海船船员考试

单选题Excessively low air pressure occurring in the intercooler of a reciprocating air compressor is caused by（）.A leaky discharge valves on the LP cylinderB leaky discharge valves on the HP cylinderC insufficient intercooler coolingD low ambient air pressur

题目
单选题
Excessively low air pressure occurring in the intercooler of a reciprocating air compressor is caused by（）.
A

leaky discharge valves on the LP cylinder

B

leaky discharge valves on the HP cylinder

C

insufficient intercooler cooling

D

low ambient air pressure

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相似问题和答案

第1题：

Restrictions occurring in the small orifices(孔) of pneumatic control system components can be caused by ______.

A.moisture in the compressed air supply

B.excessive dryness in the compressed air supply

C.pressure surging in the compressed air receiver

D.insufficient lubrication of the system components


正确答案：A

第2题：

单选题
A dirty intercooler on an air compressor will cause （）.
A

damage to the un-loader operating diaphragm

B

an increase in current flow to the motor

C

high pressure in the receiver and filter

D

an excessive consumption of crankcase oil


正确答案： C
解析： 暂无解析

第3题：

High cylinder firing pressure, accompanied by low exhaust temperature, can result from ___.

A.improper fuel rack positing

B.lengthy exhaust valve duration

C.extend operation at light load

D.excessively early injection timing


正确答案：D

第4题：

单选题
Compared to a low pressure system，generally the air in a high is（）.
A

warmer，less dense，and less stable

B

cool，more dense，and drier

C

muggy and cloudy

D

extremely moist with high relative humidity


正确答案： D
解析： 暂无解析

第5题：

单选题
Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）
A

clogged air filter

B

compression stroke

C

burned exhaust valves

D

all of the above


正确答案： C
解析： 暂无解析

第6题：

A low in a marine weather report is an air pressure system the pressure at the center of which is ______.

A.the highest over the area

B.the lowest over the area

C.higher than 1013 HPA

D.lower than 1013 HPA


正确答案：B
低气压在航海天气报告中是气压系统中心气压最低的区域。

第7题：

单选题
The sudden reduction of pressure occurring within the crankcase of a refrigeration compressor during starting causes the （）.
A

sudden evaporation of wax crystals in the lubricant

B

sudden evaporation of entrapped air in the lubricant

C

release of refrigerant from the oil/refrigerant mixture

D

release of dissolved lubricant from the refrigerant


正确答案： B
解析： 暂无解析

第8题：

Air trapped in the hydraulic fluid of a steering system may be indicated by

A.the steering pumps overspeeding

B.a jammed open relief valve

C.a constantly occurring improper rudder response

D.excessive ram pressure


正确答案：C

第9题：

单选题
In an air conditioning system, low head pressure associated with a reciprocating compressor can be the result of （）
A

broken valve springs

B

tight drive belts

C

high line voltage

D

air in the system


正确答案： A
解析： 暂无解析

第10题：

单选题
Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means （）.
A

cast iron has weakness

B

cast iron can stand up shock loading

C

cast iron fittings are only suitable in low pressure situation

D

east iron fittings are not suitable in low pressure situation


正确答案： C
解析： 暂无解析

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