更多"A refrigeration unit will tend to s"的相关试题:
[单项选择]If a refrigeration system were short of refrigerant, the condition would result in （）.
A. continuous running of the compressor
B. high suction pressure
C. high discharge pressure
D. short cycling of the compressor on the water failure switch
[单项选择]If a refrigeration compressor is short cycling on high head pressure, you should （）.
A. purge the condenser if the waterside is dirty
B. check for proper water flow through the condenser
C. increase the high pressure cutout setting
D. reduce the cooling water flow
[单项选择]If a refrigeration compressor were short cycling on the low pressure cutout switch, the probable cause for this might be the （）.
A. system was overcharged with refrigerant
B. high pressure switch was improperly adjusted
C. expansion valve strainers were fouled
D. suction valves were leaking slightly
[单项选择]If a refrigeration crankcase compressor were short cycling on the low pressure cutout switch, the cause might be that the （）.
A. system was overcharged with refrigerant
B. system was low on refrigerant
C. suction valves were leaking slightly
D. relief valve was leaking slightly
[单项选择]Short cycling of a refrigeration compressor refers to （）.
A. frequently grounding out
B. frequently starting and stopping
C. running too fast
D. running too slow
[单项选择]When crossing a front,isobars tend to（）.
A. change from smooth curves within the air mass to sharp bends at the front
B. change from sharp bends within the air mass to smooth curves at the front
C. pass smoothly across the front with no change
D. become closer together at the front and pass through in straight lines
[单项选择]When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the（）
A. intake stroke
B. compression stroke
C. power stroke
D. exhaust stroke
[名词解释]Instruction Decode Unit
[单项选择]Gasoling fumes tend to（）.
A. settle near the bottom of the blige
B. settle near the top of the bilge
C. settle evenly throughout all levels of the bilge by mixing with air
D. disperse to atmosphere
[单项选择]Gasoline fumes tend to（）.
A. settle near the bottom of the bilge
B. settle near the top of the bilge
C. settle evenly throughout all levels of the bilge by mixing with air
D. disperse to atmosphere
[单项选择]Cyclones tend to move（）.
A. perpendicular to the isobars in their warm sectors
B. parallel to the isobars in their warm sectors
C. parallel to the line of the cold front
D. perpendicular to the line of the cold front
[单项选择]River currents tend to（）.
A. pick up speed where the channel widens
B. run slower in the center of the channel
C. hug the inside of a bend
D. cause the greatest depth of water to be along the outside of a bend
[名词解释]Bus Interface Unit BIU
[单项选择]Auditors tend to let directors get away with murder, for if they protest at creative accounting the firm is promptly have them sacked in favor of substitutes that will not jib at economy with the facts.（）
A. 审计员们一般都会让董事们过关，因为如果抗议公司篡改数据，他们马上就会被那些不会对实际经济状况说三道四的人替代。
B. 审计人员往往会让那些董事为所欲为，这是因为如果他们对公司伪造的账目表示抗议，公司立即就会让他们滚蛋，而让那些不会对实际经济状况挑刺的人来取代他们。
C. 审计师倾向于让那些有问题的董事逍遥法外，假如他们对有违规操作的会计操作稍有微词，企业行会立即抄他们的鱿鱼，取而代之的是那些对经济实况认可的人。
D. 稽查人员有时会出于疏忽而让那些管理人员即使犯错也不受惩罚，因为他们只要对公司的创造性账目的检查提出不满，公司就会将他们赶走，而请其他默认公司经济实况者来干。
[判断题]FILLING CYCLE的涵义是灌装循环。
[单项选择]In a compression refrigeration cycle, the temperature of the liquid refrigerant experiences its greatest decrease in the（）.
A. evaporator
B. compressor
C. expansion valve
D. condenser
[名词解释]二环系（second cycle line）
