Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: _____ alloys shall not be used in contact with an halogenated refrigerants.
Copper
Nickel
Magnesium
Zinc
2: How far from the ground does a relief valve need to be?
Not more than 3' above grade
At least 20' above grade
At least 25' above grade
At least 15' above grade
3: NH3 is
R-718
ammonia
R-508A
lithium bromide
4: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
When it's cold out
When there is a malfunction on the high side
When its warm out
All of the above
5: What type of relief valve is used on low pressure centrifugal compressor systems?
Spring-loaded relief valve
Rupture disc
Purge relief
None of the above
6: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
3
1
2
5
7: Pipe identification labels are required when the system contains more than
55 lbs
120 lbs
110 lbs
65 lbs
8: The discharge relief valve is located (9.4.6)
between the compressor and reciever
on top of the condensor
between the compressor and oil separator
between the compressor and the stop valve
9: 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
10: Low temperature systems should have what?
High pour point
Low pour point
High viscosity
None of the above
11: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
When its white
When it's used as part of a supply or return air system
When there are sprinklers above
When there is a space 6' or more above it
12: The certificate of inspection
shall be posted on the compressor shell or electrical panel at the unit
shall be authorized by a notarized insurance company
shall be $20 and an additional fee of $1 for each tone above 20 tons
shall be posted and protected from dirt, water, and other elements
13: R-22 is considered a(n)
HFC
HCFC
HCFCH
CFC
14: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
True
False
15: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
welder qualified
licensed technician
licensed welder
competent welder
16: Halo-carbon refrigerants cannot be used with what material?
Copper
Stainless Steel
Magnesium alloy
Aluminum
17: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
1,000
6.6
110
330
18: R-22 is classified as a ____ refrigerant on the safety matrix.
B-2
A-2
B-1
A-1
19: What kind of material can't be used on the outlet of a relief valve?
Stainless Steel
Aluminum
Copper
PVC
20: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
22
50
33
18
21: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
fusible plug
relief plug
fusion plug
rupture plug
22: How many gallons of water per pound of ammonia do you need?
15
5
20
1
23: What must be done to all doors and access points in duct work going through a mechanical room?
Must be hindged
Must be screwed shut
Must be sealed and gasketed
All of the above
24: Stop valves shall not be permitted between the system and the