Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
the liquid side of the system
the vapor side of the system
low side of the system
high side of the system
2: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
400
350
100
250
3: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
True
False
4: What kind of material can't be used on the outlet of a relief valve?
Stainless Steel
PVC
Aluminum
Copper
5: 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
6: A Category D fluid
is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
is when the design pressure does not exceed 150 psi
a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
Both a and b are correct
7: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
R-22
R-11
R-12
R-113
8: How many different groups of refrigerants are there?
3
15
7
11
9: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
25
10
20
15
10: _____ alloys shall not be used in contact with an halogenated refrigerants.
Copper
Magnesium
Zinc
Nickel
11: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
24
10
15
18
12: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
CFC-11
Lithium bromide
ammonia
HCFC-123
13: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
over pressure protection
Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
over pressure protection as well as a temperature protection device
over pressure protection and a rupture disc
14: What does safe access mean?
Well-lit exit signs
A clear unobstructed path to the equipment and controls
OSHA approved
Locked doors
15: A machine room with a refrigerant system using ammonia shall
be provided with a continuously operated ventilation system
be considered a non-hazardous location in accordance with National Electrical code
have no flame producing apparatus permanently installed and operated
All of the above
16: What is the minimum height refrigeration piping should be placed against walls?
72"
6'
Ceiling height
7.25'
17: _____ and its alloys are suitable for use with ammonia systems.
Aluminum
Magnesium
Copper
Zinc
18: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
550
100
50
350
19: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
Make sure its compatible, notify owner, and notify AHJ.
Place sign, check for leaks, and insulate suction line
you can never change refrigerants
Nothing must be done
20: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
A group sensing
phosgene gas sening
CO Sensing
refrigerant sensing
21: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
the mechanical room housing the refrigeration system
the return air ducted system
the outdoors
Machinery rooms need not be vented
22: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
True
False
23: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
24: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
of Group B2 refrigerant shall be prohibited
shall be prohibited
containing R-11, R-123 & R-717 exclusively shall not be prohibited
shall not be prohibited
25: When a refrigerating machinery room is used, the emergency procedures shall be posted
on a conspicuous card located near the compressor
on a conspicuous card located near the evaporator
inside the room, immediately adjacent to each door
outside the room, immediately adjacent to each door