Topics: ASHRAE/CMR
1: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 150
- 100
- 330
2: Who is permitted to access a refrigeration machine room?
- Anyone, it's a completely safe area
- Contractors only
- Authorized persons only
- Any employee
3: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
4: What refrigerant doesn't have to be classified?
- R-134A
- R-717
- R-718
- R-422A
5: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- licensed welder
- competent welder
- welder qualified
- licensed technician
6: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
- a field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressures
7: When should a relief valve start to function?
- Before the purge station discharges
- At it's set pressure
- Two times it's working pressure
- 10 psi before it's set pressure
8: What type refrigerant is NOT ozone depleting?
- HFC
- CFC
- Halon
- HCFC
9: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- ammonia
- HCFC-123
- Lithium bromide
10: Pipe identification labels are required when the system contains more than
- 55 lbs
- 65 lbs
- 120 lbs
- 110 lbs
11: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- PSIG
12: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
13: Ammonia is under what safety classification?
- B1
- B2
- B3
- A3
14: When must refrigeration system covered by the code be inspected?
- Not required
- Upon installation
- Annually and when installed
- Annually
15: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- commercial
- redifential
- industrial
16: 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
17: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
18: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Industrial
- Place of assembly
- Instituional
19: 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.
- 9.00'
- 8'4"
- 7.25'
- 7.00'
20: 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
21: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 600F
- 800F
- 700F
22: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
23: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
24: What type of material can't be used on the outlet of a relief valve?
- Copper
- Magnesium alloy
- PVC
- Stainless steel
25: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection and a rupture disc
- over pressure protection as well as a temperature protection device