海船船员考试
单选题In practice, the refrigerant flow after the evaporator is designed to ensure that the vapor leaving the evaporator is slightly （）.A saturatedB super-cooledC wetD superheated
题目
saturated
super-cooled
wet
superheated
参考答案和解析
相似问题和答案
第1题：
In a chilled(冷的) water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by ______.
A.increasing refrigerant pressure in the coil
B.increasing chilled water flow through the cooler
C.sub-cooling the refrigerant in the condenser
D.superheating the refrigerant in the compressor
第2题：
Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause______.
A.carbon deposits on the compressor suction valves
B.the evaporator temperature to increase
C.rapid corrosion of the thermal expansion valve
D.no operating problems
第3题：
The temperature of the refrigerant in the evaporator coil depends mostly upon the ___.
A.refrigerant pressure in the evaporator
B.cooling water temperature to the condenser
C.heat load in the refrigerator compartment
D.solenoid valve in the liquid line
第4题：
too much refrigerant in the system
oil entrained in the refrigerant
less than a full charge of refrigerant in the system
ice crystals forming in the refrigerant
第5题：
refrigerant must be bled off the sensing line before adjustments are made
all refrigerant must be pumped into the receiver before adjustments are made
time must be allowed for conditions to stabilize in the evaporator before further adjustments are made
all refrigerant must be routed through the dehydrator while changing the superheat setting
第6题：
The heat gained per pound of refrigerant in the evaporator is known as the ______.
A.latent heat of vaporization
B.sensible heat
C.refrigerating effect
D.specific heat of vaporization
第7题：
compressor
cooling coils
condenser
receiver
第8题：
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?
A.A shortage of liquid refrigerant.
B.Excessive frost on the evaporator.
C.Excessive condenser cooling water.
D.Insufficient condenser cooling water flow.
第9题：
restriction in refrigerant piping
air and non-condensable gases in the condenser
water in the refrigerant
flooding back of liquid refrigerant from the evaporator
第10题：
too much cooling water going through the condenser
not enough refrigerant in the system
a leak in the evaporator coils
no enough cooling water going through the condenser