Transmitters or transducers can measure

Transmitters or transducers can measure

a) temperature
b) air flow
c) air flow velocity
d) water flow
e) all of the above







Answer: E

Electronic controllers can be divided into two types

Electronic controllers can be divided into two types

a) on or off
b) modulating and direct acting
c) indirect and direct acting
d) on or off and modulating
e) actuators and relays






Answer: D

An example of a final control element is a

An example of a final control element is a

a) thermostat
b) fire eye
c) relay
d) damper
e) thermocouple

Answer: D

In a basic electrical control system the device that senses a drop in air temperature is called the

In a basic electrical control system the device that senses a drop in air temperature is called the

a) final controlled device
b) pneumatic temperature sensor
c) humidistat
d) thermostat
e) regulator






Answer: D

Control motors are divided into two classifications

Control motors are divided into two classifications

a) large and small
b) AC and DC
c) valve operators and damper operators
d) high voltage and low voltage
e) pump and fan controllers







Answer: C

An example of a controlled device would be

An example of a controlled device would be

a) a damper motor operating air louvers
b) a hot water boiler
c) a radiator
d) a steam boiler
e) a thermostat








Answer: A

Pressure controllers can be divided into two classes

Pressure controllers can be divided into two classes

a) high and low temperature
b) high and low pressure
c) high and low flow
d) inside and outside mounting
e) all of the above

Answer: B

A room thermostat should be mounted on an inside wall about

A room thermostat should be mounted on an inside wall about

a) 0.5 m above the floor
b) 0.75 m above the floor
c) 1.0 m above the floor
d) 1.25 m above the floor
e) 1.5 m above the floor





Answer: E

A bimetal thermostat's operating range is between

A bimetal thermostat's operating range is between

a) 5 and 40 degrees C
b) 0 and 50 degrees C
c) 0 and 40 degrees C
d) 10 and 32 degrees C
e) 50 and 90 degrees C







Answer: D

On-off thermostats are equipped with

On-off thermostats are equipped with

a) an open contact switch
b) a high temperature switch
c) a low temperature switch
d) a high voltage switch
e) a low voltage switch







Answer: A

Thermostats may be classified according to their

Thermostats may be classified according to their

a) application
b) type of temperature sensing element
c) type of control action provided
d) temperature range
e) all of the above






Answer: E

A device used to position dampers and control valves is termed

A device used to position dampers and control valves is termed

a) a controller
b) a relay
c) a transformer
d) an actuator
e) a temperature controller

Answer: D

The electrical resistance of a thermistor will:

The electrical resistance of a thermistor will:

a. Decrease when cooled
b. Decrease when heated
c. Increase when heated
d. Remain constant with temperature changes
e. Depend upon its application





Answer: B

An electronic control system is comprised of a:

An electronic control system is comprised of a:

a. Meter, sensor, and valve
b. Sensor, controller, and final control element
c. Sensor, transmitter, and thermostat
d. Controller, thermostat, and sensor
e. Thermostat, electronic controls, and furnace









Answer: B

An advantage of an electronic control system is that:

An advantage of an electronic control system is that:

a. The controllers can accept a wide variety of inputs
b. They are inexpensive to operate
c. They are inexpensive to install
d. The controllers can be used outdoors
e. It is very compact







Answer: A

Authority or Compensation Authority is the:

Authority or Compensation Authority is the:

a. A process of automatically adjusting the setpoint of a controller.
b. Point in which the compensation effect is reversed in action.
c. System element that senses a variable other than the controlled variable.
d. Setting that indicates the effect a compensating sensor has on the main setpoint.
e. Entity that awards compensation after a workplace injury

Answer: D

Resistance temperature devices can provide a relatively linear resistance variation from:

Resistance temperature devices can provide a relatively linear resistance variation from:

a. -60 to 80°C
b. -40 to 120°C
c. -40 to 250°C
d. 0 to 100°C
e. 40 to 100°C







Answer: B

A direct acting controller:

A direct acting controller:

a. Increases its output signal on an increased input signal
b. Increases its output signal on a decreased input signal
c. Only handles direct acting inputs
d. Only handles reverse acting inputs
e. Decreases its output signal on an increased input signal

Answer: A

An electronic controller is:

An electronic controller is:

a. Operated on variable current signals
b. Used to position an actuator
c. Cannot interpret variable voltage inputs
d. Operate only as on-off controls
e. Convert 2-poition inputs to proportional outputs







Answer: B

Setpoint deviation is also called:

Setpoint deviation is also called:

a. Derivative
b. Proportional band
c. Offset
d. Integral
e. Gain







Answer: C