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

USCG Refrigeration & Air Conditioning (Set 21)

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Question 1 of 10

Referring to illustrated diagram, what type of HVAC system is shown? Illustration GS-RA-09 Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration.

Browse Questions in Set 21

10 MCQs

#1 Referring to illustrated diagram, what type of HVAC system is shown? Illustration GS-RA-09 Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration. #2 What common feature is found on both liquid-desiccant and solid-desiccant cargo-hold dehumidification systems? #3 In the illustrated terminal reheat multiple zone system, what statement represents the functioning of the summer outside air duct thermostat? Illustration GS-RA-42 Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration. #4 Referring to the illustrated dual duct multiple zone HVAC system, how is the space temperature directly controlled? Illustration GS-RA-43 Illustration GS-RA-43: the U.S. Coast Guard has not released this illustration. #5 In the illustrated single zone HVAC system, what statement represents the relationship between the exhaust, outside air and recirculation dampers? Illustration GS-RS-09 Illustration GS-RS-09: the U.S. Coast Guard has not released this illustration. #6 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? Illustration GS-RA-09 Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration. #7 Referring to the illustrated psychrometric chart, under what conditions are the dry bulb, wet bulb, and dew point temperatures for air all equal in value? Illustration GS-RA-22 Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #8 Referring to the illustrated psychrometric chart, suppose during the cooling season that air passes over a cooling coil with a mean surface temperature above the dew point temperature, and this results in sensible heat loss with no change in moisture content. What statement represents the direction of the air conditioning process line? Illustration GS-RA-22 Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #9 Referring to the illustrated psychrometric chart, if the dry bulb temperature is 70oF and the relative humidity is 40%, what is the absolute humidity? Illustration GS-RA-22 Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration. #10 Referring to the illustrated psychrometric chart, suppose air at a dry-bulb temperature of 60oF and a relative humidity of 52% passes over a heating coil, resulting in sensible heat gain, and the off-coil temperature is now 80oF. What is off-coil relative humidity? Illustration GS-RA-22 Illustration GS-RA-22: the U.S. Coast Guard has not released this illustration.

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