ch 6
Condenser Pressure
In an HVACR system, another name for high-side pressure, condenser pressure, and head pressure.
A vapor refrigerant is superheated if its temperature is the refrigerant's boiling point.
above
Low- pressure refrigerant has the potential to heat.
absorb
A reciprocating compressor uses one or more pistons that move in only one direction
false
A superheated vapor contains some refrigerant in liquid form.
false
All refrigeration systems must have accumulators to operate safely
false
Refrigerant in the form of low-pressure vapor has the highest capacity to absorb heat.
false
Refrigeration systems that use capillary tubes as refrigerant metering devices must have a liquid receiver in order to work properly.
false
Suction lines are generally smaller in diameter than liquid lines
false
The evaporation of a fluid is an indicator that pressure is being absorbed.
false
A condenser is a motor-driven device that removes heat-laden, low pressure vapor refrigerant from the evaporator.
false (compressor)
A liquid line filter-drier is installed in the low side of the system
false (high side)
A condenser without a fan is called a forced convection condenser
false (natural convection condesor/static condensor)
The instantaneous evaporation of liquid refrigerant when it enters the evaporator is called
flash gas
Which of the following is not a type of metering device used to control the flow of refrigerant ?
hermetic float
Heat is rejected out of a refrigeration system on the side of the system.
high
During normal operation, refrigerant pumped into a condenser is in the form of
high pressure vapor
A suction line should be to prevent molsture in the air from condensing on the cold tubing .
insulated
A compressor is designed to draw in refrigerant from the evaporator
low pressure vapor
A compressor is designed to draw in refrigerant from the evaporator.
low pressure vapor
the fins on an evaporator increase the of the evaporator tubing allowing increased heat transfer from the air to the tubing.
surface area
A condenser with a fan is called a forced-air condenser
true
A refrigeration system reaches operational balance when the number of vapor molecules that condense into liquid equals the number of vapor molecules that the compressor pumps into the condenser .
true
A refrigeration system reaches operational balance when the number of vapor molecules that condense into liquid equals the number of vapor molecules that the compressor pumps into the condenser.
true
A small amount of oil circulating throughout a refrigeration system is generally considered acceptable .
true
Fluids that are used to boil and absorb heat are called refrigerants.
true