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CARO BOOK QUESTION WITH COMPLETE SOLUTIONS,ALREADY GRADED A+
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CARO BOOK QUESTION WITH COMPLETE SOLUTIONS,ALREADY GRADED A+
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Name: Score:119 Multiple choice questions
Term 1 of 119
Specific heat
Is greater if the substance requires more heat energy to increase the temperature
Is less than the substance requires more heat energy to increase temperature
Is 1 BTU/lb/ degree Fahrenheit for all substances
Is related to change of state, not temperature change of a substance
Term 2 of 119
What are the three types of positive displacement compressors used in refrigeration systems
Piston, reciprocating, rotary screw
Reciprocating, rotary vane, rotary screw
Screw, piston, hermetic
Reciprocating, vane, piston
Term 3 of 119
Which one of the following statements is correct?
Oil is heavier than liquid ammonia
Oil is lighter than liquid ammonia
Oil and liquid ammonia mix in proportion
Oil separators always remove 100% of the oil from ammonia
,Term 4 of 119
Pressure is a measure of
The action seen from the attraction of gravity
Weight
The relationship of a force being applied over a given area
The distance between the top of the post on and the discharge valve of a reciprocating
compressor
Term 5 of 119
Gravity flooded evaporators
Utilize a pump to move the liquid to the evaporator.
Are always top feed.
As compared to other evaporator feed types are relatively inexpensive to install.
Provide the maximum heat transfer for a given evaporator size.
Term 6 of 119
How does the refrigeration compressor maintain the temperature in the system evaporators
Drawing out vaporized refrigerant at a rate to maintain the desired evaporating pressure
Increasing pressure
By using liquid injection or thermo-siphon cooling
Compressors do not maintain evaporator temperatures
,Term 7 of 119
Most oil separators for screw compressors are multi/stage separators. The number of steps is
1
4
5
10
Term 8 of 119
Which of the following is a danger of slugging in a compressor
Excessive suction superheat
Condenser flooding and high condensing pressure
Low evaporator temperature
Serious damage to the compressor and refrigerant loss
Term 9 of 119
What kind of measure is a ton of refrigeration
An amount in pounds
A rate of heat transfer in BTUs per unit of time
A quantity in BTUs
A measure of energy in BTUs per pound
Term 10 of 119
Coalescing elements are used in oil separators to
Clarify the oil
Restore the oil viscosity
Reduce the oil smoke from the discharge gas
, Term 11 of 119
What is the freezing point of water
32F 0C
pressure difference
D. To maintain a temperature
The rate of moving 288,000 BTU per 24 hours
Term 12 of 119
How can the exact point of a leak be found in the ammonia system
A Smell
B Watery eyes
C Halide torch
D A burning sulfur stick
10 PSIG is greater pressure than 10 PSIA
A burning sulfur stick
C In both evaporator and condenser
By increasing rpm and the number of cylinders
Term 13 of 119
Frost build-up on the surface of air coolers
Increases circulation because it is slipperier
Makes the room colder
Reduces heat transfer into the coil
Cleans the coil
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