Chapter 11

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

Question 2

A room thermostat should be mounted on an inside wall about blank above the floor and in the path of natural air circulation when the heating system is off.
A. 4.5 m, [15 feet]
B. 1.5 m, [5 feet]
C. 2.5 m, [8 feet]
D. 3.5 m, [11.5 feet]

Answer 2

B

Question 3

The capacitor type control motor has a rotor and gear train sealed in a housing partially filled with
A. water
B. glycol
C. oil
D. grease

Answer 3

C

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

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. Thermostatic switch
C. Bimetal switch
D. Mercury bulb switch

Answer 5

D