Kaitlyn Hickey
Quiz by , created more than 1 year ago

Quiz on ER-2720, created by Kaitlyn Hickey on 03/02/2018.

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Kaitlyn Hickey
Created by Kaitlyn Hickey over 6 years ago
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ER-2720 assignment

ER-2720 assignment

Question 1 of 30

1

Which schematic diagram represents a heating thermostat?

Select one of the following:

  • NC temperature-actuated switch

  • NO temperature-actuated

  • NC liquid level-actuated switch

  • NO liquid level-actuated switch

Explanation

Question 2 of 30

1

What are the two types of electrical diagrams used in the heating and cooling industry?

Select one of the following:

  • Power and control

  • Schematic and wiring

  • Power and wiring

  • Control and power

Explanation

Question 3 of 30

1

What is best use to demonstrate how electrical circuits works?

Select one of the following:

  • Schematic diagram

  • Wiring diagram

  • Power source diagram

  • Control diagram

Explanation

Question 4 of 30

1

Which diagram is used to find the physical location of a component?

Select one of the following:

  • Schematic diagram

  • Wiring diagram

  • Power source diagram

  • Control diagram

Explanation

Question 5 of 30

1

A device that reacts to changes in a variable-condition is referred to as?

Select one of the following:

  • A relay device

  • An igniting device

  • A load device

  • A controlling device

Explanation

Question 6 of 30

1

An example of a load device is

Select one of the following:

  • Thermostat

  • Limit switch

  • Fan switch

  • Gas valve

Explanation

Question 7 of 30

1

What is an example of a limit safety control device?

Select one of the following:

  • High limit switch

  • High temperature switches

  • Low-pressure switch

  • All the above

Explanation

Question 8 of 30

1

Power supplies if 24 volts, are used to operate what part of the system?

Select one of the following:

  • The power circuit

  • The control circuit

  • The protection circuit

  • The thermocouple circuit

Explanation

Question 9 of 30

1

When does a gas fired furnace in a single-dwelling require a disconnect switch?

Select one of the following:

  • Always

  • Not required

  • As required by section 26 in the CEC

  • As required by section 16 in the CEC

Explanation

Question 10 of 30

1

Is a residential furnace allowed to have a light in the furnace room on its supply circuit?

Select one of the following:

  • Yes

  • No

Explanation

Question 11 of 30

1

What section of the CEC deals with the control circuit wiring?

Select one of the following:

  • Section 16

  • Section 26

  • Section 28

  • Section 32

Explanation

Question 12 of 30

1

What are the most commonly used types of temperature-sensing devices?

Select one of the following:

  • Bimetal temperature-sensing elements

  • thermistors

  • RDT’s

  • Pyrometer’s

Explanation

Question 13 of 30

1

Which type of temperature-sensing device is best used to operate large snap action contacts such as line voltage thermostats?

Select one of the following:

  • Strip type bimetal temperature-sensing element

  • Spiral type bimetal-sensing device

  • Liquid bulb type

  • Bellows type temperature-sensing devices

Explanation

Question 14 of 30

1

What type of temperature sensing device is especially suitable for pipes or tanks

Select one of the following:

  • Bellows type

  • Liquid bulb type

  • Thermocouple

  • Thermistor

Explanation

Question 15 of 30

1

A thermocouple generates a typical voltage of?

Select one of the following:

  • 20mv

  • 30mv

  • 40mv

  • 50mv

Explanation

Question 16 of 30

1

A thermopile generates a typical voltage of up to

Select one of the following:

  • 500mv

  • 600mv

  • 700mv

  • 800mv

Explanation

Question 17 of 30

1

Which of these two devices has a constant temperature to resistance ratio?

Select one of the following:

  • RTD

  • Thermistor

Explanation

Question 18 of 30

1

The types of contacts used in thermostats are?

Select one of the following:

  • Mercury

  • Spring activated, snap-action, exposed

  • Glass-enclosed, magnet and armature snap-action

  • All the above

Explanation

Question 19 of 30

1

In a heating thermostat the anticipator has what type of connection with the contacts?

Select one of the following:

  • Series connection

  • Parallel connection

  • Combination connection

  • Compound connection

Explanation

Question 20 of 30

1

In a cooling thermostat the anticipator has what type of connection with the contacts?

Select one of the following:

  • Series connection

  • Parallel connection

  • Combination connection

  • Compound connection

Explanation

Question 21 of 30

1

Where is the best location for a thermostat?

Select one of the following:

  • On an inside wall

  • On an outside wall

  • Under the HVAC

  • Directly opposite the heat flow

Explanation

Question 22 of 30

1

The usual setting of a high limit switch for a furnace is?

Select one of the following:

  • 70-80 degrees C

  • 80-100 degrees C

  • 90-130 degrees C

  • 80-120 degrees C

Explanation

Question 23 of 30

1

When not connected to the power supply, the position of the thermocouple relative to the pilot flame should be adjusted to read?

Select one of the following:

  • 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

Explanation

Question 24 of 30

1

What type of control switch resets when the temperature drops 11 degrees below the set point?

Select one of the following:

  • High limit/ fan control switch

  • Thermostat actuator switch

  • High limit main gas valve switch

  • Summer switch

Explanation

Question 25 of 30

1

What device is represented by the words COMP in a legend?

Select one of the following:

  • Contactor

  • Compressor motor

  • Condenser fan motor

  • Indoor fan motor

Explanation

Question 26 of 30

1

What type of thermostat is used for a basic heating system?

Select one of the following:

  • Two wire

  • Three wire

  • Five wire

  • Seven wire

Explanation

Question 27 of 30

1

Which type of thermostat will have an on-off-auto switch?

Select one of the following:

  • Two wire

  • Three wire

  • Five wire

  • Seven wire

Explanation

Question 28 of 30

1

Which type of thermostat is used for combination heating and cooling units?

Select one of the following:

  • Two wire

  • Three wire

  • Five wire

  • Seven wire

Explanation

Question 29 of 30

1

Which type of thermostat is required for two stage heat and two stage cooling?

Select one of the following:

  • Two wire

  • Three wire

  • Five wire

  • Seven wire

Explanation

Question 30 of 30

1

When do you connect RH and RC together in a five wire thermostat

Select one of the following:

  • When one control transformer is used

  • When two or more control transformers are used

Explanation

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