Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: How many different groups of refrigerants are there?
3
15
7
11
2: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
low pressure
high pressure
critical pressure
design pressure
3: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
quarterly
annually
bi-annually
regularly
4: What must be done to refrigerant pipes before being buried ?(8.10.4)
Certified
Insulated and installed in a pipe duct (Encased)
Leak checked
Classifed
5: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
When it's cold out
When there is a malfunction on the high side
When its warm out
All of the above
6: High pressure controls should be set no higher than
90% of set point
80% of set point
25% of set point
10% of set point
7: 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 and a rupture disc
over pressure protection as well as a temperature protection device
8: A class A3 refrigerant is considered
non-toxic and non-flammable
toxic and non-flammable
non-toxic but highly flammable
toxic and somewhat flammable
9: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
10: How much clearance do you need around the perimeter of electrical panels?
18"
24"
12"
36"
11: Who approves containers for refrigerants?
D.O.E
E.P.A
D.O.T
D.O.D
12: What was the main reason for enacting the no venting rule of July 1, 1992?
Ozone depletion
Green house effect
Global warming potential
All of the above
13: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
330 lbs
500 lbs
660 lbs
55 lbs
14: How many refrigerant classifications are there for toxicity?
3
5
1
2
15: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
16: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
business occupancy
public assembly occupancy.
commercial occupancy
mercantile occupancy
17: What is the intention of the word “should” as used in the code?
A mandatory requirement
A recommendation or advisory guideline
A technician’s choice of how it should be done
None of the Above
18: 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
high side of the system
low side of the system
19: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
lower
the same
there is no Group B1 refrigerants
higher
20: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
gas masks must be worn
explosion precautions must be taken
the owner shall be informed
no flames shall be permitted
21: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
22: What type of material can't be used on the outlet of a relief valve?
Copper
Stainless steel
PVC
Magnesium alloy
23: What is an egress?
A valve put on the low side of the system to prevent frosting
An entrance or exit
A code violation
An escape route
24: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
1,000
10,000
100
100,000
25: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
When there is a space 6' or more above it
When it's used as part of a supply or return air system