Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine General (Supplementary) (Set 17)
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Question 1 of 30
One of the main differences between a propeller pump and a centrifugal pump is the absence of a __________.
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30 MCQs #1 One of the main differences between a propeller pump and a centrifugal pump is the absence of a __________. #2 When securing a steam reciprocating pump, which of the valves listed should remain open? #3 The simplest method to use for determining if a centrifugal pump is operating as designed, is to __________. #4 Charring or glazing of the inner circumference of the packing rings in a centrifugal pump, is caused by __________. #5 If a centrifugal pump were continually operated with the discharge valve closed, the __________. #6 Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by __________. #7 Which of the following is NOT an identifiable characteristic of a steam reciprocating pump? #8 According to the illustration, which of the following conditions would most likely cause pump "A" to short cycle? GS-0173 #9 Expansion tanks when used in a ship's low temperature hot water heating system may be of the open or closed type. Referring to the illustrated central-station hookup for a hot-water heating system drawing, what would be the normal temperature range of the water? Illustration GS-0151 oo #10 Referring to the illustrated diagram for a central-station hookup for a hot-water heating system, what statement represents the configuration of the system? GS-0151 #11 Referring to the illustrated drawing of the central-station hookup for a hot-water heating system, what statement is true concerning the air separator on the heated water outlet of the converter? GS-0151 #12 What advantage does a 4-pipe hydronic heating/cooling heating system have over a 2-pipe hydronic heating/cooling system? #13 What type of fan is most commonly used in ducted air-conditioning systems? #14 What pressure drop across an air-conditioning filter is indicative of a need to replace or clean the filter as appropriate? #15 Concerning air-conditioning system steam heating coils, what statement is true? #16 Concerning air-conditioning system hot-water heating coils, what statement is true? #17 What statement is true concerning steam-heated, hot-water heated, or electric- heated convectors? #18 Concerning air-conditioning system dry-expansion cooling coils, what statement is true? #19 To prevent damage to dry cargoes, the cargo hold ventilation and dehumidification systems play a key role. In terms of the maintained dew point, what statement is true? #20 To determine the average cargo hold dew point temperature, at what location would the dew point be measured? #21 What common feature is found on both liquid-desiccant and solid-desiccant cargo- hold dehumidification systems? #22 Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-09
Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration. #23 Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-42
Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration. #24 Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-43
Illustration GS-RA-43: the U.S. Coast Guard has not released this illustration. #25 What type of HVAC system is characterized by a having a split supply air stream, with one for cold air and the other for hot air? #26 In the illustrated single zone HVAC system, what prevents the simultaneous flow of steam through the preheat coil and flow of chilled water through the cooling coil? GS-RA-09
Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration. #27 In the illustrated single zone HVAC system, what statement represents the functioning of the diverting relay as it controls the cooling coil flow and the exhaust, outside air and recirculation dampers? GS-RA-09
Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration. #28 In the illustrated single zone HVAC system, what statement represents the relationship between the exhaust, outside air and recirculation dampers? GS-RS-09
Illustration GS-RS-09: the U.S. Coast Guard has not released this illustration. #29 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the winter outside air duct thermostat? GS-RA-42
Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration. #30 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the summer outside air duct thermostat? GS-RA-42
Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration.
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