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23 April, 08:36

An engine miss is being diagnosed using a cylinder leakage test. Technician A says that any cylinder with over 20 percent leakage has excessive leakage. Technician B says that air leaking from the tailpipe indicates a cracked cylinder head. Who is right? A. A only

B. B only

C. Both A and B

D. Neither A nor B

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Answers (2)
  1. 23 April, 09:40
    0
    Answer A is correct

    Step-by-step explanation:

    When the leakage of the cylinder exceeds 20%, things are needed to by checked according to technician A, like the air that will escape from the tailpipe, the top of the throttle carburetor, the PVC, which is called the positive crankcase ventilation valve that will open or opening in the rocker arm cover.
  2. 23 April, 10:33
    0
    (A) A only

    Step-by-step explanation:

    As per the question,

    An engine miss is being diagnosed using a cylinder leakage test, and

    We know that if there is a leakage of air from the tail pipe, it generally indicates the leakage from an exhaust vale. Therefore we can say that the statement given by technician B that is air leaking from the tailpipe indicates a cracked cylinder head is wrong.

    Now,

    According to technician A

    If the leakage in the cylinder exceeds over 20%, that means air is escaping from the the tailpipe, the PCV valve opening in the rocker arm cover, and the top of the throttle body or carburetor. That means excessive leakage.

    Therefore, Technician A is correct.
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