Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine General (Supplementary) (Set 5)
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Question 1 of 30
When piston rod packing persists in leaking on a reciprocating steam pump, the cause may be __________.
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30 MCQs #1 When piston rod packing persists in leaking on a reciprocating steam pump, the cause may be __________. #2 The function of the section labeled "C" in the device illustrated is to provide a/an __________. GS-0075 #3 What type of pump is shown in the illustration? GS-0144 #4 The best gasket material to use in cargo fuel oil lines is __________. #5 Which of the gasket types listed is typically used on high pressure steam flange joints? #6 A gate valve installed in a piping system should be used __________. #7 Which of the following statements is true concerning the valve shown in the illustration. GS-0047 #8 What type of valve is shown in the illustration? GS-0047 #9 The illustrated valve is known as a __________. GS-0056 #10 The valve depicted in the illustration shown is a __________. GS-0055 #11 To remove a hand held right-handed straight cut reamer after it has gone all the way through a hole, you should __________. #12 Which of the illustrations depicts the correct procedure for applying pipe dope? GS-0046 #13 While riding at anchor, the anchor chain should be secured by the __________. #14 The part of the anchor windlass that engages the anchor chain for lifting is called the __________. #15 A shot of anchor chain has a length of __________. #16 The hydraulic pump which would be mounted on the unit shown in the illustration, may begin to cavitate if __________. GS-0118 #17 In the hydraulic anchor windlass system illustrated, if the power to the electric motor is on, but the wildcat turns slowly or not at all, even without a load being applied, and nearly normal pressure is indicated on the high side of the system, the probable cause is the __________. GS-0160 #18 In the hydraulic anchor windlass system illustrated, if the power to the electric motor is on, but the wildcat does not turn, the pressure developed on either side of the system increases to half of the normal operating pressure regardless of the direction of movement in which the servo control is placed, the probable cause is the __________. GS-0160 #19 In the hydraulic anchor windlass system illustrated, the main pressure relief valve opens as the load increases its strain on the system. The probable cause is the __________. GS-0160 #20 In a two stage centrifugal air conditioning system, the liquid refrigerant passes through the condenser directly to what component? #21 What is one benefit of maintenance of proper air circulation in an air conditioned cargo space? #22 In general, the thermal bulb for a thermal expansion valve used in a reciprocating air conditioning system is usually charged with what substance? #23 Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system? #24 If outside air at 80 degrees F and 70 percent relative humidity is conditioned, what will be the resulting dew point temperature of the air just before it comes into contact with the cooling coil? See Illustration GS-RA-22
Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #25 To add small amounts of refrigerant to the low side of an air conditioning system, the refrigerant should be introduced through a particular valve and in a particular state. What valve and state combination is correct? #26 When pumping down an air conditioning system to test the low pressure cutout switch, assuming that the compressor is running, what should be done to initiate the test? #27 The compressor used in a water-cooled air conditioning system is short cycling. A service check determines that the suction pressure remains above the normal cut-in point during cycling and that the discharge pressure rapidly builds up to the cut-out point while running and gradually falls to the cut-in point during the off cycle. What is likely the cause? #28 Concerning the arrangement of equipment and associated hoses shown in the illustration, what statement is true? Illustration GS-RA-58
Illustration GS-RA-58: the U.S. Coast Guard has not released this illustration. #29 The surging that occurs in a centrifugal air conditioning compressor is a result of what conditions? #30 In an air conditioning system, low discharge head pressure associated with a reciprocating compressor can be the result of what condition?
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