Topics: ASHRAE/CMR
1: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
2: 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.
- HCFC-123
- CFC-11
- Lithium bromide
- ammonia
3: High pressure controls should be set no higher than
- 10% of set point
- 80% of set point
- 90% of set point
- 25% of set point
4: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
5: A movie theater would be considered a
- mixed occupancy
- institutional occupancy
- public assembly occupancy
- commercial occupancy
6: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
7: What must be done to refrigerant pipes before being buried?
- Coated
- Encased
- Leaked checked
- Certified
8: Halogen refrigerants are corrosive to which type of metal?
- magnesium
- black iron
- copper
- stainless steel
9: 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
10: When should a relief valve start to function?
- Two times it's working pressure
- At it's set pressure
- Before the purge station discharges
- 10 psi before it's set pressure
11: Which refrigerant replaced R-12?
- R-134A
- R-22
- R-410A
- R-407A
12: 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
13: R-22 falls under which safety classification?
- A-2
- B-2
- A-1
- B-1
14: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on the oil used
- Based on best case Fractionation
- Blends don't have to be classified
15: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
16: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- CO Sensing
- phosgene gas sening
- A group sensing
- refrigerant sensing
17: 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
18: 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.
- 550
- 100
- 350
- 50
19: Name three things that must be done when changing refrigeration lubricant?
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
- Place sign, check for leaks, insulate
- Nothing must be done
20: Class T machine room
- has no flame producing apparatus permanently installed
- shall include closets used for setting equipment
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
21: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
22: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
23: Ammonia belongs to Group
- B-1
- A-1
- B-2
- A-2
24: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
25: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above