海船船员考试

单选题When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.A dryB wetC super-cooledD superheated

题目
单选题
When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.
A

dry

B

wet

C

super-cooled

D

superheated

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相似问题和答案

第1题：

Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its ______.

A.freezing point

B.floc point(浊点)

C.condensing temperature

D.compression temperature


正确答案：C

第2题：

单选题
Your vessel is taking on bunkers from a shore side facility, if oil begins flowing from one tank vent, which of the following actions should be taken FIRST?（）
A

Open the intake valve to an adjacent tank

B

Set out drip pans and sawdust and begin to mop up the spill

C

Signal the shore control point to shutdown

D

Close the valve on the tank vent line


正确答案： C
解析： 暂无解析

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


正确答案：A

第4题：

单选题
Fuel oil tank vents are fitted with a screen which will stop（）.
A

oil from flowing out of the tank vent

B

air from entering the tank vent

C

vapors from leaving the tank vent

D

flames on deck from entering the tank vent


正确答案： A
解析： 暂无解析

第5题：

单选题
An over-speed trip stops a diesel engine when the engine （）
A

runs out of fuel

B

has low lubricating oil pressure

C

exceeds a set maximum speed

D

has high cooling water temperature


正确答案： B
解析： 暂无解析

第6题：

class A {  public A（） {  System.out.println（“hello from a”）；  }  }  class B extends A {  public B （） {  System.out.println（“hello from b”）；  super（）；  }  }  public class Test {  public static void main（String args[]） {  A a = new B（）；  }  }   What is the result when main is executed？（）  

  • A、 Compilation fails.
  • B、 hello from a
  • C、 hello from b
  • D、 hello from b hello from a
  • E、 hello from a hello from b

正确答案:A

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：

If the superheat value of a thermostatic expansion valve is set too low, the _.

A.the suction line will be abnormally cold and liquid may slug back to the compressor

B.the suction line will be hot due to a reduced amount of refrigerant returning to the compressor

C.the temperature of the refrigerant within the condenser will remain the same

D.the temperature of the refrigerant passing through the sub-cooler will decrease


正确答案：A

第9题：

单选题
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
A

restriction in refrigerant piping

B

air and non-condensable gases in the condenser

C

water in the refrigerant

D

flooding back of liquid refrigerant from the evaporator


正确答案： C
解析： 暂无解析

第10题：

单选题
When pushing ahead，wires leading from the quarters of the after outboard barges to the bow of a towboat（）.
A

prevent the towboat from sliding when the rudder is moved

B

prevent the barges from spreading out when backing down

C

hold the towboat securely to the barges

D

prevent the sidewise movement of the face barges


正确答案： A
解析： 暂无解析

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