22 - Eat 7

Question 1

Ram type cylinders are usually returned by? A) Revolution B) Rotation C) Gravity D) Flow

Answer 1

C) Gravity pg 149

Question 2

Double-acting cylinders are returned by? A) Revolution B) Gravity C) Hydraulics D) Rotation

Answer 2

C) Hydraulics pg 151

Question 3

With a delivery of 3 GPM to the cap end of a two-inch cylinder, the speed is ____ inches/minute. A) 2,207 B) 220.7 C) 2,206 D) 220.6

Answer 3

D) 220.6 pg 157

Question 4

The force exerted by a three-inch diameter ram at 2000 PSI is ___ pounds. A) 1,437 B) 14,136 C) 14,137 D) 14,237

Answer 4

C) 14,137 pg 157

Question 5

What pressure is developed when exerting a 14,000 pound force over a piston area of seven square inches? PSI A) 1,500 PSI B) 2,500 PSI C) 2,000 PSI D) 2,100 PSI

Answer 5

C) 2,000 PSI pg 157

Question 6

The displacement of a hydraulic motor is the amount of fluid in cubic inches to make one? A) Operation B) Revolution C) Horsepower D) Gallon

Answer 6

B) Revolution pg 164

Question 7

Torque ratings of hydraulic motors are usually given in pound-inches or pound-feet per ______ PSI A) 25 B) 50 C) 100 D) 110

Answer 7

C) 100 pg 166

Question 8

A winch requires 50 pound-feet maximum torque to operate. What size hydraulic motor is needed if maximum pressure is limited to 1,500 PSI? ______ pound-inches per 100 PSI A) 40 B) 50 C) 20 D) 70

Answer 8

A) 40 pg 167

Question 9

A 20 pound-inch motor operates with a torque load of 500 pound-inches. What is the operating pressure? A) 1,500 PSI B) 2,000 PSI C) 2,500 PSI D) 2,200 PSI

Answer 9

C) 2,500 pg 167

Question 10

Which of the following is not a class of hydraulic motors? A) LMPG B) HSLT C) Torque Actuator D) LSHT

Answer 10

“A) LMPG Notes: (pg. 170)
Hydraulic motors can be classified by application into 3 categories.
●(HSLT) High Speed, Low Torque
●(LSHT) Low Speed, High Torque
●(Torque Actuators) Limited Rotation Motors”

Question 11

In ‘balanced’ design motors the vanes are held out against the cam ring surface by the use of system? A) RPM B) Pressure C) Stroke length D) Thrust

Answer 11

B) Pressure pg 176

Question 12

In high performance vane motors, coil springs hold the vanes against the ring. The vanes are essentially in hydraulic? A) Rotation B) Flow C) Balance D) Revolution

Answer 12

C) Balance pg177

Question 13

Torque is developed in the in-line piston motor through the angular relastionship of the pistons to the? A) Vane B) Swash plate C) Cam ring D) Baffle

Answer 13

B) Swash plate pg 178

Question 14

When the displacement of a variable motor is increased, the torque availability is? A) Decreased B) Increased C) Stabilized D) Not changed

Answer 14

B) Increased

Question 15

The most efficient hydraulic motor is the ______ type. A) Gear B) Vane C) Piston D) Load

Answer 15

C) Piston pg 177

Question 16

Motor displacement is varied in response to workload changes by the ____ contol. A) Linear B) Torque C) Swash plate D) Compensator

Answer 16

D) Compensator pg 179

Question 17

Devices which usually cannot rotate continuously in one direction are? A) Torque actuators B) Variable generators C) Torque generators D) Both A and C

Answer 17

D) Both A and C

Question 18

Internal gear motors fall into two categories: Direct Drive and _______. A) Indirect B) Reverse C) Orbiting D) External

Answer 18

C) Orbiting pg 172

Question 19

A hydraulic motor which will not permit continuous rotation in either direction is a ____________ motor. A) Rotating vane B) Limited vane C) Reverse rotation D) Rotary piston

Answer 19

B) Limited rotation pg 171