ABSA 4A UNIT 9 FINAL EXAM TEST 2026\2027.
Which chart recorder came first?
a. Circular
b. Circular strip
c. Strip
d. Strip chart circular
a. Circular
A valve which gives good throttling action, takes less actuator force, but does not seal well is a:
Select one:
a. Double seated valve
b. Reverse acting valve
c. Single seated valve
d. Direct acting valve
a. Double seated valve
A variable which is adjusted in order to maintain or achieve some desired value of another
variable is termed the:
Select one:
a. Process variable
b. Final variable
c. Manipulated variable
d. Controlled variable
c. Manipulated variable
Fail-closed solenoid operated valves open when
Select one:
a. a coil is electrically energized
b. pressure below the valve disc overcomes the spring pressure above the disc
c. an electric motor opens the valve
d. it is de-energized
a. a coil is electrically energized
The Bourdon tube is often shaped in the form of a "C", having an arc span of about:
Select one:
a. 180 degrees
, ABSA 4A UNIT 9 FINAL EXAM TEST 2026\2027.
b. 200 degrees
c. 90 degrees
d. 270 degrees
d. 270 degrees
Electro-hydraulic valves open slowly when energized. However, when electric power is
interrupted, a powerful _____________ quickly slams the valve shut, thereby stopping the fuel
flow to the
burner.
a. Spring
b. Diaphragm
c. Motor
d. Bellows
a. Spring
A helix strip bimetallic thermometer is wound spirally to:
Select one:
a. Dampen the motion of the pointer
b. Ease its installation
c. Increase the range of temperature it can measure
d. Amplify the motion of the pointer
d. Amplify the motion of the pointer
Putting a controller on manual control means:
Select one:
a. The operator controls the final control element.
b. The controller output responds to a process variable.
c. There is no control of the final control element.
d. The operator manually adjusts the process by changing the process variable signal
a. The operator controls the final control element.
What are two methods of signal transmission?
a. Digital and fibre optic
b. Analog and digital
c. Analog and transducer
d. Digital and current
Which chart recorder came first?
a. Circular
b. Circular strip
c. Strip
d. Strip chart circular
a. Circular
A valve which gives good throttling action, takes less actuator force, but does not seal well is a:
Select one:
a. Double seated valve
b. Reverse acting valve
c. Single seated valve
d. Direct acting valve
a. Double seated valve
A variable which is adjusted in order to maintain or achieve some desired value of another
variable is termed the:
Select one:
a. Process variable
b. Final variable
c. Manipulated variable
d. Controlled variable
c. Manipulated variable
Fail-closed solenoid operated valves open when
Select one:
a. a coil is electrically energized
b. pressure below the valve disc overcomes the spring pressure above the disc
c. an electric motor opens the valve
d. it is de-energized
a. a coil is electrically energized
The Bourdon tube is often shaped in the form of a "C", having an arc span of about:
Select one:
a. 180 degrees
, ABSA 4A UNIT 9 FINAL EXAM TEST 2026\2027.
b. 200 degrees
c. 90 degrees
d. 270 degrees
d. 270 degrees
Electro-hydraulic valves open slowly when energized. However, when electric power is
interrupted, a powerful _____________ quickly slams the valve shut, thereby stopping the fuel
flow to the
burner.
a. Spring
b. Diaphragm
c. Motor
d. Bellows
a. Spring
A helix strip bimetallic thermometer is wound spirally to:
Select one:
a. Dampen the motion of the pointer
b. Ease its installation
c. Increase the range of temperature it can measure
d. Amplify the motion of the pointer
d. Amplify the motion of the pointer
Putting a controller on manual control means:
Select one:
a. The operator controls the final control element.
b. The controller output responds to a process variable.
c. There is no control of the final control element.
d. The operator manually adjusts the process by changing the process variable signal
a. The operator controls the final control element.
What are two methods of signal transmission?
a. Digital and fibre optic
b. Analog and digital
c. Analog and transducer
d. Digital and current
