Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: The discharge relief valve is located (9.4.6)
between the compressor and the stop valve
between the compressor and oil separator
between the compressor and reciever
on top of the condensor
2: Where are the three places that the discharge from an ammonia relief valve be piped?
To chemical neutralizing tank only
Underground, into drain, into mechanical room
Atmosphere, Tank containing water, where the AHJ indicates.
None of the above.
3: A High-Probability System
is such that any leak will cause injury or death to anyone within a 100 square foot area
is such that a leak of refrigerant from a failed connection will enter an unoccupied space
is such that a leak of refrigerant from a failed connection will enter the occupied space
is a system highly likely to leak form a failed connection or component of such system
4: How much refrigerant can be stored in a mechanical room outside of the system?
330
100
150
200
5: Pipe identification labels are required when the system contains more than
110 lbs
120 lbs
55 lbs
65 lbs
6: A relief valve discharge capacity is rated in
Pounds of air per minute.
temperature minus pounds of air per second divided by release rate squared
PSIA
PSIG
7: What type refrigerant is NOT ozone depleting?
HCFC
CFC
HFC
Halon
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: What is the refrigerant chlorodifluoromethane?
R-123
R-12
R-134a
R-22
10: Low temperature systems should have what?
High pour point
Low pour point
High viscosity
None of the above
11: Pressure vessels nameplate markings must be compliant with the
ASHRAE 34 Standards
CMR-588 & CMR-528
ASME Boiler and Pressure Vessel Code
All of the Above
12: R-123 belongs to Group
B-1
A-3
B-2
B-3
13: Where are the three places that the discharge from an ammonia relief valve be piped?
atmosphere, tank containing water, where the A.H.J. indicates
underground, into drain, into mechanical room
to chemical neutralizing tank only
none of the above
14: The gauge thickness required on a CO2 tank construction is
5/16"
3/32"
1/16"
1/8"
15: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
R-11
R-113
R-22
R-12
16: NH3 is
lithium bromide
R-508A
R-718
ammonia
17: There can be no airflow from an occupied space through a machine room unless what?
System is high velocity
System is ducted and sealed
Duct is not located in the ceiling
None of the above.
18: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
the outdoors
Machinery rooms need not be vented
the return air ducted system
the mechanical room housing the refrigeration system
19: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
20: How many gallons of water do you need per pound of ammonia?
10
100
50
1
21: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
True
False
22: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
1.2
1.5
2.2
1
23: When an inspection is needed, how often must it be done?
annually
every 24 months
every 36 months
every 18 months
24: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
When its white
When there are sprinklers above
When it's used as part of a supply or return air system