Topics: All categories in the pool
1: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
2: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
3: 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
4: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 40'
- At least 30'
- There is no minimum for relief valve and windows.
- At least 20'
5: Low pressure chiller systems use what type of compressor?
- Reciprocating
- Screw
- Scroll
- Centrifugal
6: Heat transferred by conduction from one body to another is done via:
- gas
- liquid
- solid
- All of the above
7: How is bring measured?
- hydrometer
- anemometer
- manometer
- hygrometer
8: To determine the pump size needed for an open cooling tower system, the following must be known,
- GPM and balanced head and friction head
- GPM and unbalanced head and friction head
- GPM, pipe size, and equivalent head.
- GPM and friction head
9: A relief valve shall be located at least ___ above grade.
- 36'
- 10'
- 15'
- 25'
10: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the aggregate of the high side and low side
- the high side
- the low side
- 2.5 times the design pressure
11: R-123 belongs to Group
- B-2
- A-3
- B-3
- B-1
12: A split-phase motor has a ______ winding and a ____ winding
- run, common
- duel-run, duel-start
- run, start
- start, common
13: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 25
- 20
- 10
- 15
14: What does an anemometer measure?
- voltage
- amperage
- temperature
- velocity
15: "P" represents ______ in the Watt's law formula
- voltage
- amperage
- reactance
- watts
16: "E" represents _____ in the Watt's law formula.
- amperage
- voltage
- reactance
- watts
17: What device measures the specific gravity of a substance?
- Hygrometer
- Hydrometer
- Thermometer
- Manometer
18: A High-Probablity 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 failed connections will enter the unoccupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
19: Copper and its alloys shall not be used with ammonia
- True
- False
20: If two 500 ohm resistors are connected in series, the resistance will be
- 20 ohms
- 500 ohms
- 1000 ohms
- 200 ohms
21: A movie theater would be considered a
- institutional occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
22: A crankcase heater has a supplied voltage of 100 volts and is drawing 1.4 amps. What is the resistance?
- 80 ohms
- 71 ohms
- 104 ohms
- 27 ohms
23: It takes how many BTU/hr to melt one pound of ice at 32F
- 144
- 970
- 212
- 180
24: What percentage of amperage difference is allowable phase to phase on a HVAC circuit phased to phase?
- 1%
- 25%
- 2%
- 4%
25: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above