Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: 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
containing R-11, R-123 & R-717 exclusively shall not be prohibited
shall be prohibited
shall not be prohibited
2: R-717 is
carbon dioxide
water
ammonia
trichloromethane
3: What type of pressure relief device is used on a CO2 system?
Rupture disk
Fusible plug
Gate valve
Glove valve
4: What refrigerant were phased out in 2004?
R-11
R-134a
R-12
R-22
5: 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
6: How much clearance do you need around the perimeter of electrical panels?
24"
18"
12"
36"
7: 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.
20
15
10
25
8: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
75%
100%
90%
80%
9: A declaration test is needed when the system contains more than
120 lbs
110 lbs
65 lbs
55 lbs
10: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
2.5, 3.0
6.6, 6.6
3.0, 3.5
2.5, 2.5
11: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
12: Halogenated refrigerants cannot be used with what material?
Stainless steel
Aluminum
Magnesium alloy
Copper
13: The Department that certifies the transportation of refrigerant is the
RSES
DOT
EPO
EPA
14: All electrical work done on refrigeration systems must comply with
Department of Energy
NEC and Massachusetts Modifications
ASHREA-15 Section 9.2.1
OSHA
15: When a refrigerating machinery room is used, the emergency procedures shall be posted
outside the room, immediately adjacent to each door
on a conspicuous card located near the compressor
inside the room, immediately adjacent to each door
on a conspicuous card located near the evaporator
16: R-11 belongs to Group
B-3
B-1
A-1
A-2
17: 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 15' above grade
At least 25' above grade
18: Direct systems using Group II refrigerants
shall be allowed to be used for human comfort.
shall not be used for air condition for human comfort
shall be installed per instruction of the AHJ
shall be installed in Class T machinery rooms
19: The discharge relief valve is located (9.4.6)
between the compressor and oil separator
between the compressor and reciever
between the compressor and the stop valve
on top of the condensor
20: What is an egress?
An escape route
A code violation
An entrance or exit
A valve put on the low side of the system to prevent frosting
21: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
True
False
22: A hotel is considered a _______ occupancy.
mercantile
commercial
residential
institutional
23: High pressure controls should be set no higher than
80% of set point
10% of set point
25% of set point
90% of set point
24: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
25: Can you use Ammonia in industrial applications?