Topics: ASHRAE/CMR
1: Who authorizes changes to the safety codes?
- Board of Boilers
- Person who pulled the permit
- Contractor who last serviced the system.
- Person in charge of the facility
2: All electrical work done on refrigeration systems must comply with
- Department of Energy
- OSHA
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
3: Which refrigerant class listed below is the most flammable?
- C-3
- A-1
- B-2
- A-3
4: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
5: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 330 lbs
- 660 lbs
- 55 lbs
6: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there are sprinklers above
- When its white
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
7: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
8: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
9: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 100%
- 75%
- 90%
10: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 15
- 50
- 75
- 20
11: 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
12: A class B1 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic but non-flammable
- non-toxic but highly flammable
13: Stop valves shall not be permitted between the system and the
- condenser
- bleed valve
- service valve
- relief valve
14: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 25'
- 15'
15: What must be done to refrigerant pipes before being buried?
- Encased
- Leaked checked
- Coated
- Certified
16: What is Trichlorotrifluoromethane?
- R-13
- R-113
- R-11
- R-12
17: 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
- 20
- 10
- 15
18: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 25
- III
- 15
19: High pressure controls should be set no higher than
- 90% of set point
- 10% of set point
- 25% of set point
- 80% of set point
20: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
21: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
22: Most CFC's are
- inert
- flammable
- toxic
- inert but toxic
23: R-123 belongs to Group
- B-3
- A-3
- B-2
- B-1
24: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 30'
- At least 20'
- At least 40'
- There is no minimum for relief valve and windows.
25: How many refrigerant classifications are there for flammability?
- 2
- 1
- 7
- 3