單項選擇題Intake air flow from a diesel engine turbocharger is directly proportional to engine()

A.exhaust gas pressure
B.exhaust gas temperature
C.speed
D.load


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1.單項選擇題Which of the listed conditions can be used to determine if lube oil has been diluted by fuel? ()

A.Viscosity is decreased
B.Octane number is altered
C.Pump speed is decreased
D.Blower’s speed is decreased

2.單項選擇題It is easier to replace a dry cylinder liner than a wet one because()

A.of the thin wall thickness
B.honing makes it easier to maintain the desired oil ilm
C.water seals are not required
D.it fits more loosely due to a decrease in heat transfer through the composite wall

4.單項選擇題Which of the following problems will occur if the needle valve in a fuel injection nozzle sticks in the open position?()

A.Fuel injection timing will change
B.Nozzle operation will be unaffected
C.Fuel will leak into the drain line
D.Fuel will not be delivered

5.單項選擇題A dry-type exhaust muffler clogged with soot, will cause()

A.low exhaust temperature
B.loss of engine power
C.burned intake valves
D.engine racing