22 - Eat 7 Flashcards
Ram type cylinders are usually returned by? A) Revolution B) Rotation C) Gravity D) Flow
C) Gravity pg 149
Double-acting cylinders are returned by? A) Revolution B) Gravity C) Hydraulics D) Rotation
C) Hydraulics pg 151
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
D) 220.6 pg 157
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
C) 14,137 pg 157
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
C) 2,000 PSI pg 157
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
B) Revolution pg 164
Torque ratings of hydraulic motors are usually given in pound-inches or pound-feet per ______ PSI A) 25 B) 50 C) 100 D) 110
C) 100 pg 166
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
A) 40 pg 167
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
C) 2,500 pg 167
Which of the following is not a class of hydraulic motors? A) LMPG B) HSLT C) Torque Actuator D) LSHT
“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”
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
B) Pressure pg 176
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
C) Balance pg177
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
B) Swash plate pg 178
When the displacement of a variable motor is increased, the torque availability is? A) Decreased B) Increased C) Stabilized D) Not changed
B) Increased
The most efficient hydraulic motor is the ______ type. A) Gear B) Vane C) Piston D) Load
C) Piston pg 177
Motor displacement is varied in response to workload changes by the ____ contol. A) Linear B) Torque C) Swash plate D) Compensator
D) Compensator pg 179
Devices which usually cannot rotate continuously in one direction are? A) Torque actuators B) Variable generators C) Torque generators D) Both A and C
D) Both A and C
Internal gear motors fall into two categories: Direct Drive and _______. A) Indirect B) Reverse C) Orbiting D) External
C) Orbiting pg 172
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
B) Limited rotation pg 171
