Which section of the CEC deals with installation of heating units
Section 12
Section 16
Section 46
Section 62
A BTU is
Heat energy required to raise the temperature of a litre of water 1F
Heat energy required to raise the temperature of a pound of water 1F
Heat energy required to raise the temperature of a pound of water 1C
Heat energy required to raise the temperature of a litre of water 1C
Heat transferred by electromagnetic wave motion by which we receive heat from the sun is through?
Conduction
Convection
Radiation
HVAC units
What is usually provided on the intake side of the fan in the return air system?
Supply plenum
Power supply filter
Filter
Flue or stack
A schematic diagram is used to
Demonstrate how electrical circuits work
Show the relative physical location of components
To wire a circuit
To find a control device
The function of the refrigeration cycle is to
Removes heat from low temperature body and delivers it to a high temperature body
Removes heat from a high temperature body and delivers it to a low temperature body
Rejects energy to low temperature body
None of the above
Which section of the CEC covers rules relating to disconnect switches for furnaces?
Section 28
Which part of the HVAC system is responsible for compressing the Freon
Compressor
Condenser
Evaporator
TX valve
This type of compressor is completely sealed inside a metal housing and is not serviceable
Hermetic
Reciprocating
Scroll
Semi-hermetic
What substance is used in a heat cycle to transfer heat from one area, and remove it to another
Refrigerant
Neon
Vapor
Xenon
A conventional condenser unit requires a liquid refrigerant which is also called?
Freon
Hydrogen
Helium
Carbon dioxide
Which component pushes the hot gas to the finned condenser coil in the outdoor side of the air conditioner
Control valve
Evaporator thermal expansion valve
The receiver
The compressor
Two different pressures exist in the refrigeration cycle. Two components that separate the high-pressure side from the low-pressure side are:
Compressor and TRX valve
Evaporator coil and TRX valve
Condenser coil and compressor
Compressor and receiver
In the cooling mode, what component is located inside the building?
The condenser coils
The 4 way reversing valve
The evaporator
To go from cooling source in a heat pump, what is required?
TRX valve
4 way reversing valve
Double pole thermostat
A disconnect switch
The amount of heat added to the liquid to make it saturated and change states is called
Super heat
Heat energy
Latent heat
Transferred heat
Heat, that when added or removed, causes a change in temperature but not in state
Sensible heat
Low heat
Energy heat
Refrigerant lines are usually made from
Aluminum
Stainless steel
Copper
Either a or c
Which part of a cooling system absorbs heat from the air?
Accumulator
Why is it necessary to have a heating element in a heat pump?
To eliminate condenser freezing
To protect against high outside temperature
To protect against low outside temperature
To provide heat for the room
Which statement indicates an acceptable method of supplying power to a 65,000 BTU gas fired hot water furnace?
Supply furnace from basement lighting
Supply furnace from nearest receptacle
Supply furnace from smoke detector circuit
Supply from dedicated circuit
What describes heat transfer from one metal to another in a heating system?
What type of evaporator coil is used in a heat pump?
Fin tube
Helical tube
Plate tube
Air bay pass tube
What does a shop drawing show?
Cost of components
Elevation of components
Logical operation of components
Electrical rating of components
What if the minimum current rating for a disconnect serving a motor compressor?
100% of the rate load current
115% of the rated load current
125% of the RLC
140% of the RLC
A high limit control in a gas furnace control is switched with a fan limit control. What is the result?
The burner will not ignite
The fan will cycle on and off
The burner won’t turn off
The fan won’t run
Which calculation determines the size of the overload fuses for motor compressor appliances?
100% of the rated load current
