Topics: ASHRAE/CMR
1: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 90%
- 80%
- 75%
- 99%
2: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- self-closing doors
- automatic ventilation
- tight fitting doors
3: What section governs pressure vessels?
- OSHA
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
4: A class B1 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic but non-flammable
- non-toxic but highly flammable
5: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
- Trucks, invoices, and advertising
6: What would be the classification for Stop & Shop grocery store?
- Place of assembly
- Industrial
- Large mercantile
- Instituional
7: The color code of a tank of ammonia is
- white
- silver
- lavender
- light green
8: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- Ceiling height
- 6'
- 72"
9: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
10: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- the low side
- the aggregate of the high side and low side
- 2.5 times the design pressure
11: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- industrial
- redifential
- commercial
12: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-12
- R-134A
- R-22
13: What do you need to do when you install a new system?
- Insulate the suction line before you take a superheat reading
- Have it inspected
- Add refrigerant
- Document the superheat and subcooling reading
14: Ammonia (NH3) is a group III refrigerant
- True
- False
15: A declaration test is needed when the system contains more than
- 110 lbs
- 55 lbs
- 65 lbs
- 120 lbs
16: Refrigerants shall be classified by
- color codes
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
17: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- welder qualified
- licensed technician
- licensed welder
- competent welder
18: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
19: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When its white
- When there is a space 6' or more above it
- When there are sprinklers above
20: Stop valves shall not be permitted between the system and the
- relief valve
- condenser
- service valve
- bleed valve
21: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Leak checked
- Certified
- Insulated and installed in a pipe duct (Encased)
22: 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.
- 25
- 10
- 15
- 20
23: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Contractor who last serviced the system.
- Board of Boilers
- Person in charge of the facility
24: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- Lithium bromide
- HCFC-123
- CFC-11
- ammonia
25: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
- Yes, always