Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: The gauge thickness required on a CO2 tank construction is
1/8"
1/16"
3/32"
5/16"
2: R-11 belongs to Group
B-1
B-3
A-1
A-2
3: 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.
350
400
250
100
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
R-22
R-12
R-11
R-113
5: A High-Probablity system
is such that a leak of refrigerant from failed connections will enter the unoccupied space
is such that any leak will cause injury or death to anyone within a 100 square foot area
is a system highly likely to leak from a failed connection or component of such system
is such that a leak of refrigerant from failed connections will enter the occupied space
6: What is an egress?
A valve put on the low side of the system to prevent frosting
An escape route
A code violation
An entrance or exit
7: 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
8: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
institutional occupancy
commercial occupancy
public assembly occupancy
illegal occupancy
9: Which refrigerant(s) is an HFC?
R-22
R-410A
R-502
All of the above
10: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
2.5
2.0
3.0
5.5
11: R-717 is
carbon dioxide
ammonia
trichloromethane
water
12: How much refrigerant can be stored in a mechanical room outside of the system?
100
150
330
200
13: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
fusible plug
relief valve
rupture disc
all of the above
14: The main purpose of a refrigerant detector in a machinery room is to
inform there is a refrigerant leak int he system
detect toxins in the air caused by a refrigerant leak
to set off an alarm when there is refrigerant present inside the room
all of the above
15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
100%
75%
90%
80%
16: What type of pressure relief device is used on a CO2 system?
Rupture disk
Fusible plug
Glove valve
Gate valve
17: The Board of Boilers adopts by reference
Montreal Protocol Safety Code
the 1997 ANSI/ASHRAE Safety Code
MSCA Code
the MACS Pressure Vessel Code of Massachusetts
18: How much clearance do you need around the perimeter of electrical panels?
36"
12"
18"
24"
19: 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
20: The discharge relief valve is located (9.4.6)
on top of the condensor
between the compressor and the stop valve
between the compressor and reciever
between the compressor and oil separator
21: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
place sign, check for leaks, insulate
nothing must be done
make sure it's compatible, notify owner, notify A.H.J
you can't change refrigerants
22: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
Class T machinery room
Class B machinery room
Class A machinery room
Class M machinery room
23: Pressure relief valves shall be marked with the data from
Section XIII Division of the ASME Boiler & Pressure Code
Section VIII Division of the ASME Boiler & Pressure Code
Section IV Division of the ASME Boiler & Pressure Code
Section I Division VIII of ASME Boiler & Pressure Code
24: When can recovered refrigerants be reused?
They can't
Only when used in original owner's equipment
Only if used in 30 days of recovery
None of the above
25: Name three things that must be done when changing refrigeration lubricant?
Make sure it's compatible, notify owner, notify AHJ