INDUSTRIAL PNEUMATIC TECHNOLOGY choice which most correcty completes the staneme
ID: 2294058 • Letter: I
Question
INDUSTRIAL PNEUMATIC TECHNOLOGY choice which most correcty completes the stanement 64. In a pneumatic system, fuid fhow ocours when alir is allowed to After reading each statemert and the possible choices, circle the letter next to the A. Expand B. Cool C. Heat D. Compress 65. To absorb the kinetic energy of the atached moving masses and thus provide projection at the end of a piston's travel, a pneumatic cyflinder should be fimed with A. Cushions B. Check Vaives C. Stop Tubes D. Shuttle Valve ELECTRIC MOTORS DIRECTIONS: Select the letter of the choice which best completes the statement 66. When a circuit breaker has tripped, first be sure there is no voitage downstream; then A check the breaker's calibration B reset the breaker C. measure the motor's winding resistance D check for a system short 67. If the three phase voltages to a motor are equal, but the currents are not, A the motor is overloadedExplanation / Answer
64) D.compress [In pneumatic system, fluid flow occurs when air is allowed to compress]
Pneumatic system is a device that uses gas under pressure to apply force in order to move something
- It uses a device called a "compressor" to compress the air so pressure gets built up.
65) A)cushions [to absorb kinetic energy of attached moving masses and thus provide projection at the end of pitons travel, a pneumatic cylinder should be fitted with cushions]
A cushioning mechanism in a pneumatic cylinder utilizing a supplied air pressure, and a method of cushioning a piston in the pneumatic cylinder.
Mechanism: Cushioning chambers are provided at opposite ends of a cylinder body.Respective differential pressure valves and relief valves are provided between each of the cushioning chambers and an air supply. A cushioning member is disposed between each cushioning chamber and a cylinder bore. Air supplied under pressure from the air supply is stored in one of the cushioning chambers. When the piston is displaced to push the cushioning member, the air in the cushioning chamber is compressed to cushion the piston. As the cushioning member is moved a prescribed interval, the cushioning chamber is vented to atmosphere.
66) D) check for a system short [when the circuit breaker has tripped , first be sure that there is no voltage downstream; then "check for a system short"]
The three typical causes of circuit breaker trip are:
67) c) the voltages are not phased correctly [If the three phase voltages of a motor are equal but the currents are not "the voltages are not phased correctly"]