Topics: ASHRAE/CMR
1: What refrigerant doesn't have to be classifted?
- R-134a
- R-717
- R-711
- R-718
2: What would be the classification of a prison?
- Institutional
- Place of assembly
- Industrial
- Large mercantile
3: What is an egress?
- A valve put on the low side of the system to prevent frosting
- An escape route
- An entrance or exit
- A code violation
4: What kind of material can't be used on the outlet of a relief valve?
- Aluminum
- Copper
- PVC
- Stainless Steel
5: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- Pounds of air per minute.
- PSIG
6: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 3.0, 3.5
- 6.6, 6.6
- 2.5, 2.5
- 2.5, 3.0
7: What is R-22?
- Chlorofluoromethane
- CCFCM
- HFC
- Chlorodifluoromethane
8: 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
9: No open flames are allowed in the machinery room unless?
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
- Approved by the installing contractor
- Approved by the authorized person
10: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 600F
- 1000F
- 700F
11: Which refrigerant class listed below is the most flammable?
- A-1
- C-3
- A-3
- B-2
12: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
13: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 1
- 2
- 3
- 5
14: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
- either a fusible plug or a pressure relief device
15: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
16: What must be done to refrigerant pipes before being buried?
- Encased
- Coated
- Certified
- Leaked checked
17: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 40'
- At least 20'
- At least 30'
18: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UL”
- “U” or “UM”
- “UV”
- “UM” and “UV”
19: The color code of a tank of ammonia is
- silver
- lavender
- white
- light green
20: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- illegal occupancy
- institutional occupancy
- commercial occupancy
- public assembly occupancy
21: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
22: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Pressurized
- Insulated
- Leak tested
23: What is a Category "D" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
24: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Relief valve
- Temperature limiter device
- Circuit Breaker
25: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- quarterly
- regularly
- bi-annually