Topics: ASHRAE/CMR
1: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
2: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
3: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- critical pressure
- high pressure
- low pressure
4: 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
5: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 30 days
- 1 week
- 14 days
6: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- make sure it's compatible, notify owner, notify A.H.J
- place sign, check for leaks, insulate
- you can't change refrigerants
- nothing must be done
7: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
8: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
9: Refrigerants shall be classified by
- requirements for commercial, industrial, and residential occupancies
- maximum permissible quantities of each group
- toxicity and flammability
- color codes
10: Who is permitted to access a refrigeration machine room?
- Authorized persons only
- Anyone, it's a completely safe area
- Any employee
- Contractors only
11: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on best case Fractionation
- Blends don't have to be classified
- Based on the oil used
12: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 550 lbs
- 330 lbs.
- 55 lbs
- 660 lbs
13: What is not a requirement of a Class T machine room?
- Fire hose connected to the building fire protection system.
- Self-closing doors
- Tight fitting doors
- Automatic ventilation
14: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- 7.25'
- Ceiling height
- 6'
15: Ammonia belongs to Group
- B-2
- B-1
- A-2
- A-1
16: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 110
- 80
- 100
- 90
17: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- explosion precautions must be taken
- the owner shall be informed
- gas masks must be worn
- no flames shall be permitted
18: A professional or office building would be considered what type of occupancy?
- business
- public assembly
- mercantile
- commercial
19: What is the refrigerant chlorodifluoromethane?
- R-12
- R-123
- R-134a
- R-22
20: 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
21: What type refrigerant is NOT ozone depleting?
- HCFC
- HFC
- Halon
- CFC
22: 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 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
- 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.
23: What is Trichlorotrifluoromethane?
- R-11
- R-12
- R-113
- R-13
24: What is an example of institutional occupancy?
- Football stadium
- Hospital
- Shopping mall
- Dorms
25: How many flammability classifications are refrigerants in?
- 3
- 7
- 2
- 5