Step 3 » GENERAL learning environment Category C (C, C1)

GENERAL Learning Environment Category C (C, C1)
Question 101 of 533

The most important characteristics of spark plugs are:

A the thickness of the ceramic insulator and its colour;
B the thread size and the heat rating;
C the warranty period and the consistency of the spark.

Explanation

Explanation text category C / driving tests drpciv:
The most important characteristics of spark plugs are the thread size and the heat rating. Therefore, when we replace the spark plugs we must take spark plugs with the same thread size. The heat rating is also important because it is the time until the spark plug reaches the temperature at which the electrodes self-clean.
Correct answer: B
 
Driving tests drpciv category C explained.

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