Topics: ASHRAE/CMR
1: 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.
- 10
- 20
- 25
- 15
2: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- lower
- higher
- there is no Group B1 refrigerants
3: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- the liquid side of the system
- the vapor side of the system
- low side of the system
4: Halogenated refrigerants cannot be used with what material?
- Stainless steel
- Copper
- Magnesium alloy
- Aluminum
5: 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
6: Large mercantile occupancy is
- 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
- 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
7: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
8: 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.
- 50
- 15
- 75
- 55
9: Which refrigerant class listed below is the most flammable?
- C3
- A3
- A2
- B2
10: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
11: What is an example of institutional occupancy?
- Football stadium
- Dorms
- Hospital
- Shopping mall
12: 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
13: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 600F
- 1000F
14: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
15: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 10,000
- 100
- 100,000
16: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 25'
- 30'
- 15'
17: How many gallons of water per pound of ammonia do you need?
- 20
- 5
- 1
- 15
18: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Nickel
- Zinc
- Magnesium
- Copper
19: The color code of a tank of ammonia is
- white
- light green
- silver
- lavender
20: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-134A
- R-123
- R-11
21: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- OSHA
- Department of Energy
- ASHREA-15 Section 9.2.1
22: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 350
- 400
- 250
- 100
23: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection
- over pressure protection and a rupture disc
24: 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
25: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F