12095803
Descrição
Quiz por Kaitlyn Hickey, atualizado more than 1 year ago
|
Criado por Kaitlyn Hickey
aproximadamente 7 anos atrás
|
|
Questão 1
Questão
Which schematic diagram represents a heating thermostat?
Responda
-
NC temperature-actuated switch
-
NO temperature-actuated
-
NC liquid level-actuated switch
-
NO liquid level-actuated switch
Questão 2
Questão
What are the two types of electrical diagrams used in the heating and cooling industry?
Responda
-
Power and control
-
Schematic and wiring
-
Power and wiring
-
Control and power
Questão 3
Questão
What is best use to demonstrate how electrical circuits works?
Responda
-
Schematic diagram
-
Wiring diagram
-
Power source diagram
-
Control diagram
Questão 4
Questão
Which diagram is used to find the physical location of a component?
Responda
-
Schematic diagram
-
Wiring diagram
-
Power source diagram
-
Control diagram
Questão 5
Questão
A device that reacts to changes in a variable-condition is referred to as?
Responda
-
A relay device
-
An igniting device
-
A load device
-
A controlling device
Questão 6
Questão
An example of a load device is
Responda
-
Thermostat
-
Limit switch
-
Fan switch
-
Gas valve
Questão 7
Questão
What is an example of a limit safety control device?
Responda
-
High limit switch
-
High temperature switches
-
Low-pressure switch
-
All the above
Questão 8
Questão
Power supplies if 24 volts, are used to operate what part of the system?
Responda
-
The power circuit
-
The control circuit
-
The protection circuit
-
The thermocouple circuit
Questão 9
Questão
When does a gas fired furnace in a single-dwelling require a disconnect switch?
Responda
-
Always
-
Not required
-
As required by section 26 in the CEC
-
As required by section 16 in the CEC
Questão 10
Questão
Is a residential furnace allowed to have a light in the furnace room on its supply circuit?
Responda
-
Yes
-
No
Questão 11
Questão
What section of the CEC deals with the control circuit wiring?
Responda
-
Section 16
-
Section 26
-
Section 28
-
Section 32
Questão 12
Questão
What are the most commonly used types of temperature-sensing devices?
Responda
-
Bimetal temperature-sensing elements
-
thermistors
-
RDT’s
-
Pyrometer’s
Questão 13
Questão
Which type of temperature-sensing device is best used to operate large snap action contacts such as line voltage thermostats?
Responda
-
Strip type bimetal temperature-sensing element
-
Spiral type bimetal-sensing device
-
Liquid bulb type
-
Bellows type temperature-sensing devices
Questão 14
Questão
What type of temperature sensing device is especially suitable for pipes or tanks
Responda
-
Bellows type
-
Liquid bulb type
-
Thermocouple
-
Thermistor
Questão 15
Questão
A thermocouple generates a typical voltage of?
Responda
-
20mv
-
30mv
-
40mv
-
50mv
Questão 16
Questão
A thermopile generates a typical voltage of up to
Responda
-
500mv
-
600mv
-
700mv
-
800mv
Questão 17
Questão
Which of these two devices has a constant temperature to resistance ratio?
Responda
-
RTD
-
Thermistor
Questão 18
Questão
The types of contacts used in thermostats are?
Responda
-
Mercury
-
Spring activated, snap-action, exposed
-
Glass-enclosed, magnet and armature snap-action
-
All the above
Questão 19
Questão
In a heating thermostat the anticipator has what type of connection with the contacts?
Responda
-
Series connection
-
Parallel connection
-
Combination connection
-
Compound connection
Questão 20
Questão
In a cooling thermostat the anticipator has what type of connection with the contacts?
Responda
-
Series connection
-
Parallel connection
-
Combination connection
-
Compound connection
Questão 21
Questão
Where is the best location for a thermostat?
Responda
-
On an inside wall
-
On an outside wall
-
Under the HVAC
-
Directly opposite the heat flow
Questão 22
Questão
The usual setting of a high limit switch for a furnace is?
Responda
-
70-80 degrees C
-
80-100 degrees C
-
90-130 degrees C
-
80-120 degrees C
Questão 23
Questão
When not connected to the power supply, the position of the thermocouple relative to the pilot flame should be adjusted to read?
Responda
-
Open circuit test of 26-32 mv
-
Closed circuit test of 26-32 mv
-
Open circuit test of 7.5-15 mv
-
Closed circuit test of 7.5-15 mv
Questão 24
Questão
What type of control switch resets when the temperature drops 11 degrees below the set point?
Responda
-
High limit/ fan control switch
-
Thermostat actuator switch
-
High limit main gas valve switch
-
Summer switch
Questão 25
Questão
What device is represented by the words COMP in a legend?
Responda
-
Contactor
-
Compressor motor
-
Condenser fan motor
-
Indoor fan motor
Questão 26
Questão
What type of thermostat is used for a basic heating system?
Responda
-
Two wire
-
Three wire
-
Five wire
-
Seven wire
Questão 27
Questão
Which type of thermostat will have an on-off-auto switch?
Responda
-
Two wire
-
Three wire
-
Five wire
-
Seven wire
Questão 28
Questão
Which type of thermostat is used for combination heating and cooling units?
Responda
-
Two wire
-
Three wire
-
Five wire
-
Seven wire
Questão 29
Questão
Which type of thermostat is required for two stage heat and two stage cooling?
Responda
-
Two wire
-
Three wire
-
Five wire
-
Seven wire
Questão 30
Questão
When do you connect RH and RC together in a five wire thermostat
Responda
-
When one control transformer is used
-
When two or more control transformers are used
Quer criar seus próprios Quizzes gratuitos com a GoConqr? Saiba mais.