical consequence of using aeration fans when ambient weather is unsuitable.
Even if grain is overheating and requires cooling, running fans when outside air is warm or damp will worsen spoilage rather than fix it.
Drawing a logical conclusion requires combining the need for cooling with the environmental limitation stated in the text.
3
Evaluate the choices to identify the supported deduction and eliminate unsupported claims.
The statement regarding the risk of worsening spoilage under unfavorable ambient conditions is strictly justified by the text.
Ensures the selected conclusion does not rely on verbatim traps, unsupported assumptions, or outside knowledge.

Anahtar Kavram

Drawing logical deductions by synthesizing stated constraints and causal relationships from a passage.
Tahmini Süre:1m 0s
Soru 4624Soru →

During the harrowing winter expeditions of the early Arctic survey corps, sled dogs proved far more dependable than motorized snow tractors. While mechanical engines frequently froze and suffered catastrophic cylinder fractures in subzero blizzards, the hardy Siberian huskies navigated treacherous ice shelves with instinctive grace and unwavering endurance. Their keen sensory awareness repeatedly steered survey teams away from concealed crevasses, ensuring the survival of entire expeditions. These extraordinary animals did not merely assist the explorers; their sheer resilience made polar mapping possible.

What is the author's tone toward the sled dogs in the passage?

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Cevap: Appreciative and admiring

Cevap

Appreciative and admiring
The author consistently employs strong positive diction, describing the sled dogs as having 'instinctive grace,' 'unwavering endurance,' and 'keen sensory awareness,' concluding that they were 'extraordinary animals' whose resilience ensured human survival. These choices establish a clearly appreciative and admiring attitude.

Adım Adım Çözüm

1
Locate words and descriptive phrases directly related to the sled dogs.
Identified terms such as 'hardy', 'instinctive grace', 'unwavering endurance', 'keen sensory awareness', 'extraordinary animals', and 'sheer resilience'.
Tone is revealed through the author's specific word choices and emotional connotations.
2
Evaluate the emotional connotation of the identified diction.
The diction is consistently positive, emphasizing respect, gratitude, and wonder at the animals' abilities.
Determining whether the descriptors are positive, negative, or neutral narrows down the author's attitude.
3
Select the descriptor that summarizes this positive attitude.
The author demonstrates an appreciative and admiring tone toward the dogs' essential role in Arctic survival.
The correct tone descriptor must match the positive perspective demonstrated throughout the passage.

Anahtar Kavram

Inferring Author Tone and Attitude
Tahmini Süre:45s
Soru 4625Soru →

Which of the following is the simplified form of the expression 4(2x−3)+5x4(2x - 3) + 5x?

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Cevap: 13x−1213x - 12

Cevap

13x−1213x - 12
The correct answer is obtained by first applying the distributive property to multiply 44 by both 2x2x and −3-3, yielding 8x−128x - 12. Then, the like terms 8x8x and 5x5x are combined to get 13x13x. The constant −12-12 cannot be combined with the variable terms, so the fully simplified expression is 13x−1213x - 12.

Adım Adım Çözüm

1
Distribute the 4 into the parentheses.
8x−12+5x8x - 12 + 5x
The distributive property requires multiplying the constant outside the parentheses by each term inside.
2
Group and combine the like terms.
13x−1213x - 12
The terms 8x8x and 5x5x are like terms and can be added together. The constant −12-12 cannot be combined with variable terms.

Anahtar Kavram

Simplifying Algebraic Expressions via Distribution and Combining Like Terms
Soru 4626Soru →

Commercial greenhouse heating systems frequently use unvented natural gas heaters to supply warmth and elevate carbon dioxide (CO2CO_2) concentrations to accelerate plant growth. However, incomplete combustion produces ethylene gas, which damages tomato and pepper blossoms at concentrations as low as 0.05 parts per million. Because ethylene damage appears identical to drought stress, growers monitoring only soil moisture often increase irrigation unnecessarily. Consequently, facility guidelines mandate installing infrared combustion monitors on all unvented heaters before introducing fruiting crops.

