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Refrigerants are desired to have ____ freezing point:
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At the dew point temperature, dry bulb temperature is _____ wet bulb temperature:
The flash point of a transfer fluid in a hydronic piping system shall be a minimum of _______ degrees above the maximum system operating pressure.
The capacity of an expansion valve is determined by which if the following:
Cool vapor flows in which of the following in a refrigeration system:
Refrigerants with ______ specific volume at a given suction pressure and temperature will require higher compressor displacement:
Free moisture / water reacts with refrigerants at _______ temperature which attacks the system components and causes corrosion:
Refrigerants with ______ specific volume at a given suction pressure and temperature will require higher compressor displacement
A dense _____ smoke forms when the ammonia comes in contact with the sulfur dioxide
Which of the following helps in maintaining the pressure difference between the high-pressure (condenser) and low-pressure (evaporator) sides of the refrigeration system
Centrifugal compressor cannot be coupled to direct expansion coil systems:
_____ is the weight of the moisture in the unit mass of dry air:
The refrigerant velocity inside a pipe depends on which of the following:
When refrigerant absorb a high amount of moisture corrosive acids will be formed:
Which of the following refrigerant have higher efficiency during longer run:
The expansion device is typically located at the end of the ______ :
The amount of the heat that the condenser rejects is always _____ than the heat removed in the evaporator:
Dielectric strength is an indicative of moisture content in the refrigerant
Pilot Solenoid valve is a three way valve. Two valves are connected to suction lines and liquid line respectively. Third valve is connected to _______
What is the function of a heat anticipator wire in the thermostat?
Inside the condenser or in the liquid line, when liquid is sub-cooled, then there is no change in pressure:
The _____ reading on a psychrometric chart shows the total heat content of a pound of air.
Oxygen will explode when it comes into contact with oil
The addition or removal of heat to the air without any change in the moisture content results in change in which of the following:
Thermodynamic performance of simple CO2 cycle is _____ than HFCs
The _______connects the evaporator to the compressor
For large hp motor, the number of starts are restricted to _____ per hour:
Ozone layer is present in which of the following layers of earth:
The secondary refrigerants or brines may undergo change of state in refrigeration system:
The use of gypsum boards to form plenums shall be limited to systems where the temperatures do not exceed __________ degrees.
