12097647
Descrição
Quiz por Kaitlyn Hickey, atualizado more than 1 year ago
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Criado por Kaitlyn Hickey
quase 7 anos atrás
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Questão 1
Questão
Which section of the CEC deals with installation of heating units
Responda
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Section 12
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Section 16
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Section 46
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Section 62
Questão 2
Questão
A BTU is
Responda
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Heat energy required to raise the temperature of a litre of water 1F
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Heat energy required to raise the temperature of a pound of water 1F
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Heat energy required to raise the temperature of a pound of water 1C
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Heat energy required to raise the temperature of a litre of water 1C
Questão 3
Questão
Heat transferred by electromagnetic wave motion by which we receive heat from the sun is through?
Responda
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Conduction
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Convection
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Radiation
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HVAC units
Questão 4
Questão
What is usually provided on the intake side of the fan in the return air system?
Responda
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Supply plenum
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Power supply filter
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Filter
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Flue or stack
Questão 5
Questão
A schematic diagram is used to
Responda
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Demonstrate how electrical circuits work
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Show the relative physical location of components
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To wire a circuit
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To find a control device
Questão 6
Questão
The function of the refrigeration cycle is to
Responda
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Removes heat from low temperature body and delivers it to a high temperature body
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Removes heat from a high temperature body and delivers it to a low temperature body
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Rejects energy to low temperature body
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None of the above
Questão 7
Questão
Which section of the CEC covers rules relating to disconnect switches for furnaces?
Responda
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Section 12
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Section 16
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Section 28
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Section 62
Questão 8
Questão
Which part of the HVAC system is responsible for compressing the Freon
Responda
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Compressor
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Condenser
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Evaporator
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TX valve
Questão 9
Questão
This type of compressor is completely sealed inside a metal housing and is not serviceable
Responda
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Hermetic
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Reciprocating
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Scroll
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Semi-hermetic
Questão 10
Questão
What substance is used in a heat cycle to transfer heat from one area, and remove it to another
Responda
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Refrigerant
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Neon
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Vapor
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Xenon
Questão 11
Questão
A conventional condenser unit requires a liquid refrigerant which is also called?
Responda
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Freon
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Hydrogen
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Helium
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Carbon dioxide
Questão 12
Questão
Which component pushes the hot gas to the finned condenser coil in the outdoor side of the air conditioner
Responda
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Control valve
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Evaporator thermal expansion valve
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The receiver
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The compressor
Questão 13
Questão
Two different pressures exist in the refrigeration cycle. Two components that separate the high-pressure side from the low-pressure side are:
Responda
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Compressor and TRX valve
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Evaporator coil and TRX valve
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Condenser coil and compressor
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Compressor and receiver
Questão 14
Questão
In the cooling mode, what component is located inside the building?
Responda
-
The condenser coils
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The 4 way reversing valve
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The compressor
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The evaporator
Questão 15
Questão
To go from cooling source in a heat pump, what is required?
Responda
-
TRX valve
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4 way reversing valve
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Double pole thermostat
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A disconnect switch
Questão 16
Questão
The amount of heat added to the liquid to make it saturated and change states is called
Responda
-
Super heat
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Heat energy
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Latent heat
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Transferred heat
Questão 17
Questão
Heat, that when added or removed, causes a change in temperature but not in state
Responda
-
Latent heat
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Sensible heat
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Low heat
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Energy heat
Questão 18
Questão
Refrigerant lines are usually made from
Responda
-
Aluminum
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Stainless steel
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Copper
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Either a or c
Questão 19
Questão
Which part of a cooling system absorbs heat from the air?
Responda
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Condenser
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Evaporator
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Compressor
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Accumulator
Questão 20
Questão
Why is it necessary to have a heating element in a heat pump?
Responda
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To eliminate condenser freezing
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To protect against high outside temperature
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To protect against low outside temperature
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To provide heat for the room
Questão 21
Questão
Which statement indicates an acceptable method of supplying power to a 65,000 BTU gas fired hot water furnace?
Responda
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Supply furnace from basement lighting
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Supply furnace from nearest receptacle
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Supply furnace from smoke detector circuit
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Supply from dedicated circuit
Questão 22
Questão
What describes heat transfer from one metal to another in a heating system?
Responda
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Conduction
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Radiation
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Convection
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Evaporator
Questão 23
Questão
What type of evaporator coil is used in a heat pump?
Responda
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Fin tube
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Helical tube
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Plate tube
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Air bay pass tube
Questão 24
Questão
What does a shop drawing show?
Responda
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Cost of components
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Elevation of components
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Logical operation of components
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Electrical rating of components
Questão 25
Questão
What if the minimum current rating for a disconnect serving a motor compressor?
Responda
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100% of the rate load current
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115% of the rated load current
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125% of the RLC
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140% of the RLC
Questão 26
Questão
A high limit control in a gas furnace control is switched with a fan limit control. What is the result?
Responda
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The burner will not ignite
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The fan will cycle on and off
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The burner won’t turn off
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The fan won’t run
Questão 27
Questão
Which calculation determines the size of the overload fuses for motor compressor appliances?
Responda
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100% of the rated load current
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115% of the rated load current
-
125% of the RLC
-
140% of the RLC
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