Based on the passage, which of the following conclusions is most logically supported?

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Cevap: Increasing irrigation will not resolve blossom damage caused by faulty heater combustion.

Cevap

Increasing irrigation will not resolve blossom damage caused by faulty heater combustion.
The text states that ethylene gas from incomplete combustion creates symptoms identical to drought stress, leading growers to add water unnecessarily. Because the true problem is toxic gas rather than a lack of water, increasing irrigation will not resolve the damage.

Adım Adım Çözüm

1
Identify the underlying cause of blossom damage from the passage.
Ethylene gas generated by incomplete combustion is the physical cause of blossom injury.
Isolating the root cause distinguishes the actual source of harm from its surface symptoms.
2
Evaluate the relationship between the observed symptoms and the corrective measure of irrigation.
Growers mistake ethylene damage for drought stress, but the plants are not suffering from water deficiency.
Understanding that the symptom is misleading shows why treating drought will not fix a gas-related issue.
3
Deduce the necessary logical conclusion.
Supplying extra water does not eliminate or resolve combustion-induced blossom damage.
A valid logical conclusion must follow strictly from the synthesized passage premises.

Anahtar Kavram

Drawing logical deductions from cause-and-effect relationships by differentiating root causes from deceptive symptoms.
Tahmini Süre:1m 0s
Soru 4627Soru →

Determine the final simplified value of the mathematical expression shown below:

−24−3[12−4(3−5)2] -2^4 - 3[12 - 4(3 - 5)^2]

Which of the following represents the correct result?

Cevabı ve açıklamayı göster

Cevap: -4

Cevap

The correct simplified value of the expression is -4.
The expression is accurately evaluated by following the standard order of operations. The innermost parentheses are solved to get -2, which is then squared to yield 4. Multiplying this by 4 inside the brackets gives 16, and subtracting this from 12 leaves -4 in the brackets. The leading exponent −24-2^4 is -16. Multiplying the bracket by -3 gives 12, and adding this to -16 yields a final result of -4.

Adım Adım Çözüm

1
Evaluate the expression inside the innermost parentheses: (3−5)(3 - 5).
(3−5)=−2(3 - 5) = -2
According to the order of operations (PEMDAS), parentheses must be resolved first.
2
Apply the exponents to the respective bases: (−2)2(-2)^2 and −24-2^4.
(−2)2=4(-2)^2 = 4 and −24=−16-2^4 = -16
Exponents are evaluated next. Note that −24-2^4 lacks parentheses around the negative sign, meaning it is interpreted as −(24)=−16-(2^4) = -16.
3
Substitute the exponent results back into the bracket and multiply: 4(4)4(4).
The bracket becomes [12−4(4)][12 - 4(4)], which simplifies to [12−16][12 - 16].
Inside the brackets, multiplication must be performed before subtraction.
4
Complete the subtraction inside the brackets: [12−16][12 - 16].
[12−16]=−4[12 - 16] = -4
Finish evaluating the operations grouped by the brackets.
5
Multiply the bracket's result by the coefficient outside: −3(−4)-3(-4).
−3×−4=12-3 \times -4 = 12
Multiplication is performed before the final addition/subtraction.
6
Combine the first term with the multiplication result: −16+12-16 + 12.
−16+12=−4-16 + 12 = -4
Addition and subtraction are the final steps in the order of operations.

Anahtar Kavram

Order of Operations (PEMDAS)
Tahmini Süre:45s
Soru 4628Soru →

Aviation maintenance technicians routinely inspect aircraft composite honeycomb sandwich panels for core moisture ingress. During high-altitude flight, ambient temperatures drop significantly, creating a pressure differential that can draw atmospheric moisture into minute micro-cracks in the outer skin. When the aircraft ascends and descends repeatedly through freezing and warm conditions, trapped water undergoes continuous freeze-thaw cycles. This expansion gradually separates the composite face sheets from the internal honeycomb core, severely weakening the structural stiffness of flight control surfaces even when the exterior skin appears undamaged.

Based on the passage, which of the following conclusions is most logically supported?

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Cevap: Internal delamination can compromise a control surface's load-bearing ability before visible outer flaws appear.

