Step 3 » GENERAL learning environment Category D (D, D1, Tb, Tv)

GENERAL Learning Environment Category D (D, D1, Tb, Tv)
Question 196 of 485

In the intake and exhaust manifolds, the misfires occur as a result of:

A the engine overspeeding;
B the engine overheating;
C the clearance being too small between the rocker arms and the valves.

Explanation

Explanation text category D / driving test questions drpciv:
When the thermal clearance (between rocker arms and valves) is too small or nonexistent, the valves do not close completely and gas leaks appear, which lead to misfires (in the intake or at the exhaust). Therefore, in the intake and exhaust manifolds, the misfires occur as a result of the clearance being too small between the rocker arms and the valves.
Correct answer: C
 
Driving test questions drpciv category D explained.

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