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Advanced Pneumatics Study Guide Questions & And Answers
As soon as air begins to flow through a pressure regulator, the downstream begins to drop off. This characteristic is called ____________.
a. droop
b. fade
c. sag
d. taper - droop
The function of an air bearing is to ______________.
a. reduce the free air consumption of a pneumatic motor
b. provide support to a pneumatic cylinder rod for an eccentric load
c. reduce friction on a motor shaft
d. provide a cushion between two surfaces - provide a cushion between two surfaces
Internal cushions in a pneumatic cylinder ____________.
a. provide a slight bounce to a load
b. provide for eccentric loads on a piston
c. trap exhaust air to slow the piston to a safe stop
d. are only used for test purposes and must be removed for normal use. - trap exhaust air to slow the piston to a safe stop
The amount of torque a pneumatic motor will generate when it begins to turn from a stopped condition is called the ___________.
a. starting torque of the motor
b. running torque of the motor
c. breakaway torque of the load
d. running torque of the load - starting torque of the motor
When a piston starts its stroke, it must ____________.
a. accelerate to full speed
b. decelerate immediately
c. maintain constant velocity
d. wait for a buildup of air pressure - accelerate to full speed
When selecting a pneumatic motor, it is common practice to use ______________ of the available pressure at the motor to determine motor size.
a. 1/
b. 1/
c. 2/
d. 3/4 - 2/
A stop tube helps reduce cylinder rod bearing wear due to ______________.
a. overheating
b. overspeeds
c. side loads
d. low air pressure - side loads
A photo tachometer _______________.
a. uses a beam of light pointed at the motor's shaft
b. must be in contact with the rotating shaft
c. is built into the pneumatic motor
When a load is pulled, is it called a _________ load.
a. bilateral
b. transverse
c. compression
d. tension - tension
The free air flow rates for air motors are obtained from air consumption versus ___________ graphs.
a. RPM
b. BTU
c. IPS
d. LPM - RPM
_________________ mounted cylinders are used where the cylinder body must rotate as the cylinder operates.
a. foot
b. flush
c. clevis
d. flange - clevis
A special type of valve that increases the exhaust flow to minimize the effects of decaying exhaust pressure in a cylinder is called a ____________ valve.
a. standard
b. quick
c. lateral
d. retracting - quick
Air bearing size depends on the air pressure and the ____________.
a. load being moved
b. surface smoothness
c. venturi oriface size
d. air speed - load being moved
Pneumatic motor torque is defined as a _____________ force.
a. reciprocating
b. lifting
c. turning
d. static - turning
If the load on the shaft of an air motor increases, the air motor will _________________.
a. speed up
b. slow down
c. maintain constant speed
d. stop - slows down
A regulator and a __________ way valve works well in a double-acting cylinder circuit such as a lift table.
a. 3
b. 2
c. 4
d. 6 - 3
a. vacuum
b. partial vacuum
c. vacuum pressure
d. all of the above
e. none of the above - all of the above
Vacuum pressures can be expressed in ______________.
a. Psia/kPa absolute
b. BTUs
c. Onces/ft
d. RPMs - Psia/kPa absolute
For liminar flow, pressure drops in the throat of the venturi in accordance with _____________.
a. Pascal's law
b. Torricelli's scale
c. Law of averages
d. Bernoulli's law - Bernoulli's law
To increase the holding force of a vacuum gripper ______________.
a. Increase the gripper size
b. Decrease the vacuum level
c. Remove any cup reinforcement to retain cup size and surface area
d. all of the above
e. none of the above - increase the gripper size
Vacuums are measured with a _________________.
a. vacuum transducer
b. venturi
c. manometer
d. vacuum cup - manometer
The well-type manometer uses a(n) _____________ scale.
a. inclined
b. vertical
c. horizontal
d. curved - inclined
The advantage vacuum pumps have over vacuum generators is ________________.
a. cost
b. size
c. capacity
d. easier maintenance - capacity
When a load is pulled it is considered a __________
a. tension load
b. thrust load (compression) - tension load
When a load is pushed it is considered a __________
a. tension load
b. thrust load (compression) - thrust load (compression)
What is the appropriate mounting style for a cylinder used to form a sheet metal around a die?
a. foot
b. flange
c. flush
d. trunnion
e. clevis - foot
What is the appropriate mounting style if you have limited space.
a. foot
b. flange
c. flush
d. trunnion
e. clevis - flush
_________ air pressure on the reverse stroke of a cylinder opposes the driving force. - decaying
The drop off characteristic of pressure regulators is called _____. - droop
The regulator is not capable of holding its pressure once ________. - air begins to flow
The quick exhaust valves are used to rapidly remove cylinders ____ _______. - back pressure
Quick exhaust valves are mounted _______ to the cylinder.
a. directly
b. parallel
c. flange - directly
A quick exhaust valve has _____ ports.
a. four
b. two
c. five
d. three - three
A ____ ____ is a length of tubing placed in the rod side of a cylinder to stop the cylinder rod before it fully extends. - stop tube
The ____ ____ reduces the load on the cylinders rod bearing and helps prevent bearing wear. - stop tube
Oversized rods are used with air cylinders to prevent rods from bending due to _________ loads. - eccentric
Air cylinders are purposely oversized to account for the added loads of ________.
a. friction
b. back pressure
c. acceleration
d. all of the above - all of the above
Cylinder flow rates are expressed in ____ ___ terms. - free air
Stop tubes are used in cylinder to_______. - prevents rod bearing failure
a. starting torque of motor
b. running torque of load
c. breakaway torque of load
d. running torque of motor - running torque of motor
Amount of torque needed to turn the load at a given speed.
a. starting torque of motor
b. running torque of load
c. breakaway torque of load
d. running torque of motor - running torque of the load
If the load on the motor shaft increases the air motor will ____ ____. - slow down
It is common to use ____ of the available pressure at the motor to determine if the motor will perform properly.
a. 1/
b. 1/
c. 1/
d. 2/
e. 3/4 - 2/
Torque is known as a turning ______. - force
Motor air consumption is needed to properly size ______ and air preparation equipment.
a. the rod
b. the cylinder
c. valves
d. none of the above - valves
At a given pressure, air motor torque output decreases as speed increases due to increased ______ ________. - friction losses
Industry uses vacuums to __________.
a. lift heavy loads
b. form thin materials
c. stamp sheet metal
d. drill thin materials - form thin materials
What are two type of cylinder loads??? - Tension, compression(thrust)
