Page 77 - Apprentice Manual_Neat

S2-Q44.) Which is not a major component of an electric starter assembly?

a.) Motor
This is the primary component.
b.) Pinion Gear
This is the gear that engages the engine being started.
c.) Solenoid
This forces the pinion gear into position.
d.) *Relay
Correct. Relays are not used in starter assemblies.

S2-Q45.) 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.
This would affect the engine performance, but would place a load on the supply of fuel.
b.) *Piping size.
Correct. If a 1” dia. pipe is required and a ½” dia. pipe is used instead, the flow will be
restricted by a factor of 4. Piping should be designed to provide adequate flow for the device
being supplied. Check installation information for piping size.
c.) Engine timing.
This would affect the engine performance, but would place a load on the supply of fuel.
d.) Air intake is plugged
This would affect the engine performance, but would place a load on the supply of fuel.

S2-Q46.) Which gaseous fuel has the greatest BTU content?

a.) *Propane
Correct. Of the fuels listed here propane has the highest btu content. This is followed by
natural gas and then methane.
b.) Diesel
While diesel fuel has a higher btu content than any of the other fuels listed, it is not gaseous.
c.) Natural gas
Natural gas is second behind propane.
d.) Methane
The lowest btu content of the gasses listed here.

S2-Q47.) The efficiency of a cooling radiator would be impacted by which of the following?

a.) Generator loading.
This may have an effect on temperature rise, but not the efficiency of the radiator.
b.) Voltage being generated.
This should not have effect on temperature rise of efficiency.
c.) *Adjacent structures.
Adjacent structures block air flow and can raise the ambient temperature.
d.) Type of fuel the engine uses.
This may raise the temperature, but efficiency will not be affected.

Page 69 - EGSA Apprentice Certification Program Study Guide