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What is the most probable cause of reduced capacity in a reciprocating air compressor ____

题目

What is the most probable cause of reduced capacity in a reciprocating air compressor ________．

A.Carbon on cylinder heads

B.Faulty unloader

C.Leaking air valves

D.Plugged air cooler

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相似问题和答案

第1题：

If a reciprocating air compressor has a knock occurring in frequency with its operating RPM, the cause is probably _____.

A.misalignment or worn main bearings

B.insufficient cylinder lubrication

C.defective or poorly fitted valves

D.All of the above


正确答案：A

第2题：

Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.

A.refrigerant bubbles in the lube oil

B.refrigerant reducing the lube oil viscosity

C.oxidation(氧化) of the lube oil from overheating

D.reducing the floc or cloud point of the oil


正确答案：C

第3题：

what is the use of “unloader “on main air compressor ?


正确答案：The unloader on air compressor is used to reduce the high starting torqueduring starting and also provide a means of draining out the accumulating oil water .

第4题：

单选题
Condensate must be drained from the intercooler and after-coolers of an air compressor because （）.
A

the cooling effect of the condensate reduces the compressors efficiency

B

a danger of explosion exists whenever water is present in a compressor

C

water causes erratic operation of pneumatic components

D

the volumetric capacity of the first stage is reduced if water remains


正确答案： A
解析： 暂无解析

第5题：

The nfsstat -c command shows zero badxid， but retrans and timeouts are sizeable， what is the most probable cause of the problem？（）

  • A、 Too many nfsd’s running
  • B、 Client and server with different buffer sizes
  • C、 Bridges， routers or gateways are receiving too many fragmentated packets
  • D、 Too few nfsd’s running

正确答案:B

第6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


正确答案：C

第7题：

One of the mirrored disks for the root volume group has failed. Although the logical volumes are mirrored, and the bosboot command was run, the machine will not boot. What is the most probable cause?（）

  • A、Quorum was not turned off
  • B、Paging space was not mirrored
  • C、The dump space was not mirrored
  • D、The surviving disk was too small

正确答案:A

第8题：

Web users are reporting issues downloading various types of media. Which of the following shouldthe administrator do FIRST?()

A. Find out what has recently changed on the network

B. Create an action plan and solution identifying potential effects.

C. Continue to gather information and see what other problems may exist.

D. Determine the most probable cause.


参考答案：C

第9题：

单选题
Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.
A

using a slightly dirty air filter

B

using oil having an excessive viscosity

C

intercooler or after-cooler leaks

D

carrying the oil level higher than normal


正确答案： B
解析： 暂无解析

第10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

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