Topics: ASHRAE/CMR
1: What is an egress?
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
- An escape route
- A code violation
2: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
3: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
4: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 75%
- 90%
- 80%
5: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Classifed
- Leak checked
- Insulated and installed in a pipe duct (Encased)
6: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 99%
- 90%
- 75%
7: What must be done if refrigeration lines pass through a concrete floor?
- moisture barrier
- installed through a pipe casing
- leak checked
- insulated
8: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
9: How are refrigerant blends classified?
- Based on the oil used
- Blends don't have to be classified
- Based on best case Fractionation
- Based on worst case fractionation
10: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
11: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class T machinery room
- Class A machinery room
- Class M machinery room
- Class B machinery room
12: Which occupancy can ammonia be used in?
- redifential
- depends on the quantity of freon
- industrial
- commercial
13: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
14: A declaration test is needed when the system contains more than
- 65 lbs
- 55 lbs
- 110 lbs
- 120 lbs
15: Stop valves shall not be permitted between the system and the
- relief valve
- condenser
- service valve
- bleed valve
16: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.25'
- 9.00'
- 8'4"
- 7.00'
17: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-2
- A-1
- B-1
- B-2
18: 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
19: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
20: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Inspected
- Pressurized
- Insulated
21: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- color codes
- requirements for commercial, industrial, and residential occupancies
22: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
23: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- no flames shall be permitted
- gas masks must be worn
- explosion precautions must be taken
24: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall not be used for air condition for human comfort
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
25: 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
- 100
- 80
- 90