Topics: All categories in the pool
1: A Low-Probability System
- 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 can not enter the occupied space
- 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 the occupied space
2: The certificate of inspection
- shall be posted on the compressor shell or electrical panel at the unit
- shall be authorized by a notarized insurance company
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
3: "I" represents ____ in the Ohm's law formula.
- voltage.
- resistance
- capacitance
- amperage
4: What is the intention of the word “shall” as used in the code?
- A mandatory requirement
- A recommendation or advisory guideline
- A technician’s choice of how it should be done
- None of the above
5: The best way to detect ammonia in brine is
- carbonation of soda
- CO2 gas
- nessler regaent
- potassium of line
6: The best way to determine the voltage requirement for an electrical component is to
- read the voltage with a mulitmeter
- determine the capacity of the service panel
- check with the utility company
- read the nameplate data
7: The formula for Pure Power in a resistance circuit is
- Watts X power factor
- Watts = volts X amps
- Watts X amps.
- Kw = volts X amps
8: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- the same
- there is no Group B1 refrigerants
- higher
9: Most CFC's are
- inert
- toxic
- inert but toxic
- flammable
10: If a refrigerant leaving the condenser is 94F and the condensing temperature is 105F, the subcooling is
- 21F
- 29F
- 11F
- 9F
11: A EPR valve is installed on what type of evaporators?
- high-temperature evaporators
- low-temperature evaporators
- plate evaporators
- shell and tube evaporators
12: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
13: 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.
- 550
- 100
- 350
- 50
14: Refrigerant restricted in 2004 but used for transition for decades:
- R-11
- R-22
- R-123
- R-134A
15: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-2
- B-1
- A-1
- B-2
16: What will occur if the strong solution in an absorption chiller becomes too strong?
- The machine will cool excessively as the solution evaporates
- The machine will cool excessively as the solution crystallizes.
- The machine will stop cooling and the solution will evaporate.
- The machine will stop cooling and solution will crystallize
17: When must refrigeration system covered by the code be inspected?
- Annually and when installed
- Not required
- Annually
- Upon installation
18: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
19: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- welder qualified
- licensed welder
- licensed technician
- competent welder
20: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- When mixed with R-718
- No, never
- Yes, always
21: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a fusible plug
- either a fusible plug or a pressure relief device
22: What is the leaving chilled water set point for water chiller systems?
- 66F
- 38F
- 45F
- 55F
23: What is the voltage of each leg to ground of a three-phase motor with a 460v supply voltage?
- 120v
- 240v
- 277v
- 208v
24: 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
25: What happens after your initial inspection of a pressure vessel?
- Notify the AHJ to let them know that the system been inspected
- Inspector leaves a metal tag with a certification listed on it
- 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.