Cevap

Internal delamination can compromise a control surface's load-bearing ability before visible outer flaws appear.
The conclusion that internal delamination can compromise a control surface's load-bearing ability before visible outer flaws appear is directly supported by the passage, which explicitly connects internal core separation and stiffness loss to situations where the exterior skin remains visibly intact.

Adım Adım Çözüm

1
Analyze the passage for factual statements regarding structural degradation and visible external conditions.
Identified that moisture causes freeze-thaw cycles, separating internal face sheets from the core and weakening stiffness while the exterior appears undamaged.
Establishing the direct textual evidence is necessary before evaluating candidate deductions.
2
Evaluate each conclusion against the passage evidence to distinguish supported inferences from unwarranted assumptions.
The statement regarding internal structural compromise preceding visible outer damage paraphrases the passage accurately without adding external assertions.
A valid inference must follow logically from the provided text without relying on outside knowledge, causal reversals, or unjustified constraints.

Anahtar Kavram

Distinguishing Supported and Unsupported Inferences
Tahmini Süre:1m 5s
Soru 4629Soru →

Read the passage below:

"During the routine inspection of the hydraulic crane, the senior mechanic examined the high-pressure fluid lines for any occlusion, or blockage, that might hinder operating performance. Even a small obstruction within the precision valves can restrict oil flow and trigger sudden equipment breakdown."

Based on the synonymous context clue in the passage, which word directly defines the term "occlusion"?

Aşağıdaki boşlukları doldurun

In the passage, the synonymous context clue that directly defines "occlusion" is .
Cevabı ve açıklamayı göster

Cevap

blockage
In the passage, the author uses an appositive restatement clue signaled by the comma and coordinating conjunction ', or blockage,'. This syntactic structure explicitly clarifies that 'occlusion' means a 'blockage' in the fluid line.

Adım Adım Çözüm

1
Locate the target vocabulary word 'occlusion' in the first sentence of the passage.
Found the phrase: '...for any occlusion, or blockage, that might hinder...'
Identifying the target word's immediate surrounding sentence structure is necessary to spot adjacent context clues.
2
Identify the syntactic context clue connecting the target word to its definition.
The word 'occlusion' is directly followed by the clarifying appositive phrase ', or blockage,'.
The conjunction 'or' flanked by commas is a standard synonymous context clue signaling a direct definition or restatement.
3
Extract the synonymous word that completes the blank.
The word 'blockage' directly defines 'occlusion'.
The text explicitly equates 'occlusion' with 'blockage'.

Anahtar Kavram

Identifying Synonymous Context Clues
Tahmini Süre:45s
Soru 4630Soru →

Read the following technical passage:

During daily operation of shipboard centrifugal fuel oil purifiers, operators must monitor the operating water pressure to maintain the liquid seal. If the operating water pressure falls below 25 pounds per square inch (psi) during fuel separation, the sliding bowl bottom drops prematurely, discharging unprocessed fuel directly into the sludge collection tank. During initial startup flushes, the manual three-way operating valve must remain open for at least 15 seconds to verify full bowl closure before introducing raw fuel.

Based on the passage, a drop in operating water pressure below 25 psi during fuel separation causes the sliding bowl bottom to drop prematurely.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True
The passage explicitly confirms that when operating water pressure falls below 25 psi during separation, the sliding bowl bottom drops prematurely.

Adım Adım Çözüm

1
Identify the key condition and mechanical effect presented in the statement.
The target statement asserts that operating water pressure falling below 25 psi causes the sliding bowl bottom to drop prematurely.
Direct fact retrieval requires finding the exact sentence in the text addressing operating water pressure and its direct operational consequence.
2
Scan the passage for the specific pressure metric and verify the stated outcome.
The passage directly confirms: 'If the operating water pressure falls below 25 pounds per square inch (psi) during fuel separation, the sliding bowl bottom drops prematurely...'
Matching the explicit factual details verifies that the statement is directly supported by the text.

