更多"A refrigerant gives up heat when it"的相关试题:
[单项选择]As the refrigerant passes through the valve orifice, its pressure is reduced and part of the refrigerant turns into （）.
A. liquid
B. oily mixture
C. emulsion
D. vapor
[单项选择]The refrigerant flows through the evaporator, where it （） heat from the refrigerated space.
A. extracts
B. releases
C. gives no
D. absorbs no
[单项选择]Refrigerant is circulated through a refrigeration system by the （）.
A. compressor
B. condenser
C. expansion valve
D. evaporator
[单项选择]A fluid coil will （）large quantities of heat when it changes state from a liquid to a vapor.
A. release
B. absorb
C. develop
D. regenerate
[单项选择]A fluid coil will （） large quantifies of heat when it changes state from a liquid to a vapor.
A. release
B. absorb
C. develop
D. regenerate
[单项选择]A pressure drop through the refrigerant liquid line may cause （）.
A. solenoid valve to seize
B. compressor to hunt
C. formation of flash gas in the liquid line
D. expansion valve to freeze open
[单项选择]When picking up your mooring at the buoy，the correct method is to（）.
A. approach the buoy with the wind and current astern
B. approach the buoy with the wind and current ahead
C. approach the buoy with wind and sea abeam
D. stop upwind and up current and drift down on the buoy
[单项选择]（）should you do first when heaving up the anchor.
A. Engage the wildcat
B. Release the brake
C. Release the pawl
D. Engage the motor
[单项选择]Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be （） to maintain ambient conditions within the comfort zone by air conditioning.
A. possible
B. necessary
C. practicable
D. impracticable
[单项选择]The process that occurs when heat is generated by a chemical reaction within a substance and continues to a point of ignition is known as （）.
A. chemical ignition
B. spontaneous combustion
C. chemical combustion
D. radiation ignition
[单项选择]The amount of heat released by steam when it changes to water at the same temperature is called（）.
A. latent heat of condensation
B. latent heat of vaporization
C. latent heat of saturation
D. sensible heat of condensation
[单项选择]When the heat load begins to increase, the needle valve of an expansion valve will（）
A. move in an opening direction
B. move in a closing direction
C. either open or close
D. not move at all
[单项选择]When subjected to high heat from a open flame, or an electric heating element, which of the listed refrigerants will break down and produce phosgene gas?（）
A. CO2
B. Methyl chloride
C. R-22
D. Sulphur dioxide
[单项选择]When does your father get up every morning? He（）up at six.
A. get
B. got
C. gets
D. will
[单项选择]When he suddenly（） up the subject of genetic engineering, there was an embarrassed silence.
A. took
B. brought
C. showed
D. came
[单项选择]When cargo aboard a jack-up in transit becomes adrift，the tow vessel should be asked to （）.
A. turn into the seas
B. turn to be parallel to the seas
C. reduce speed
D. increase speed
[单项选择]The sum of the sensible heat and the latent heat of any substance is known as （）.
A. total heat
B. residual heat
C. specific heat
D. superheat
[单项选择]When can routine communications be resumed when radio silence has been imposed?（）
A. After determining that the frequency or channel appears to be no longer in use
B. After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C. Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D. If，in the Master's opinion，communications on that frequency will interfere with emergency communications
