16 - Eat 1

Question 1

What is the piston area in sq. in. of a piston 6 inches in diameter?
A) 31.6 B) 28.3 C) 27.6 D) 25.4

Answer 1

B) 28.3 A=πR2 A=π32 A=28.26 pg 17

Question 2

The pressure at the bottom of a column of oil 20 ft high is ______ psi.
A) 7 B) 4 C) 8 D) 6

Answer 2

C) 8 1 cu. ft. oil = 0.4 psi
20 ft. x 0.4 = 8 pg 7

Question 3

The result of pressure acting on an area is called?
A) work B) resistance C) Force D) velocity

Answer 3

C) Force pg 16

Question 4

The pressure required to push oil through three 100 psi check valves in series is _____ psi. A) 300 B) 200
C) 100 D) 400

Answer 4

A) 300 Valve in series are additive pg 14

Question 5

Factors affecting the speed of an actuator are the flow rate of oil and the piston ______. A) Outlet B) power C) resistance D) area

Answer 5

D) Area pg 17

Question 6

The volume of oil a cylinder will hold can be determined by multiplying the piston area by the _______.
A) Stroke Length B) Pressure
C) Prime mover D) Power

Answer 6

A) Stroke Length (Stroke Length aka Height)

Question 7

Resistance to flow creates? A) force
B) work C) Pressure D) power

Answer 7

C) Pressure pg 10

Question 8

The pressure available to force liquid into a pump is usually?
A) Atmospheric B) Horsepower C) Actuator D) Force

Answer 8

A) Atmospheric (Atmospheric Pressure is 14.7 psi) pg 9

Question 9

The rate at which work is performed is determined by the ______ and _____ size (hydraulic components)
A) Outlet; Inlet B) Piston; Cylinder C) Valve; Pump D) Actuator; Pump

Answer 9

D) Actuator; Pump pg 4

Question 10

If a force of 950 pounds is applied over a 30 sq in area, the pressure developed would be _____ psi. A) 32.3 B) 32.1
C) 31.5 D) 31.6

Answer 10

D) 31.6 pg 17

Question 11

The function of a directional valve is to control the fluid ____.
A) Prime mover B) Power C) Direction D) Flow

Answer 11

C) Direction

Question 12

The quantity of force exerted over a distance with no time element considered is called? A) force B) power C) Work D) resistance

Answer 12

C) Work pg 21

Question 13

Horsepower can be calculated by multiplying the GPM by the pressure and the constance ______. A) .00583 B) .000583 C) 3.14 D) 1.00683

Answer 13

B) .000583 1 Gallon flow @ 1 psi = 0.00583
HP = GPM x psi x 0.000583 pg 22

Question 14

When fluid flow is turbulent, friction varies as the square of the? A) Velocity B) Pressure C) Power D) Force

Answer 14

A) Velocity pg 19

Question 15

The design of a hydraulic circuit begins with the? A) inlet B) pump C) Actuator D) stroke length

Answer 15

C) Actuator pg 23

Question 16

A relief valve limits the maximum pressure at the ______ port to the directional valve. A) outlet B) Inlet
C) Actuator D) Pump

Answer 16

B) Inlet pg 10?

Question 17

Force per unit is called? A) Velocity B) Power
C) Resistance D) Pressure

Answer 17

D) Pressure pg 17

Question 18

The input hydraulic component in a hydraulic system is called the?
A) Actuator B) Pump C) Prime Mover D) Piston

Answer 18

B) Pump pg 4

Question 19

What is considered the source of power in a hydraulic circuit?
A) Prime Mover B) Actuator C) Pump D) Piston

Answer 19

A) Prime Mover pg 4

Question 20

Inlet pressure of a pump is usually measured in? A) Gallons per minute B) Stroke length C) inches H.G. D) Velocity

Answer 20

“C) Inches H.G. (Hg is inches of mercury)
(**H.G. is incorrect spelling see image for correct)
pg 10”