Anahtar Kavram

Direct Fact Retrieval from technical operational text
Tahmini Süre:1m 0s
Soru 4631Soru →

The two statements below demonstrate how a single technical term carries distinct definitions across engineering and biology. Which single polysemous word accurately completes both blanks?

Aşağıdaki boşlukları doldurun

1. Under heavy operational pressure, the aircraft wing spar experienced severe mechanical , resulting in measurable physical deformation.
2. Medical researchers analyzing the viral outbreak isolated a resilient that proved resistant to standard sanitization protocols.
Cevabı ve açıklamayı göster

Cevap

strain
The word 'strain' accurately satisfies both sentences: in structural engineering, 'mechanical strain' denotes the physical deformation of a component under load, while in microbiology, a 'strain' refers to a specific genetic variant or lineage of an infectious microorganism.

Adım Adım Çözüm

1
Analyze the mechanical and structural context of the first statement
Determine that the missing word refers to the physical deformation or elongation of a material resulting from applied force.
In mechanics and materials science, deformation caused by applied stress is specifically termed 'strain'.
2
Analyze the biological and medical context of the second statement
Determine that the missing word designates a specific genetic variant, subtype, or lineage of a microorganism.
In virology and microbiology, distinct genetic lineages of an infectious agent are classified as 'strains'.
3
Identify the polysemous word that satisfies both contextual requirements
The word 'strain' functions accurately in both structural physics and microbiological taxonomy.
A valid polysemous solution must be grammatically, semantically, and technically precise in both domains.

Anahtar Kavram

Analyzing polysemous vocabulary across technical and scientific disciplines
Tahmini Süre:1m 0s
Soru 4632Soru →

Determine the correct chronological sequence of steps required to evaluate the following mathematical expression according to the standard order of operations:

−3×[4−(5−23)]−7+4 \frac{ -3 \times \left[ 4 - \left( 5 - 2^3 \right) \right] }{ -7 + 4 }

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence begins with the innermost exponent, resolves the nested grouping symbols outward, simplifies the numerator and denominator independently, and finishes with division.
The correct evaluation sequence strictly follows the order of operations (PEMDAS). It begins by isolating the innermost grouping symbols and addressing the exponent. Once the innermost parentheses are reduced to a single value, the surrounding brackets are resolved, carefully tracking negative signs. The large fraction bar acts as an invisible grouping symbol, requiring the entire numerator and denominator to be independently simplified before performing the final division.

Adım Adım Çözüm

1
Identify innermost grouping symbols and evaluate exponents.
The expression (5−23)(5 - 2^3) becomes (5−8)(5 - 8).
Parentheses and Exponents have the highest priority in the order of operations.
2
Complete operations inside the innermost parentheses.
The expression (5−8)(5 - 8) evaluates to −3-3.
The innermost group must be resolved to a single number before moving outward to the next level of grouping.
3
Evaluate operations inside the outer square brackets.
The expression [4−(−3)][4 - (-3)] becomes [4+3][4 + 3], which simplifies to 77.
Square brackets function as the next level of grouping and must be completely simplified before multiplying.
4
Simplify the remainder of the numerator and the denominator.
The numerator becomes −3×7=−21-3 \times 7 = -21. The denominator becomes −7+4=−3-7 + 4 = -3.
A fraction bar acts as a grouping symbol, meaning the top and bottom expressions must be fully evaluated independently before division occurs.
5
Perform the final division.
−21÷−3=7-21 \div -3 = 7.
Division is the final operation combining the fully simplified numerator and denominator.

Anahtar Kavram

Order of Operations (PEMDAS) with nested grouping symbols, negative numbers, and fraction bars.
Soru 4633Soru →

A supply store reduces the price of a generator by 20%20\%. During a clearance sale, this discounted price is reduced by an additional 25%25\%. If the final clearance price is $360\$360, what was the original price of the generator?

Cevabı ve açıklamayı göster

Cevap: $600\$600

Cevap

The original price of the generator was $600\$600.
The problem involves successive percentages. The first discount leaves 80%80\% of the original price. The second discount removes 25%25\% of that 80%80\%, leaving 75%75\% of 80%80\%, which mathematically is 0.80×0.75=0.600.80 \times 0.75 = 0.60. This means the final price is exactly 60%60\% of the original price. Dividing the final price of $360\$360 by 0.600.60 yields the correct original price of $600\$600.

