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WorksheetsQUIZ 2 - PRINCIPLE OF FINAL CONTROL ELEMENT AND ACTUATOR
Total questions: 20
Worksheet time: 20mins
In most process control systems, the final control element is a
Transmitter
Sensor
Controller
Valve
The pneumatic system uses low-pressurized air to move a pneumatic cylinder
True
False
The hydraulic system uses high-pressurized air to move a hydraulic cylinder
True
False
Identify the type of this directional control valve.
2/2 way valve
5/2 way double pilot valve
3/2 way single pilot valve
5/3 way double pilot valve
When a voltage is applied to the coil of a solenoid, current will flow, the coil builds up a magnetic field that will rotate the piston inside the solenoid.
True
False
There are two basic types of ac motor which are induction and synchronous motor.
True
False
Poppet Valve is used to control the flow of a gas or vapor.
True
False
Select all the types of Final Control Elements in process control.
Butterfly valve
Stepper motor
Pressure transmitter
Double-acting cylinder
An actuator is ...
a digital device that senses movement
a digital device that receive signal from feedback sensor
an analog device that senses movement
an Analog device that produces movement
Which one of these actuators mainly produces linear motion over a small distance
Servo
Solenoid
DC Motor
Stepper motor
A spring-loaded air-operated valve shown in a throttled position.
Which one of the following will be the valve position following a reduction in air pressure to the valve actuator caused by a leaking air connection at the valve?
More closed
More open
Original position
A control valve consists of an actuator to open and close the valve. The type of actuator is only an electrical actuator.
True
False
A commonly used rotary valve is the Butterfly Valve.
True
False
Below are the disadvantages of a hydraulic system except:
Very sensitive to dirt and other foreign material
Moderate speed
Expensive
Leakage problem
The figure above shows a block diagram of a hydraulic system
True
False
A hydraulic actuator converts energy (typically in the form of compressed air) into motion.
True
False
Based on the figure above, which statement is true.
Air will flow to the single-acting cylinder from port 1 to port 2 when the valve is actuated and cause the cylinder to extend.
The cylinder will retract when the button is pressed.
Air will flow to the single-acting cylinder from port 1 to port 2 when the valve is actuated and cause the cylinder to retract.
Nothing happen when the button is pressed.
What does this symbol represent?
2 way / 2 position directional control valve
3 way / 2 position directional control valve
4 way / 2 position directional control valve
5 way / 2 position directional control valve
This is a quick exhaust valve
True
False
Which gas is commonly used in Pneumatics?
Oxygen
Hydrogen
Air
Nitrogen
