Question 1: If the fluid is under pressure but not moving, such as a cylinder stalled against a load, only __________ is being transmitted.

Question 2: The cylinder shown here is a ______________________.

Question 3: Movement in a double-acting cylinder takes place when there is a sufficient difference in pressure between the opposite sides of the piston.

Question 4: Cylinders are 'constant horsepower' devices. They can produce equal horsepower either while extending or retracting, though the power may be at a different ratio of speed and force.

Question 5: The amount of force, in pounds, that a cylinder can produce can be calculated by multiplying the gauge pressure (PSIG) times the square inch area of the piston surface that it is working against. This is an application of Boyles’ Law.

Question 6: It is generally accepted that standard air cylinders have relatively small piston rods in which the net area is 90% of the full piston area and the rod area is often disregarded in calculations.

Question 7: Hydraulic cylinders normally have larger rods, with the rod area being as much as 50% of the full piston area. Often rod end area is disregarded in calculations.

Question 8: The press shown here has a bore of 10 inches, if the operating pressure in 1000 PSIG, what force is exerted on the extension stroke?

Question 9: The cylinder shown here is operating under a pressure of 80 PSIG. What is the force on extension?

Question 10: In order to calculate the travel speed of hydraulic cylinder, the incoming volume of fluid can be divided by the cross-sectional area of the cavity being filled.

That's not quite right! Correct answer to this question is:

force

That’s Right!

That's not quite right! Correct answer to this question is:

Double-acting

That’s right!

That's not quite right! It is True that movement in a double-acting cylinder takes place when there is a sufficient difference in pressure between the opposite sides of the piston.

That’s right!

That's not quite right! It is True that Cylinders are 'constant horsepower' devices. They can produce equal horsepower either while extending or retracting, though the power may be at a different ratio of speed and force.

That’s right!

That's not quite right! Correct answer to this question is: False

That’s right!

That's not quite right! It is True that it is generally accepted that standard air cylinders have relatively small piston rods in which the net area is 90% of the full piston area and the rod area is often disregarded in calculations.

That’s right!

That's not quite right! It is False. Hydraulic cylinders normally have smaller rods, with the rod area being as little as 10% of the full piston area.

That’s right!

That's not quite right! A = π D2/4

So A = 3.14 x (10 x 10) / 4,

So A = 78.5 Sq. In.

Then you use that 78.5 Sq. In. result, with formula F = PA .

1000 PSIG times 78.5 Square Inches =

78000

That’s right!

That's not quite right!

A = π r2

A = 3.14 x (2.25 x 2.25)

A = 15.90 Sq. In.

F = PA

F = 80 x 15.90

F= 127.2 PSI

That’s right!

That's not quite right! Correct answer to this question is: True

That’s right!