Hydraulics_Unit3_review

Which of the following statements regarding single-acting and double-acting cylinders is true?

• Single-acting cylinders have half the volume of double-acting cylinders.

• Single-acting cylinders operate at half the speed of double-acting cylinders.

• Fluid pressure can be applied to the piston of single-acting cylinders in only one direction

• None of the choices here.

When fluid enters the rod end of a typical double-acting cylinder,

• the cylinder rod retracts.

• the cylinder rod extends.

• the pressure at the cap end becomes maximal.

• the pressure at the rod end becomes maximal

The direction of operation of double-acting cylinders is usually controlled using a

• pressure-relief valve.

• flow control valve.

• directional control valve.

• none of the choices here.

Which of the following conditions of operation decreases the travel speed of a cylinder?

• High flow rate

• Large cylinder volume

• Rod retraction (instead of rod extension)

• All of the choices here.

A flow control valve can be used to adjust the travel speed of a cylinder by

• decreasing the flow rate in the cylinder

• decreasing the pressure upstream of the cylinder

• decreasing the volume of the cylinder.

• inverting the flow direction in the cylinder.

Which of the following is true?

• 𝑃 = 𝐴F

• F = P/A

• F= PA

• None of the choices here.

Consider an actuator with a cylinder radius of 3 cm (1.18 in) and a rod radius of 2 cm (0.394 in). What is the pressure at the cap end if the pressure at the rod end is 10 bar?

• 22.5 bar

• 4.45 bar

• 5.55 bar

• 18 bar

In a typical double-acting cylinder, the

• area at the cap end is smaller than that at the rod end.

• area at the rod end is smaller than that at the cap end.

• full area is equal to the area of the cap end plus that of the rod end.

• annular area is equal to the area of the cap end plus that of the rod end.

All other parameters being equal, the higher the pressure applied to the cap end of a cylinder, the

• higher the force generated by the cylinder.

• lower the force generated by the cylinder.

• faster the travel speed of the cylinder

• slower the travel speed of the cylinder.

All other parameters being equal, the greater the difference in area between the cap end and the rod end of a cylinder, the

• lower the flow rate in the cylinder.

• higher the flow rate in the cylinder

• smaller the pressure differential between both ends of the cylinder.

• greater the pressure differential between both ends of the cylinder.