When troubleshooting electrical circuits with a digital multimeter set to measure resistan… — Armed Services Vocational Aptitude Battery (ASVAB)

When troubleshooting electrical circuits with a digital multimeter set to measure resistance ( $\Omega$ ), the display reading reflects the physical state of the circuit path. Match each digital multimeter display reading with its corresponding circuit condition.

$0.0\ \Omega$ (Zero resistance with continuity tone)A continuous, closed path with no measurable opposition to current
$\text{OL}$ or $\infty$ (Over-limit / infinite resistance)An open circuit or broken path with no electrical connection
$150\ \Omega$ (Measurable finite resistance)A standard, functional resistive load within its normal operating range

Answer

Zero ohms (

0.0\ \Omega

) matches a continuous, closed path; over-limit (

\text{OL}

) matches an open circuit or broken conductor; and a finite numerical value (

150\ \Omega

) matches a functional resistive load.

A reading of

0.0\ \Omega

indicates that the path is continuous with zero opposition to current. An over-limit display (

\text{OL}

) indicates infinite resistance, which occurs when a conductor is broken or a switch is open. A finite numerical value such as

150\ \Omega

represents an intact resistive component operating normally.

Step-by-Step Solution

Interpret the zero resistance reading (

0.0\ \Omega

)

Identified as full continuity

When meter leads are connected across a continuous conductor or closed switch, opposition to current is zero.

Interpret the infinite reading (

\text{OL}

)

Identified as an open circuit

An interrupted path or broken filament does not permit electron flow, resulting in infinite resistance beyond the meter range.

Interpret the finite numeric reading (

150\ \Omega

)

Identified as a normal resistive component

Operational electrical components such as heating elements or resistors have a rated non-zero resistance value.

Key Concept

Interpreting Digital Multimeter Resistance and Continuity Display Readings

Estimated Time:45s

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