Actuator - Types

Actuators are used to:

• Sense an object

• Activate a chemical

• Make a mechanical movement

• None of the above

Which type of motion is transmitted by hydraulic actuators?

• a. Linear motion

• b. Rotary motion

• Both a and b

• None of the above

What is the function of electric actuator?

• Converts electrical energy into mechanical torque

• Converts mechanical torque into electrical energy

• Converts mechanical energy into mechanical torque

• None of the above

What is the advantage of using a single acting cylinder?

• High cost and reliable

• Honing inside the inner surface of pump is not required

• Piston seals are not required

• All the above

Why are hydraulic cylinders cushioned?

• a. cushioning decelerates the piston of a cylinder

• b. stress and vibrations can be reduced

• Both a and b

• None of the above

In single acting hydraulic cylinders, the piston comes back to its original position due to

• Spring force

• Self-weight

• Momentum of a flywheel

• All the above

In a telescopic cylinder, as the number of stages increase

• Diameter of piston rod also increases

• Diameter of piston rod decreases

• Diameter of the piston rod remains the same

• None of the above

Which of the following statements is true for standard hydraulic cylinder and a telescopic cylinder?

• Telescopic and standard cylinders give same stroke length

• Telescopic cylinders give lesser stroke length than standard cylinder

• Telescopic cylinders give greater stroke length than standard cylinder

• None of the above

Telescopic cylinders have

• Only two stage units

• Only three stage units

• Two or three stage units

• Multistage units

Which type of hydraulic cylinder has one piston connected to piston rod extended on both the sides of the cylinder?

• a. Telescopic cylinder

• b. Tandem cylinder

• Both a and b

• None of the above