Topics: ASHRAE/CMR
1: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 75
- 15
- 50
- 55
2: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
3: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 350
- 50
- 550
4: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- public assembly occupancy.
- business occupancy
- commercial occupancy
5: How many groups of refrigerants are there?
- 3
- 1
- 7
- 5
6: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-123
- R-11
- R-134A
7: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
8: Machinery rooms must be vented to ______?
- neutralizing tank
- unoccupied spaces
- basement
- outdoors
9: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
10: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
11: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
12: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
13: When should a relief valve start to function?
- Before the purge station discharges
- 10 psi before it's set pressure
- At it's set pressure
- Two times it's working pressure
14: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 25' above grade
- At least 20' above grade
- At least 15' above grade
15: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 72"
- 7.25'
- 6'
16: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
17: 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
18: How many refrigerant classifications are there for flammability?
- 1
- 3
- 2
- 7
19: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Gate valve
- Rupture disk
- Fusible plug
20: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 25'
- 15'
21: Liquid level gauges must be provided with what?
- A low level mark
- A relief valve
- Automatic shut-offs
- A red line
22: All electrical work done on refrigeration systems must comply with
- OSHA
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- Department of Energy
23: A Low-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
24: Can ammonia be used on domestic system?
- yes
- yes, for systems under 10 tons
- no
- no, unless there is proper ventilation system installed
25: R-22 falls under which safety classification?
- B-1
- B-2
- A-2
- A-1