Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG General Subjects (Auxiliaries & Systems) (Set 30)

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Question 1 of 30

If a hydraulic pump is producing a noisy whine when in operation, the cause may be __________.

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30 MCQs

#1 If a hydraulic pump is producing a noisy whine when in operation, the cause may be __________. #2 When renewing sections of pipe in a hydraulic system, the nominal pipe size of the piping always indicates the __________. #3 The ability of a metal to be hammered, or rolled out is called its __________. #4 Reheating a hardened component to a temperature lower than the hardening temperature and then cooling it is known as __________. #5 When hardened metal is heat-treated by a process known as tempering, what metallurgical properties are achieved? #6 When metal is tempered, it becomes __________. #7 What is the purpose of heat treating steel? #8 Monel metal is an alloy composed mainly of __________. #9 When a metal is undergoing heat treatment, what happens when the metal is heated above its critical temperature? #10 When a metal is undergoing heat treatment for the purposes of annealing, besides refining the grain structure, what is the determining characteristic of the metal? #11 When a low carbon steel is undergoing heat treatment for the purposes of casehardening, what is the process that distinguishes this procedure from other hardening methods? #12 What effect does preheating, concurrent heating, or post heating have on welding a joint? #13 What is meant by the term tensile strength of a material? #14 What is meant by the term toughness as it applies to a material? #15 Referring to the illustration, what would be the result if the upper oil/water interface detection probe became faulty? Illustration GS-0175 #16 Referring to the illustration, note that the solenoid in line "C" is closed. The check valve in line "E" is open. The separator service pump is running. The check valve in line "G" is closed. Valve "B" is open. Valve "D" is closed. What is the operational status of the oily-water separator unit? Illustration GS-0175 #17 Referring to the illustration, note that the solenoid in line "C" is closed. The check valve in line "E" is open. The separator service pump is running. The check valve in line "G" is closed. Valve "B" is closed. Valve "D" is open. What is the operational status of the oily-water separator unit? Illustration GS-0175 #18 How would the pressure setting of the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducer be raised to a higher set point? Illustration GS-0044 #19 In the illustrated self-contained, internal-pilot, piston-operated steam pressure-reducing valve, what statement is true concerning the pilot and main valves? Illustration GS-0044 #20 Suppose the illustrated self-contained, internal-pilot, piston-operated temperature control valve is part of the temperature control system for a steam-heated heavy fuel oil service heater for a steam boiler. If there was a decrease in demand for fuel by the boiler, what statement correctly represents how the valve would initially respond? Illustration GS-0045 #21 Referring to the illustrated huddling-chamber safety valve, what statement concerning the blow down adjusting ring (B) is true? Illustration SG-0018 #22 Referring to the illustrated huddling-chamber safety valve, what statement is true concerning the adjustment of blow down? Illustration SG-0018 #23 In the illustrated huddling-chamber safety valve, what statement is true concerning the opening and closing forces acting upon the disc? Illustration SG-0018 #24 Suppose the pilot controller for the illustrated pneumatically operated diaphragm actuated control valve is supplied with 20 psig control air and is designed to operate the valve with a pilot pressure ranging from 3 to 15 psig. What would be the indication of a properly adjusted spring (6) by means of the adjusting nut (12)? Illustration GS-0051 #25 Suppose the illustrated pneumatically operated diaphragm actuated control valve is used to control the fuel oil outlet temperature of a steam-heated heavy fuel oil heater by controlling the steam flow. What would be the result if there was a complete loss of pilot air being delivered to the valve actuator? Illustration GS-0051 #26 Suppose the pilot pressure is from 3 to 15 psig for the illustrated pneumatically operated, diaphragm actuated control valve. Assuming the control valve is trimmed for a linear response and the travel position indicator is calibrated in percentage, what would be the approximate pilot pressure if the position indicator showed the valve to be 75% open? Illustration GS-0051 #27 What type of steam trap is most susceptible to damage if allowed to come into contact with superheated steam? #28 Referring to the illustrated impulse steam trap, what would be the effect of threading the control cylinder "E" upward out of the trap body? Illustration GS-0002 #29 The term, whole depth of the gear, shown in the illustration, is equal to __________. Illustration GS-0111 #30 In the illustration shown, what is the distance indicated by dimension "I"? Illustration GS-0001

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