Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What type of copper is not permitted on refrigeration systems?
Type L
Type M
Type N
Type K
2: How many CFMs are required per square foot of commercial office occupied space
15 CFM
.5 CFM
20 CFM
5 CFM
3: How are refrigerant blends classified?
Based on best case Fractionation
Based on the oil used
Blends don't have to be classified
Based on worst case fractionation
4: When a refrigeration or air conditioning system is installed
the form of certificate shall be authorized by the Department of Pubic safety
it shall not be operated below prescribed pressures
a field inspection shall be made before it is put into service
it shall be approved by the owner for proper operation.
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: The main cause of enacting the "no vending rule" of July 1st 1992 was
global warming potential
ozone depletion
both a & b
None of the above
7: How far from the ground does a relief valve need to be?
At least 25' above grade
At least 15' above grade
Not more than 3' above grade
At least 20' above grade
8: Which refrigerant replaced R-12?
R-134A
R-22
R-407A
R-410A
9: Can you use Ammonia in industrial applications?
When mixed with R-718
No, never
Yes, Under certain condidtions
Yes, always
10: What type of pressure relief device is used on a CO2 system?
Rupture disk
Fusible plug
Gate valve
Glove valve
11: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
refrigerant sensing
phosgene gas sening
CO Sensing
A group sensing
12: Which occupancy can ammonia be used in?
depends on the quantity of freon
redifential
commercial
industrial
13: Pressure vessels with an internal volume of 3 cubic feet or more
shall use pressure relief devices or fusible plugs
do not need pressure relief protection
shall use pressure relief devices
shall use fusible plugs
14: Name three things that must be done when changing refrigeration lubricant?
Place sign, check for leaks, insulate
Make sure it's compatible, notify owner, notify AHJ
Nothing must be done
You can't change lubricants.
15: What is an egress?
A valve put on the low side of the system to prevent frosting
A code violation
An entrance or exit
An escape route
16: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
17: 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
3.0, 3.5
2.5, 2.5
6.6, 6.6
18: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
2 months
1 week
14 days
30 days
19: 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
20: A restaurant is classified as a
mixed occupancy
commercial occupancy
public assembly occupancy
large mercantile occupancy
21: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
Foot valve
Stop valve
Muffler
Moisture indicator
22: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
50
25
66
22
23: Pressure relief valves shall be marked with the data from
Section I Division VIII of ASME Boiler & Pressure Code
Section VIII Division of the ASME Boiler & Pressure Code
Section XIII Division of the ASME Boiler & Pressure Code
Section IV Division of the ASME Boiler & Pressure Code
24: What must be done to refrigerant pipes before being buried?
Encased
Coated
Leaked checked
Certified
25: Pressure vessels having an inside diameter of 6” or less shall be protected by
Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified