Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid line If excess moisture is present in the system, the indicator willA.activate the driersB.change colorC.secure the compressorD.add a

Cargo damaged due to water being present in a cargo hold，as a result of a leak in the hull plating，is said to be damaged by：Ⅰ．Free moisture．Ⅱ．Transfer of hygroscopic moisture．Which of the following is correct?

A.Ⅰ only

B.Ⅱ only

C.Both Ⅰ and Ⅱ

D.Neither Ⅰ nor Ⅱ

What is a wet cargo ________．

A.A liquid cargo carried in the deep tanks

B.A canned or bottled liquid such as beer

C.A cargo that contains hygroscopic moisture

D.A cargo particularly susceptible to damage by moisture

Moisture is removed from a refrigeration system by

A.bleeding refrigerant from the condenser

B.opening a drain petcock on the oil separator

C.condensing the water in the heat exchanger

D.using a dehydrator cartridge

A hygroscopic cargo is defined as a cargo ______．

A.capable of absorbing moisture in the form of a gas

B.capable of giving off moisture in the form of a liquid

C.that is shipped in a liquid state

D.that will ignite in contact with water

The moisture equilibrium chart can be used to determine the ______．

A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists

B.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity

C.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo

D.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo

In the refrigeration system, a shortage of refrigerant is indicated by

A.the compressor short cycling on high pressure cut out switch

B.high suction pressure

C.high head pressure

D.bubbles in the sight glass