Chapter 2 Hydraulics

__ indicates the rate at which work is done.

• Energy

• Force

• Power

• Revolutions per minute (rpm)

If 225 kg of force is exerted on a hydraulic cylinder, it is equal to __ lb of force. (factor of 2.2)

• 227.2

• 450

• 454.4

• 495

Pressure is typically measured in psi, bars, and __

• flow (gpm)

• kilopascals (kPa)

• pounds (lb)

• tons (t)

If a hydraulic cylinder needs to lift a bridge beam that weighs 60,000 lb and the piston in the cylinder has a surface area of 113.10 sq in. then the hydraulic system must produce a pressure of __ psi.

• 500.35

• 530.50

• 535

• 5300.50

Most pump manufacturers recommend a vacuum rating less than or equal to __ in. Hg.

• 1

• 5

• 10

• vacuum rating depends on pump design and manufacturer specifications

A __ consists of a glass tube that is completely filled with mercury and closed on one end.

• Bourdon tube

• mercury barometer

• mercury column gauge

• Schrader gauge

__ energy is the energy of motion.

• Kinetic

• Static

• Thermal

• Total

A common form of inefficiency in a fluid power system is __

• leaks

• resistance to movement of mechanical devices

• resistance in pipes and hoses

• all of the above

__ is anything that changes or tends to change the state of rest or motion of a body.

• Energy

• Force

• Power

• Work

Fluid mechanics is comprised of static energy and __ energy.

• kinetic

• electrical

• fluid

• total