Adım Adım Çözüm

1
Represent the original price as a variable and apply the first discount.
If the original price is xx, the price after a 20%20\% discount is x−0.20x=0.80xx - 0.20x = 0.80x.
A 20%20\% reduction means the buyer pays 80%80\% of the original price.
2
Apply the second discount to the newly reduced price.
The clearance price is 0.80x−(0.25×0.80x)=0.80x×0.75=0.60x0.80x - (0.25 \times 0.80x) = 0.80x \times 0.75 = 0.60x.
Successive discounts are applied to the previously discounted price, not the original price. Taking 25%25\% off means keeping 75%75\% of the current value.
3
Set up the equation with the given final price and solve for xx.
0.60x=3600.60x = 360, so x=3600.60=600x = \frac{360}{0.60} = 600.
The final represented percentage (60%60\%) equals the final dollar amount ($360\$360), allowing us to isolate the original price.

Anahtar Kavram

Successive Percentage Decreases
Soru 4634Soru →

Read the following passage:

"Early attempts to use synthetic composite materials in airframe manufacturing faced widespread skepticism due to erratic curing times. However, modern polymer matrices have revolutionized aviation engineering. By delivering unprecedented tensile strength while slashing overall structural weight by forty percent, these advanced materials have undeniably elevated aerospace performance to remarkable new standards. Their integration represents a brilliant leap forward in aeronautical efficiency."

Statement: Based on the passage, the author's tone toward modern polymer matrices is enthusiastic and appreciative.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True
The statement is correct because the author employs intensely positive diction such as 'revolutionized,' 'unprecedented,' 'undeniably elevated,' and 'brilliant leap forward,' all of which convey unambiguous enthusiasm and appreciation for modern polymer matrices.

Adım Adım Çözüm

1
Analyze the specific descriptive words and phrasing used in relation to modern polymer matrices.
Identified phrases including 'revolutionized aviation engineering,' 'unprecedented tensile strength,' 'undeniably elevated,' and 'brilliant leap forward.'
An author's tone and attitude are determined primarily by diction and the emotional connotation of their chosen vocabulary.
2
Determine the overarching attitude conveyed by this diction.
The diction reflects strong approval, excitement, and admiration for the advancement.
Positive descriptors highlighting breakthroughs and superior performance signify an enthusiastic and appreciative stance rather than critical or detached reporting.
3
Evaluate the accuracy of the given statement against the identified tone.
The statement correctly classifies the tone as enthusiastic and appreciative.
Since the textual evidence directly supports this description, the statement is true.

Anahtar Kavram

Inferring Author Tone and Attitude through Diction
Tahmini Süre:45s
Soru 4635Soru →

A military recruit needs to correctly answer 75%75\% of the questions on a 60-question training exam to pass. How many questions must the recruit answer correctly?

Cevabı ve açıklamayı göster

Cevap: 45

Cevap

45
To find 75%75\% of 60, first convert the percentage to a decimal (0.750.75) or a fraction (34\frac{3}{4}). Then, multiply this value by the total number of questions (6060). Calculating 60×0.7560 \times 0.75 exactly yields 45.

Adım Adım Çözüm

1
Convert the required percentage to a decimal or fraction.
75%=0.7575\% = 0.75 or 34\frac{3}{4}
Percentages must be converted into their numerical equivalents before applying them in an arithmetic operation.
2
Multiply the total number of questions by the converted percentage.
60×0.75=4560 \times 0.75 = 45
To find a specific percentage of a total amount, multiply the total by the percentage rate.

