Topics: ASHRAE/CMR
1: A class A3 refrigerant is considered
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
- toxic and non-flammable
2: Most CFC's are
- flammable
- toxic
- inert
- inert but toxic
3: High pressure controls should be set no higher than
- 80% of set point
- 10% of set point
- 25% of set point
- 90% of set point
4: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
5: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
6: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
7: How many groups of refrigerants are there?
- 5
- 7
- 3
- 1
8: Halo-carbon refrigerants cannot be used with what material?
- Copper
- Magnesium alloy
- Aluminum
- Stainless Steel
9: R-123 belongs to Group
- A-3
- B-3
- B-2
- B-1
10: What is an example of institutional occupancy?
- Hospital
- Dorms
- Shopping mall
- Football stadium
11: The Board of Boilers adopts by reference
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
- Montreal Protocol Safety Code
- MSCA Code
12: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
13: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-12
- R-134A
- R-22
14: What is R-22?
- CCFCM
- Chlorodifluoromethane
- Chlorofluoromethane
- HFC
15: Class 3 refrigerants are
- toxic
- non-toxic
- highly flammable
- non-flammable
16: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-1
- B-2
- A-2
17: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
18: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on the oil used
- Based on worst case fractionation
- Based on best case Fractionation
19: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
20: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- industrial
- redifential
21: Joints in refrigeration piping must be _____ before being covered?
- Pressurized
- Inspected
- Leak tested
- Insulated
22: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
23: 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
24: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- CO Sensing
- refrigerant sensing
- phosgene gas sening
- A group sensing
25: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial