Topics: ASHRAE/CMR
1: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 30'
- There is no minimum for relief valve and windows.
- At least 40'
- At least 20'
2: Who is permitted to access a refrigeration machine room?
- Contractors only
- Any employee
- Authorized persons only
- Anyone, it's a completely safe area
3: What is R-22?
- HFC
- CCFCM
- Chlorodifluoromethane
- Chlorofluoromethane
4: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
5: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
6: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- 6'
- 7.25'
- Ceiling height
7: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- compressor
- evaporator
- outside the machinery room
- boiler
8: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
9: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Insulated and cross broke
- Welded and seamed.
- Ducted and sealed
10: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Magnesium alloy
- Copper
- PVC
11: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
12: Class 3 refrigerants are
- highly flammable
- non-toxic
- non-flammable
- toxic
13: A High-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 an unoccupied space
- 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
14: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 90%
- 100%
- 75%
- 80%
15: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- 2.5 times the design pressure
- the low side
- the aggregate of the high side and low side
16: Ammonia (NH3) is a group III refrigerant
- True
- False
17: A professional or office building would be considered what type of occupancy?
- business
- public assembly
- commercial
- mercantile
18: What pipe can not be used for refrigeration?
- M
- K
- N
- L
19: What would be the classification of a prison?
- Large mercantile
- Institutional
- Industrial
- Place of assembly
20: 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
21: The discharge relief valve is located (9.4.6)
- between the compressor and oil separator
- on top of the condensor
- between the compressor and reciever
- between the compressor and the stop valve
22: A relief valve shall be located at least ___ above grade.
- 36'
- 10'
- 25'
- 15'
23: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
24: 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 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
- 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.
25: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code