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45. While testing a propane generator from no-load to full-load, the propane pressure reads 11” H2O,
but at ¾ load the pressure drops to half that value. Which of the following is most likely the
problem?

a. The carburetor is probably set for gasoline
b. Piping size
c. Engine timing
d. Air intake is plugged

46. Which gaseous fuel has the greatest BTU content?

a. Propane
b. Diesel
c. Natural gas
d. Methane

47. The efficiency of a cooling radiator would be impacted by which of the following?

a. Generator loading
b. Voltage being generated
c. Adjacent structures
d. Type of fuel the engine uses

48. Which of the following determines the minimum temperature of the coolant when the engine is
running?

a. Thermostat
b. Radiator
c. Fan
d. Timing

49. What is the purpose of an intercooler (after-cooler)?

a. Reduce intake charged air temperature
b. Mix intake air with intake fuel
c. Increase water pressure
d. Increase boost pressure

50. Excessive backpressure can cause which of the following?

a. High exhaust temperature and low power
b. Low exhaust temperature and high power
c. High exhaust temperature and high power
d. Low exhaust temperature and low power

EGSA Apprentice Certification Program Study Guide - Page 18