Anahtar Kavram

Calculating the percentage of a given number
Soru 4636Soru →

Hydraulic braking systems in modern motor vehicles depend on glycol-ether fluid to transfer pedal force directly to the wheel calipers. Over time, however, brake fluid naturally absorbs moisture from the atmosphere through microscopic pores in flexible rubber hoses and reservoir seals. As moisture content increases, the fluid's boiling point drops significantly from its dry rating. Under prolonged or heavy braking, friction generates extreme heat that can boil water-contaminated fluid, creating pockets of compressible vapor inside the brake lines. Because gas compresses while liquid does not, this vapor formation causes a soft pedal feel and severe loss of stopping power. Consequently, routinely inspecting and replacing brake fluid is critical to prevent moisture-induced hydraulic failure.

Which of the following statements best expresses the main idea of the passage?

Cevabı ve açıklamayı göster

Cevap: Regularly servicing brake fluid is essential to maintain safe vehicle stopping power by preventing moisture-related hydraulic failure.

Cevap

Regularly servicing brake fluid is essential to maintain safe vehicle stopping power by preventing moisture-related hydraulic failure.
The correct response synthesizes the complete argument of the passage: it connects the cause (atmospheric moisture absorption), the hazard (boiling and loss of braking pressure), and the essential conclusion (routine fluid maintenance is required for safe operation).

Adım Adım Çözüm

1
Analyze the passage structure to identify the relationship between the supporting points and the final conclusion.
The text explains how atmospheric water enters brake lines, why this lowers the boiling point, and how boiling produces compressible gas that degrades braking performance, leading to the concluding necessity of regular replacement.
Distinguishing supporting technical mechanisms from the concluding takeaway reveals the author's primary purpose.
2
Evaluate the answer choices to differentiate isolated factual details from the overarching thesis.
Options mentioning microscopic hose pores or spongy pedal feel describe individual cause-and-effect links in the middle of the passage, while the statement emphasizing routine fluid replacement to maintain braking safety synthesizes the full scope of the text.
The main idea must encompass the entire passage rather than focus on a single piece of evidence or a narrow sub-point.

Anahtar Kavram

Distinguishing the central thesis from supporting factual details in technical expository text
Tahmini Süre:1m 0s
Soru 4637Soru →

Passage:
Before energizing heavy three-phase industrial motors that have remained idle in unheated storage facilities over the winter, technicians perform an insulation resistance check with a megohmmeter. If the reading falls below the standard operating threshold, the motor is not immediately condemned as defective. Instead, low-voltage heating blankets or internal space heaters are energized for forty-eight hours to evaporate dampness. Only after the unit has thoroughly dried out is the resistance test repeated to verify whether the windings are genuinely ruined.

Evaluate whether the following statement is True or False based on the passage:
Moisture accumulation can cause an idle motor to fail an initial insulation test even when its electrical windings remain structurally intact.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True
The passage explains that technicians apply heat to dry out an idle motor after a low reading and retest it before deciding if the windings are ruined. This sequence logically implies that dampness can produce an artificially low resistance measurement while the windings themselves remain salvageable and intact.

Adım Adım Çözüm

1
Analyze the procedure and conditions described in the passage.
Technicians test cold, idle motors and, upon finding low insulation resistance, apply heat for 48 hours to dry them out before retesting.
Understanding why technicians dry the motor instead of immediately discarding it reveals the author's underlying premise.
2
Deduce the unstated relationship between moisture and insulation readings.
Drying the motor before making a final judgment implies that moisture itself can temporarily suppress resistance values without the windings being permanently damaged.
Connecting the diagnostic sequence to the condition of the hardware confirms the validity of the statement.

Anahtar Kavram

Identifying Implied Meanings
Tahmini Süre:1m 0s
Soru 4638Soru →

What is the exact value of the following mathematical expression?

10−(−2)3+42 \frac{10 - (-2)}{3} + 4^2
Cevabı ve açıklamayı göster

Cevap: 20

Cevap

The correct value is 20.
The expression is correctly evaluated by first simplifying the numerator grouping 10−(−2)10 - (-2) to get 1212, dividing by 33 to obtain 44, evaluating the exponent 424^2 to get 1616, and finally adding the results together to reach 2020.

