Topics: ASHRAE/CMR
1: Pipe identification labels are required when the system contains more than
- 110 lbs
- 120 lbs
- 55 lbs
- 65 lbs
2: 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.
3: High pressure controls should be set no higher than
- 10% of set point
- 90% of set point
- 25% of set point
- 80% of set point
4: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
5: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
6: What kind of material can't be used on the outlet of a relief valve?
- Copper
- Stainless Steel
- Aluminum
- PVC
7: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-1
- A-2
- B-2
8: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 15 CFM
- 5 CFM
- 20 CFM
9: What is a Category "M" fluid?
- A typical refrigerant used on newer air conditioning and heat pump systems
- 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
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
10: A restaurant is classified as a
- mixed occupancy
- large mercantile occupancy
- commercial occupancy
- public assembly occupancy
11: What is an egress?
- An escape route
- A code violation
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
12: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- low pressure
- critical pressure
- high pressure
13: All serviceable components of a refrigeration system shall be provided with
- service manuals
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
14: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
15: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 22
- 25
- 50
16: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- industrial
- redifential
- commercial
17: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- commercial occupancy
- public assembly occupancy.
- mercantile occupancy
18: 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
19: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
- Approved by the installing contractor
- Never can be allowed
20: The Department that certifies the transportation of refrigerant is the
- DOT
- RSES
- EPA
- EPO
21: Which refrigerant class listed below is the most flammable?
- C3
- A2
- B2
- A3
22: 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)
- institutional occupancy
- commercial occupancy
- illegal occupancy
- public assembly occupancy
23: 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.
- “UM” and “UV”
- “UV”
- “UL”
- “U” or “UM”
24: Can you use Ammonia in industrial applications?
- No, never
- Yes, Under certain condidtions
- Yes, always
- When mixed with R-718
25: R-11 belongs to Group
- A-1
- B-3
- A-2
- B-1