SOS MECHANIC CERTIFICATE ENGINE
REPAIR UPDATED ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS
●● The Purpose of catalytic converter
Answer: oxidize hc co into c02 and h20
●● What vehicles are designed to go into a closed loop operation when
Answer: all of the above
●● Diagram shows a vacuum hose connected to "p vacuum" this means
the hose should be connected
Answer: above the throttle plate
●● If the voltage spike is not high enough on one cylinder, what is the
most likely source of the problem.
Answer: a failed spark plug
●● wide-open-throttle the power train control module reverts
Answer: open loop, rich mixtures
, ●● during a cylinder leakage test air escaping through the throttle body
means there is a leak at
Answer: the intake valve
●● higher than normal oxides of nitrogen (n0x) emissions may be
caused by
Answer: all of the above
●● A reading of 8 volts on meter 2 while cranking would indicate
Answer: an excessive ground circuit voltage drop
●● emission control systems are installed on engines to reduce what 3
specific exhaust products
Answer: Hydrocarbons, carbon monoxide and oxides of nitrogen
●● You have verified a slow cranking complaint, which of the following
should you do next
Answer: Determine the condition of the battery
●● The Egr System is designed to
Answer: cruise
●● You are monitoring the tps signed voltage digital volt ohm
REPAIR UPDATED ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS
●● The Purpose of catalytic converter
Answer: oxidize hc co into c02 and h20
●● What vehicles are designed to go into a closed loop operation when
Answer: all of the above
●● Diagram shows a vacuum hose connected to "p vacuum" this means
the hose should be connected
Answer: above the throttle plate
●● If the voltage spike is not high enough on one cylinder, what is the
most likely source of the problem.
Answer: a failed spark plug
●● wide-open-throttle the power train control module reverts
Answer: open loop, rich mixtures
, ●● during a cylinder leakage test air escaping through the throttle body
means there is a leak at
Answer: the intake valve
●● higher than normal oxides of nitrogen (n0x) emissions may be
caused by
Answer: all of the above
●● A reading of 8 volts on meter 2 while cranking would indicate
Answer: an excessive ground circuit voltage drop
●● emission control systems are installed on engines to reduce what 3
specific exhaust products
Answer: Hydrocarbons, carbon monoxide and oxides of nitrogen
●● You have verified a slow cranking complaint, which of the following
should you do next
Answer: Determine the condition of the battery
●● The Egr System is designed to
Answer: cruise
●● You are monitoring the tps signed voltage digital volt ohm
