Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Fusible plugs shall not be used with pressure vessels of
15 cubic feet or more
3 cubic feet or more
15 square feet or less
3 cubic feet or less
2: What must be done if refrigeration lines pass through a concrete floor?
leak checked
insulated
installed through a pipe casing
moisture barrier
3: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
shall have a pressure limiting device installed on the high side of the system
shall be inspected by the Boiler of Inspectors bi-annually
does not require a pressure-limiting device
shall have a pressure limiting device and a pressure relief valve installed
4: The gauge thickness required on a CO2 tank construction is
1/16"
1/8"
3/32"
5/16"
5: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
fusible plug
rupture plug
fusion plug
relief plug
6: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
mixed occupancy
public assembly occupancy
institutional occupancy
commercial occupancy
7: What type of pressure relief device is used on a CO2 system?
Fusible plug
Glove valve
Rupture disk
Gate valve
8: When an inspection is needed, how often must it be done?
every 24 months
annually
every 36 months
every 18 months
9: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
True
False
10: 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
11: How many refrigerant classifications are there for flammability?
2
1
7
3
12: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
55 lbs
660 lbs
550 lbs
330 lbs.
13: R-22 falls under which safety classification?
B-1
A-2
A-1
B-2
14: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
the outdoors
the mechanical room housing the refrigeration system
Machinery rooms need not be vented
the return air ducted system
15: Low temperature systems should have what?
High pour point
Low pour point
High viscosity
None of the above
16: What is an egress?
An entrance or exit
An escape route
A code violation
A valve put on the low side of the system to prevent frosting
17: What section of ASHRAE-15 governs pressure vessels?
OSHA
Section 6 ASHRAE-34 ASME VIII unfired
Section 9 ASHRAE-15 ASME VIII unfired
Section 7 ASHRAE-15 ASME VIII fired
18: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
District Engineering Inspectors
Commissioned Inspectors
Master licensed Technician
both a or b
19: Name three things that must be done when changing refrigeration lubricant?
You can't change lubricants.
Make sure it's compatible, notify owner, notify AHJ
Place sign, check for leaks, insulate
Nothing must be done
20: What does safe access mean?
OSHA approved
Well-lit exit signs
A clear unobstructed path to the equipment and controls
Locked doors
21: Defined process piping by code CMR (528)
Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
Any piping in an industrial space
Any piping in an industrial or commercial space
All of the above
22: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
1
1.2
2.2
1.5
23: What is not a requirement of a Class T machine room?
Fire hose connected to the building fire protection system.
Tight fitting doors
Automatic ventilation
Self-closing doors
24: A class A3 refrigerant is considered
non-toxic and non-flammable
toxic and somewhat flammable
non-toxic but highly flammable
toxic and non-flammable
25: What must be done to refrigerant pipes before being buried?