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51. In a gas engine, high exhaust temperature can be caused by
a. Cylinder misfire
b. Low boost
c. Under-speed
d. Light load
52. Which tool is used to check ignition timing?
a. Feeler gauge
b. Voltmeter
c. Timing meter
d. Timing light
53. The purpose of an aftercooler or intercooler in a diesel engine is to
a. Reduce inlet air temperature
b. Reduce exhaust temperature
c. Heat cooling system up faster
d. Cool the fuel
54. The temperature of lube oil in a diesel engine must be controlled because?
a. Temperature is not important, only pressured is
b. The higher the temperature of oil, the lower the viscosity to a point
c. Oil oxidizes and becomes carbonaceous at a temperature over 250 degrees F.
d. B and C of the above
Page 19 - EGSA Apprentice Certification Program Study Guide
