更多"In the condenser, the hot, high pre"的相关试题:
[单项选择]High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
[单项选择]Low cylinder compression pressure and a high exhaust temperature may indicate （）
A. early fuel injection timing
B. leaking valves
C. a continuously open scavenge air port
D. low cooling water temperature
[单项选择]The greater the pressure difference between a high and a low pressure center，the（）.
A. dryer the air mass will be
B. cooler the temperature will be
C. greater the force of the wind will be
D. warmer the temperature will be
[单项选择]Which will cause the high pressure cutout to stop the compressor in a R-22 system?（）
A. Condenser leakage
B. A shortage of liquid refrigerant
C. Excessive frost on the evaporator
D. Not enough condenser cooling water
[单项选择]The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with （）.
A. a needle gun
B. soap and water
C. a wire brush
D. a chipping hammer
[单项选择]As a high pressure system approaches，the barometer reading（）.
A. stays the same
B. falls
C. rises
D. falls rapidly
[单项选择]The atmosphere in the vicinity of a high pressure area is called a(n)（）.
A. anticyclone
B. cold front
C. occluded front
D. cyclone
[单项选择]If the head pressure is too high,（）
A. the relief valve should open before the high-pressure cutout
B. the relief valve should open and let excess refrigerant go to receiver
C. the high-pressure cutout switch should operate before the relief valve opens
D. close in on the suction valve
[单项选择]In a compression refrigeration plant the refrigerant flows from the expansion valve and through the （） where it absorbs heat from the space being cooled and becomes a gas or vapor.
A. compressor
B. condenser
C. throttle valve
D. evaporator
[单项选择]Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
A. Sub-cooled liquid
B. Sub-cooled vapor
C. Superheated vapor
D. Liquid
[单项选择]When a high pressure system is centered north of your vessel in the Northern Hemisphere（）.
A. You should experience hot，moist，clear weather
B. The wind direction is generally easterly
C. The winds should be from the southwest at your location
D. The winds should be brisk
[单项选择]Two well-developed high pressure areas may be separated by a（）.
A. Hill of low pressure
B. Trough of low pressure
C. Valley of low pressure
D. Ridge of low pressure
[单项选择]Most high pressure areas are accompanied by（）.
A. precipitation
B. clear，cool weather
C. humid，sticky weather
D. cool fogs
[单项选择]High pressure ridge（）from Sevastopol to eastern Libya.
A. reaching
B. extending
C. increasing
D. upgrading
[单项选择]High exhaust back pressure will result in an increase in （）
A. turbocharger efficiency
B. engine power output
C. carbon deposits on fuel injectors
D. cylinder scavenging
[单项选择]The device used for low-pressure control and high-pressure cutout on a compressor is called a（）
A. cutout
B. pressure controller
C. controller switch
D. cutout switch
