Chapter 30 Electric Controls for Heating Systems

Question 1

A controller is a device that reacts to which of the following to provide two position, floating, or proportioning control of an actuator or relay?

a) Pressure
b) Temperature
c) Humidity
d) All of the above

Answer 1

d) All of the above

Question 2

A room thermostat should be mounted on an inside wall about ______ above the floor and in the path of natural air circulation when the heating system is off.

a) 4.5 m (15 ft)
b) 1.5 m (5 ft)
c) 2.5 m (8 ft)
d) 3.5 m (11.5 ft)

Answer 2

b) 1.5 m (5 ft)

Question 3

A capacitor type control motor has the rotor and gear train sealed in a housing partially filled with:

a) Water
b) Glycol
c) Oil
d) Grease

Answer 3

c) Oil

Question 4

The electric current is transmitted through an electric wire, called the ________ to the burner.

a) Connecting link
b) Positive loop
c) Negative loop
d) Neutral

Answer 4

a) Connecting link

Question 5

Which of the following types of switching devices are used in conjunction with bimetal strips to control high voltage circuits?

a) Open-contact switch
b) Mercury bulb switch
c) Snap switch
d) All of the above

Answer 5

d) All of the above