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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Freon
Brine
Carbon dioxide
Ammonia

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Hydrogen evaporates in ammonia
Ammonia is absorbed in water
Ammonia evaporates in hydrogen
Ammonia is absorbed in hydrogen

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Two fluids
Single fluid
Three fluids
None of the listed here

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Nontoxic and non-inflammable
Inflammable
Non-inflammable and toxic
Toxic

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Heated and humidified
Cooled and dehumidified
Heated and dehumidified
Cooled and humidified

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Refrigeration and Air Conditioning
The material of pipe lines for a system using Freon as a refrigerant should be

Brass
Steel
Copper
Aluminium

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MORE MCQ ON Refrigeration and Air Conditioning

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