Adım Adım Çözüm

1
Simplify the grouping symbol formed by the numerator.
10−(−2)=1210 - (-2) = 12
The numerator of a fraction acts as a grouping symbol and must be evaluated first.
2
Divide the simplified numerator by the denominator.
123=4\frac{12}{3} = 4
The fraction bar represents division, which should be completed before addition.
3
Evaluate the exponent.
42=164^2 = 16
According to the order of operations, exponents must be evaluated before addition.
4
Add the remaining values.
4+16=204 + 16 = 20
Addition is the final operation left in the expression.

Anahtar Kavram

Order of Operations with fractions and signed numbers
Tahmini Süre:45s
Soru 4639Soru →

Sound-powered telephone systems provide critical emergency communication aboard naval vessels without relying on external electrical power. When a user speaks into the transmitter, acoustic sound waves vibrate a flexible diaphragm linked directly to a magnetic armature, generating weak electrical currents through electromagnetic induction. These self-generated electrical signals travel along dedicated, shielded two-wire circuits to the receivers of connected handsets. Because the system produces its own operating energy directly from voice vibrations, communication remains active even during complete shipboard electrical blackout. However, operational range is strictly limited compared to amplified networks, and having multiple talkers on the same circuit simultaneously diminishes audio clarity due to signal division.

According to the passage, which of the following is NOT true regarding sound-powered telephone systems?

Cevabı ve açıklamayı göster

Cevap: They rely on auxiliary emergency batteries to sustain communication during a power blackout.

Cevap

Sound-powered telephone systems rely on auxiliary emergency batteries to sustain communication during a power blackout.
The passage explicitly states that sound-powered telephones function without external power and generate their own operating energy directly from the user's voice vibrations. Claiming that the system relies on auxiliary emergency batteries directly contradicts the text, making it the statement that is NOT true.

Adım Adım Çözüm

1
Identify the negative qualifier in the question stem.
The prompt requires locating the statement that is NOT true based on the provided text.
Clarifying the negative constraint prevents mistakenly selecting statements that are factually supported by the text.
2
Cross-reference each answer choice against the facts in the passage.
Three options match stated details (shielded two-wire circuits, electromagnetic induction, signal reduction with multiple speakers), while one option asserts the use of auxiliary emergency batteries.
Verifying text evidence for each statement isolates the unsupported or contradicted claim.
3
Evaluate the contradictory statement against passage evidence.
The text states the system operates 'without relying on external electrical power' and 'produces its own operating energy', which directly refutes the claim of using emergency batteries.
Direct textual contradiction confirms the correct negative detail.

Anahtar Kavram

Negative Detail Identification
Tahmini Süre:1m 0s
Soru 4640Soru →

When constructing temporary crossing bridges, combat engineers install resilient decking—that is, flexible and shock-absorbing flooring—to withstand the repeated pounding of heavy supply convoys. This specialized surface prevents structural cracking and extends the lifespan of the span during tactical operations.

As used in the passage, what is the meaning of the word "resilient"?

Cevabı ve açıklamayı göster

Cevap: Flexible and able to absorb shocks

Cevap

Flexible and able to absorb shocks
The author provides a direct synonymous context clue immediately after the target word using the restatement signal 'that is,' which clarifies that 'resilient decking' means 'flexible and shock-absorbing flooring.' Therefore, the option describing the material as flexible and able to absorb shocks is correct.

Adım Adım Çözüm

1
Locate the target word in the passage
Found 'resilient decking' in the first sentence.
Identifying the target word's position is necessary to analyze the surrounding context.
2
Identify the punctuation and synonymous context clue marker
The target word is followed by an em-dash and the explanatory phrase 'that is, flexible and shock-absorbing flooring'.
The phrase 'that is' introduces a direct synonymous definition of the preceding term.
3
Match the synonymous phrase to the answer choices
The phrase 'flexible and shock-absorbing' directly matches 'Flexible and able to absorb shocks'.
Selecting the option that directly reflects the explicit textual definition guarantees the correct answer.

Anahtar Kavram

Identifying Synonymous Context Clues via Restatement Markers
ÖncekiSayfa 232 / 261Sonraki
Tüm alıştırma soruları — Armed Services Vocational Aptitude Battery (ASVAB) | Examkin