Topics: ASHRAE/CMR
1: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 50
- 550
- 350
2: 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
3: 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
4: When a refrigeration or air conditioning system is installed
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
5: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
6: What type of relief valve is used on a CO2 system?
- gate valve
- rupture disc
- fusible plug
- glove disc
7: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
8: When a refrigerating machinery room is used, the emergency procedures shall be posted
- inside the room, immediately adjacent to each door
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- on a conspicuous card located near the evaporator
9: 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.
10: When must refrigeration system covered by the code be inspected?
- Not required
- Annually and when installed
- Annually
- Upon installation
11: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection as well as a temperature protection device
- over pressure protection
- over pressure protection and a rupture disc
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
12: 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
13: A High-Probability System
- 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 form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
14: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- 24 volt secondary side of the Class 2 transformer to the thermostat
- load-side of the contactor in
- breaker panel in
- first disconnect in
15: How many refrigerant classifications are there for flammability?
- 3
- 1
- 7
- 2
16: What does safe access mean?
- OSHA approved
- Locked doors
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
17: 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
18: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
19: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used for mechanical equipment only
- shall be used in refrigeration system less than 1,000 lbs
20: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Aluminum
- Copper
- Zinc
21: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
22: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
23: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- nothing must be done
- place sign, check for leaks, insulate
- make sure it's compatible, notify owner, notify A.H.J
24: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- 20 CFM
- 5 CFM
- .5 CFM
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