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Freezing point of the refrigerant should be well above the expected evaporator temperature
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Which of the following diagram is also known as Mollier diagram:
A vent material listed and labeled for use with wall furnaces is type _____ vent.
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Pressure drop in the refrigeration system is expressed in terms of:
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Shell and tube condenser is similar in construction to the flooded chiller:
A low pressure switch is provided to stop the compressor when the compressor _______ pressure falls below the safety limits:
The ______ connects the compressor to the condenser
Most of the refrigeration gases are heavier than air
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The volumetric efficiency of the compressor reduces as the evaporating temperature ______
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As the condensing temperature increases, centrifugal compressor capacity _______ :
Refrigerants operating in refrigerating systems shall have _______ pressure:
Which of the following refrigerants have greater stability in lower parts of the atmosphere:
The solubility of the water in the commonly used refrigerants is low
The capacity of the refrigeration system is expressed in which of the following units: (Multiple Answer Question)
As the Suction pressure comes down, the compressor capacity will ______:
The pressure drop caused in the suction filter will be ____:
In which of the following pipes the higher-velocity refrigerant is closer to the inner walls of the pipe:
At the right end of the dew point lines, the vertical scale is the Dry bulb temperature:
R-410a is the best replacement for R-22 refrigerant
When the liquid level is below the sensing bulb, the vapor surrounding the bulb carries away the heat from the electric heater at relatively ____ rate:
In which of the following compressor, the piston moves alternatively downwards and upwards in a cylinder:
A mechanical draft venting system shall terminate at least ____ feet above any forced air inlet located within 10 feet.
High molecular weight of the Freon compounds contributes to ____ specific heat values
Vertical lines in Psychromteric charts indicate constant ______ in °C or °F:
The high molecular weight of the Freon compounds contributes to low latent heats of vaporization
Smoke detectors shall be installed in return air systems with a design capacity greater than ________ cfm.
A minimum openable area to the outdoors shall be ______ percent of the floor area being naturally ventilated.
Vapor can be present in the liquid line, if there is _______ pressure drop in the liquid line:
The CFC and HCFC refrigerants were:
Oil used in refrigeration system is used for which of the following:
Which of the following refrigerant has least density:
The hydrolysis rate for the Freon compounds as a group is _____ compared with other halogenated compounds.
After ______ the servicing of R-22-based systems will rely on recycled refrigerants
The _______ of an oil is the temperature at which wax in the oil begins to precipitate from a mixture of 90% refrigerant and 10% oil by volume:
The solubility of the water in the commonly used refrigerants is high
