Topics: ASHRAE/CMR
1: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When there is a space 6' or more above it
- When it's used as part of a supply or return air system
- When there are sprinklers above
2: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 100,000
- 1,000
- 100
3: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 25' above grade
- At least 15' above grade
- At least 20' above grade
4: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
5: 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
6: Single compound Refrigerants are classified by what two criteria?
- Flammability and toxicity
- Flammability and temperature range
- Weight and color
- Temperature range and hazardousness
7: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class T machinery room
- Class A machinery room
- Class B machinery room
8: 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
9: 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.
- CFC-11
- Lithium bromide
- HCFC-123
- ammonia
10: All serviceable components of a refrigeration system shall be provided with
- manufactures instructions on start-up procedures
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- service manuals
- safe access
11: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- design pressure
- high pressure
- low pressure
12: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Nothing must be done
- Make sure its compatible, notify owner, and notify AHJ.
- Place sign, check for leaks, and insulate suction line
- you can never change refrigerants
13: A declaration test is needed when the system contains more than
- 110 lbs
- 65 lbs
- 120 lbs
- 55 lbs
14: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 3.0
- 2.0
- 2.5
15: How many gallons of water per pound of ammonia do you need?
- 1
- 5
- 15
- 20
16: Class 3 refrigerants are
- highly flammable
- non-toxic
- non-flammable
- toxic
17: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- 20 CFM
- 5 CFM
- .5 CFM
18: How many refrigerant classifications are there for flammability?
- 3
- 1
- 7
- 2
19: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- between the compressor and the stop valve
- on top of the condensor
- between the compressor and oil separator
20: A professional or office building would be considered what type of occupancy?
- commercial
- business
- mercantile
- public assembly
21: Ammonia is under what safety classification?
- B3
- A3
- B2
- B1
22: What happens after your initial inspection of a pressure vessel?
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
23: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
24: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 100
- 330
- 150
25: 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