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Question

Difficulty: MediumBasic Maintenance and Daily Checks

When topping up the windscreen washer reservoir in winter, using plain water without a screenwash additive is sufficient to keep the system working effectively.

Answer: Answer

Answer

False
The statement is false because plain water will freeze in the washer jets, delivery pipes, and reservoir in freezing winter conditions, making it impossible to clear salt and dirt from the windscreen. A correct concentration of screenwash additive containing anti-freeze is required to prevent freezing and effectively clear greasy road film.

Step-by-Step Solution

1
Identify the operational risks of using plain water in a vehicle windscreen washer system during cold weather.
Recognise that plain water freezes at 0°C without anti-freeze protection.
Sub-zero temperatures cause plain water to solidify in the reservoir, delivery lines, and washer nozzles.
2
Assess the impact of frozen washer fluid on road safety and vehicle components.
Determine that frozen fluid prevents the driver from cleaning the windscreen while driving and can damage the washer pump.
Maintaining a clear view of the road through functioning washers is a critical roadworthiness requirement.
3
Conclude whether plain water alone is sufficient for winter maintenance.
Conclude that a dedicated screenwash additive containing anti-freeze must be added, rendering the statement false.
Screenwash lowers the freezing point of the liquid and cuts through greasy traffic film.

Key Concept

Windscreen washer fluid maintenance and winter freeze prevention
Estimated Time:45s
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Topics

Basic Maintenance and Daily Checks

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