Topics: All categories in the pool
1: How many BTU's is produced by one watt of energy
- 1
- 2.57
- 3.00
- 3.41
2: The two float-type metering devices are the
- liquid float and the vapor float
- high-side float and the low-side float
- vapor float and the low-side float.
- liquid float and the low-side float
3: Fractionation occurs when
- the pressures decreases as the heat load decreases
- some of the blended refrigerant evaporates or condenses before the rest of the blend
- when a fraction of refrigerant is added as the full charge
- the pressures increase as the heat load increases
4: Ammonia systems use ____ pressure to adjust oil pressure
- air
- stream
- liquid
- discharge
5: Atmospheric pressure is equal to
- 29.92" Hg
- 14.7 psia
- 14.7 psig
- both a & b
6: Liquid level gauges must be provided with what?
- A low level mark
- A red line
- A relief valve
- Automatic shut-offs
7: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1
- 1.5
- 2.2
- 1.2
8: "E" references ____ in the Ohm's law formula
- capacitance
- voltage
- resistance
- amperage
9: What is the boiling point of refrigerant governed by?
- Condenser sub-cooling
- Compressor RPM's
- P&T relationship
- Evaporator temperature
10: What does safe access mean?
- Locked doors
- A clear unobstructed path to the equipment and controls
- OSHA approved
- Well-lit exit signs
11: 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
12: Two systems using separate refrigerants that are superimposed upon one another is called
- cascade
- booster
- single stage
- indirect
13: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 75%
- 80%
- 90%
14: What is NOT a positive displacement compressor.
- Reciprocating
- Centrifugal
- Scroll
- Rotary
15: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
16: A High-Probability 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 a failed connection will enter an unoccupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
17: What is an example of institutional occupancy?
- Hospital
- Football stadium
- Dorms
- Shopping mall
18: "I" represents _______ in the Watt's law formula.
- amperage
- reactance
- watts
- voltage
19: A class B1 refrigerant is considered
- toxic and somewhat flammable
- toxic but non-flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
20: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
21: Ammonia is under what safety classification?
- A3
- B2
- B1
- B3
22: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
23: R-410A can segregate in the system or chemically change its composition due to a leak.
- True
- False
24: Control systems can be classified by
- safety
- source of power
- economy of operation
- tonnage of system
25: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Uniforms, checks, and invoices.
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment