Level 1 Qtrly Practice Quiz Jan 25

The low oil pressure warning light usually comes on ________.

• whenever an oil change is required

• whenever oil pressure drops dangerously low (4 to 7 psi)

• whenever the oil filter bypass valve opens

• whenever the oil filter antidrainback valve opens

Technician A says that a minor overhaul can often be done with the engine remaining in the vehicle. Technician B says that a core is required for most remanufactured engines. Which technician is correct?

• Technician A

• Technician B

• Both technicians

• Neither technician

Which term describes the PCM using oxygen sensor feedback to control fuel delivery?

• Open loop mode

• Closed loop mode

• Starting mode

• Clear flood mode

Which one of these sensors is NOT used to determine injector pulse width during open-loop mode?

• MAF sensor

• TP sensor

• Oxygen sensor

• ECT sensor

An engine oil cooler uses what to cool the oil?

• Coolant

• Air

• Air conditioning evaporator output

• Automatic transmission fluid after it flows through the radiator

Which of these smoke colors indicates excessive fuel being burned in the combustion chamber?

• Blue

• Black

• White

• Gray

Identify the type of ignition system shown in this diagram.

• Waste spark ignition system

• Distributor ignition system

• Capacitor discharge system

• Coil-on-plug ignition system

Technician A says that vacuum-operated fuel pressure regulators maintain an equal pressure drop across the fuel injectors all the time. Technician B says that intake manifold pressure is high at idle. Which technician is correct?

• Technician A only

• Technician B only

• Both technicians

• Neither technician

Water pumps ________.

• only work at idle and low speeds and are disengaged at higher speeds

• use engine oil as a lubricant and coolant

• are driven by the engine crankshaft or camshaft

• disengage during freezing weather to prevent radiator failure

Which of the following is the least likely to cause an engine noise?

• Carbon on the pistons

• Cracked exhaust manifold

• Loose accessory drive belt

• Vacuum leak