Topics: All categories in the pool
1: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
- When there are sprinklers above
- When its white
2: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- quarterly
- annually
- regularly
- bi-annually
3: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 600F
- 1000F
4: How far from the ground does a relief valve need to be?
- At least 15' above grade
- At least 25' above grade
- At least 20' above grade
- Not more than 3' above grade
5: The best way to determine the voltage requirement for an electrical component is to
- check with the utility company
- determine the capacity of the service panel
- read the voltage with a mulitmeter
- read the nameplate data
6: In an air conditioning system, the unit of total heat energy content in an air/vapor mixture is
- Specific heat
- Latent heat
- Sensible heat
- Enthalpy
7: Which winding have the most turns?
- Start
- depends on the motor phase
- they have equal amount of turns
- run
8: What type of oil is used in R-410A systems?
- naphthene
- mineral oil
- polyolester (POE)
- polyalkylene glycol (PAG)
9: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
10: "E" references ____ in the Ohm's law formula
- voltage
- resistance
- capacitance
- amperage
11: A secondary coolant is defined as
- any refrigerant direcly in contact with the cooling space for process cooling
- a low temperature refrigerant used for cascading systems
- a combination of interconnected parts from a closed circuit in where fluid is circulated for the purpose of cooling for a refrigeration system.
- any liquid used for the transmission of heat without a change of state in A/C refrigeration systems having flash point above 150F
12: The solution that is pumped into the concentrator in an absorption chiller is referred to as the
- absorbed solution
- concentrated solution
- weak solution
- strong solution
13: The outer portion of shell of the compressor used on low-pressure chillers is called the
- baffle
- volute
- nozzle
- suction
14: Megaohm meters can detect a ground in the
- up to 10,000 ohms
- 10,000,000 ohms or higher
- up to 1,000 ohms
- up to 1,000,000 ohms
15: Relief valves are rated in
- gallons of water per hour
- gallons of water per minute
- pounds of air per minute
- pounds of air per hour
16: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Temperature limiter device
- Circuit Breaker
- Relief valve
17: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 100
- 330
- 150
18: Sublimation occurs when
- gas is formed directly from a solid
- liquid is formed from a gas
- ice melts and turns to water
- gas is formed from a liquid
19: If a purge unit fails on a low pressure chiller, what are the symptoms?
- low pressure chillers do not have purge units
- increased capacity
- high head pressure
- low suction pressure
20: Ammonia is under what safety classification?
- A3
- B2
- B3
- B1
21: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- insulated
- leak checked
- moisture barrier
22: 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
- safe access
- service manuals
23: 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
24: The Department that certifies the transportation of refrigerant is the
- EPA
- DOT
- EPO
- RSES
25: Gauge pressure is
- what a gauge reads when checking pressures on a chilled water system.
- atmospheric pressure
- absolute pressure
- force of pressure above that of atmospheric