The answer options
- Below the cell plates
- Halfway up the battery
- Just above the cell platesCorrect
- To the top of the battery
Why that is the answer
When maintaining a car battery, top it up with distilled water until the fluid is just above the cell plates. The plates must stay completely covered to function correctly and prevent permanent damage. Avoid filling to the top of the battery, because the liquid expands when the battery charges and gets hot, which could cause dangerous corrosive acid to overflow. Always follow recommended safety guidelines when checking under the bonnet.
How this comes up in the real test
Questions from safety and your vehicle appear throughout the 50-question multiple-choice section, and the wording changes between versions. Learn the rule rather than the sentence: the DVSA can ask the same point from the opposite direction, and a memorised answer falls over the moment the phrasing moves.
The pass mark is 43 out of 50, so seven wrong answers is your entire margin. If a whole category is shaky, run the topic practice below until you are getting every question right for the right reason, then go back to full mocks under the clock.
More safety and your vehicle questions
- A vehicle MOT test will include an exhaust emissions test. What is the reason for this?
- Before leaving your vehicle unattended, what should you remove from it?
- How can drivers help the environment?
- How can driving in a fuel-efficient manner help protect the environment?
- How can the volume of traffic on roads be reduced?
- How can you avoid wasting fuel?