Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Single compound Refrigerants are classified by what two criteria?
Flammability and temperature range
Flammability and toxicity
Temperature range and hazardousness
Weight and color
2: A restaurant is classified as a
mixed occupancy
commercial occupancy
public assembly occupancy
large mercantile occupancy
3: A professional or office building would be considered what type of occupancy?
business
public assembly
mercantile
commercial
4: Which occupancy can ammonia be used in?
depends on the quantity of freon
redifential
commercial
industrial
5: Refrigerants shall be classified by
color codes
toxicity and flammability
maximum permissible quantities of each group
requirements for commercial, industrial, and residential occupancies
6: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
higher
lower
there is no Group B1 refrigerants
the same
7: The Department that certifies the transportation of refrigerant is the
RSES
DOT
EPA
EPO
8: The discharge relief valve is located (9.4.6)
between the compressor and the stop valve
between the compressor and reciever
on top of the condensor
between the compressor and oil separator
9: 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.
10: Ammonia (NH3) is a group III refrigerant
True
False
11: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
over pressure protection and a rupture disc
over pressure protection as well as a temperature protection device
over pressure protection
Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
12: Class 3 refrigerants are
highly flammable
non-toxic
non-flammable
toxic
13: Can you use Ammonia in industrial applications?
When mixed with R-718
No, never
Yes, Under certain condidtions
Yes, always
14: Evaporators within 18" of a heating coil must be equipped with a
pressure relief device
zone valve
high limit control
low limit control
15: _____ and its alloys are suitable for use with ammonia systems.
Aluminum
Magnesium
Zinc
Copper
16: 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
17: _____ alloys shall not be used in contact with an halogenated refrigerants.
Magnesium
Zinc
Copper
Nickel
18: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
Class A machinery room
Class T machinery room
Class B machinery room
Class M machinery room
19: What must be done to refrigerant pipes before being buried ?(8.10.4)
Certified
Leak checked
Insulated and installed in a pipe duct (Encased)
Classifed
20: What is the minimum size of the discharge pipe?
Same size as the outlet of the relief valve
One pipe size larger that the inlet of the relief valve
Depends on size of manifold
All of the above
21: What kind of material can't be used on the outlet of a relief valve?
Copper
Aluminum
PVC
Stainless Steel
22: Ammonia can come in contact with _______ ?
Aluminum
Copper
Brass
Copper tubing
23: 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
24: 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
25: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.