Massachusetts Refrigeration Tech/Contractors practice quiz
Refrigeration RT/RC Prep Quiz
Topics: All categories in the pool
1: When energized, a normally open relay will be
depends on the type and class of the relay
noisy
open
closed
2: The difference between saturated liquid and saturated vapor is
volume
pressure
heat
temperature
3: What kind of material can't be used on the outlet of a relief valve?
Stainless Steel
PVC
Copper
Aluminum
4: What is the state of the refrigerant leaving the evaporator?
a high temperature subcooled liquid
low temperature superheated vapor
a high temperature superheated vapor
a low temperature subcooled liquid
5: The solution that leaves the concentrator in an absorption chiller is referred to as the
diluted solution
absorbed solution
strong solution
weak solution
6: Suction valve unloaders afford an effective means of
superheat control
evaporator control
capacity control
refrigerant control
7: A movie theater would be considered a
institutional occupancy
public assembly occupancy
mixed occupancy
commercial occupancy
8: Industrial occupancy is
a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
Both a and b are correct
9: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
10: A crankcase heater has a supplied voltage of 100 volts and is drawing 1.4 amps. What is the resistance?
71 ohms
80 ohms
27 ohms
104 ohms
11: How many refrigerant classifications are there for toxicity?
5
2
1
3
12: When can recovered refrigerants be reused?
They can't
Only when used in original owner's equipment
Only if used in 30 days of recovery
None of the above
13: A motor starter contains a thermal overload and a
transformer
solenoid
contactor
3-way relay
14: If a purge unit fails on a low pressure chiller, what are the symptoms?
low suction pressure
high head pressure
increased capacity
low pressure chillers do not have purge units
15: The main cause of enacting the "no vending rule" of July 1st 1992 was
global warming potential
ozone depletion
both a & b
None of the above
16: Gauge pressure is
Force of pressure above that of atmosphere
Barometric pressure
Absolute pressrue
Atmospheric pressure
17: Pi equals approximately
3.14
12,000
746
3.41
18: When the compressor is below the condensor
traps are not needed on this type of system
traps are needed on the discharge line
traps are needed on the oil return line
traps are needed on the suction line
19: What is an egress?
An escape route
A valve put on the low side of the system to prevent frosting
A code violation
An entrance or exit
20: A mixed occupancy occurs when two or more occupancies are located with the same building
true
false
21: 1 Watt = ______ BTU's?
12
3.412
7.216
4.482
22: An accumulator can be located between the
compressor and condenser
condenser and evaporator
first stage and second stage compressors
evaporator and compressor
23: Capacitors are rated in
micro-farads
kelvins
volt - amperes
megaohms
24: How would you know if there was a loss of crankcase pressure?
oil will foam
oil level will rise
oil will thicken
oil will thin out
25: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8