309 Pneumatics

Question 1

IN A PNEUMATIC SYSTEM WHAT PROVIDES THE FORCE THAT PERFORMS WORK?

Answer 1

COMPRESSED AIR

Question 2

HOW MUCH WORK IS DONE BY A PISTON THAT EXERTS A FORCE OF 15LBS THROUGH A DISTANCE OF 10”

Answer 2

150 IN-LBS

Question 3

HEATING A GAS IN A SEALED RIGID CONTAINER WILL___THE____ OF THE GAS

Answer 3

INCREASE;PRESSURE

Question 4

2 CYLINDERS HAVING DIFFERENT DIAMETERS ARE CONNECTED BY AN AIR LINE. A FORCE APPLIED TO THE SMALLER PISTON MAKES IT MOVE. IN RESPONSE THE LARGER PISTON EXERTS A FORCE ON A LOAD AND MAKES IT MOVE. THE FORCE ON THE LOAD IS _____ THE FORCE APPLIED TO THE SMALLER PISTON AND THE DISTANCE THE LOAD MOVES IS _______ THE DISTANCE THE SMALLER PISTON MOVES.

Answer 4

GREATER THAN;LESS THAN

Question 5

WHEN AIR FLOWING IN A PIPE REACHES A SECTION WHERE THE DIAMETER IS REDUCED THE SPEED OF THE AIR _______AND ITS PRESSURE_________.

Answer 5

INCREASES;DECREASES

Question 6

A RECIPROCATING COMPRESSOR IS ONE KIND OF _______ COMPRESSOR.

Answer 6

POSITIVE-DISPLACEMENT

Question 7

IN A TYPICAL RECIPROCATING COMPRESSOR THE INTAKE VLVS ARE FORCED OPEN BY THE

Answer 7

ATMOSPHERIC PRESSURE

Question 8

THE PURPOSE OF AN INTERCOOLER BETWEEN THE STAGES OF A TWO STAGE COMPRESSOR IS TO REDUCE THE

Answer 8

POWER NEEDED TO RUN THE COMPRESSOR

Question 9

THE PURPOSES OF LUBRICATING OIL IN A COMPRESSOR ARE TO REDUCE FRICTION BETWEEN THE MOVING PARTS AND TO

Answer 9

IMPROVE THE COOLING OF THE COMPRESSOR

Question 10

THE ADVANTAGE OF UNLOADING A COMPRESSOR IS TO ALLOW IT TO

Answer 10

RUN WITHOUT DELIVERING AIR

Question 11

SINGLE STAGE SLIDING VANE COMPRESSORS CAN PRODUCE PRESSURES UP TO _______PSI

Answer 11

50

Question 12

ROTARY SCREW COMPRESSORS RUN AT SPEEDS RANGING FROM ______TO ________ RPM

Answer 12

3000;12000

Question 13

IMPELLER COMPRESSORS DELIVER AIR AT ______ VOLUME AND ________PRESSURE.

Answer 13

HIGH;LOW

Question 14

COMPARED TO OTHER KINDS OF COMPRESSORS CENTRIFUGAL COMPRESSORS

Answer 14

REQUIRE MORE POWER

Question 15

THE MOST EFFECTIVE METHOD OF REDUCING THE OUTPUT OF CENTRIFUGAL COMPRESSORS IS ______ , BUT MAY NOT WORK WELL IF THE REDUCTION IS TOO______

Answer 15

SPEED VARIATION; LARGE

Question 16

WATER OFTEN COLLECTS IN A PNEUMATIC SYSTEM BECAUSE WHEN AIR IS COMPRESSED ITS ______ DECREASES

Answer 16

MOISTURE CAPACITY

Question 17

THE MOST COMMON WAY TO REMOVE WATER VAPOR FROM THE AIR LEAVING A COMPRESSOR IS TO

Answer 17

COOL THE AIR

Question 18

WATER COOLED AFTERCOOLERS ARE TYPICALLY USED WITH _______-CAPACITY COMPRESSORS THAT RUN________

Answer 18

LARGE; TEN OR MORE

Question 19

A DESSICANT REMOVES WATER FROM AIR BY_______IT.

Answer 19

ABSORBING

Question 20

THE MAIN PURPOSE OF THE RECEIVERIN A PNEUMATIC SYSTEM IS TO

Answer 20

MAINTAIN PRESSURE DURING PEAK DEMAND

Question 21

THE OPERATION OF AN INERTIAL SEPARATOR DEPENDS ON A

Answer 21

RAPID CHANGE IN THE DIRECTION OF AIR FLOW

Question 22

OF THE PARTICLES LISTED BELOW THE SMALLEST ARE THE ________ PARTICLES

Answer 22

AEROSOL

Question 23

A FILTER CAN STOP 100% OF THE PARTICLES DOWN TO A SPECIFIED MINIMUM SIZE. THIS SIZE IS CALLED THE FILTER’S ______RATING

Answer 23

ABSOLUTE

Question 24

AN ADVANTAGE OF WETTED FILTERS OVER DRY FILTERS IS THAT WETTED FILTERS

Answer 24

CAN BE CLEANED MANY TIMES

Question 25

A FINE MIST LUBRICATOR SHOULD BE USED IN A PNEUMATIC SYSTEM IF THE AIR FLOW IS _______ AND/OR THE DISTANCE TO THE EQUIPMENT IS_________

Answer 25

INTERMITTENT; LONG

Question 26

LAMINAR AIRFLOW IN A PIPING SYSTEM IS MADE TURBULENT BY

Answer 26

CONSTRICTIONS IN THE PIPE

Question 27

GREATER PRESSURE LOSSES OCCUR IN A PNEUMATICS SYSTEM IF THE AIR IS AT ______ PRESSURE BECAUSE OF GREATER________.

Answer 27

LOW; FRICTION

Question 28

WHEN USED AS A COMPRESSOR DISCHARGE LINE A PIPE REN SHOULD SLOPE______ IN THE DIRECTION OF THE AIRFLOW BY 1" FOR EVERY ________FT OF PIPE

Answer 28

DOWNWARD; 10

Question 29

WHEN SHOULD YOU USE PIPE JOINT COMPOUND IN CONNECTING NPT-THREADED PIPE

Answer 29

ALWAYS

Question 30

IF AN AIR HOSE IS NOT COMPLETELY DEPRESSURIZED WHEN YOU DISCONNECT IT THE GREATEST DANGER TO YOU IS A SUDDEN

Answer 30

BLOWING OF DUST OR CHIPS

Question 31

A FOUR-WAY VLV HAS FOUR

Answer 31

CONNECTING PORTS

Question 32

THE _______ VLV IS A GOOD THROTTLING DEVICE AND IS SUITABLE FOR HIGH-PRESSURE SERVICE IT CAUSES ______ PRESSURE LOSS IN THE LINE.

Answer 32

NEEDLE; HIGH

Question 33

THE SPOOL IN A VLV CONTROLS THE FLOW OF AIR BY _______ FROM ONE POSITION TO ANOTHER. IN A HIGH PRESSURE SYSTEM THE SPOOL IS _______ TO MOVE

Answer 33

SLIDING;EASY

Question 34

AN ADVANTAGE OF FOUR WAY VLVS OVER TWO AND THREE WAY VLVS IS THAT THEY

Answer 34

SIMPLIFY THE CONTROLS

Question 35

A VLV HAS FIVE CONNECTING PORTS TWO OF WHICH ARE EXHAUST PORTS. THIS VLV IS A ________ VLV

Answer 35

FOUR-WAY

Question 36

THE CRACKING PRESSURE OF A SIMPLE POPPET TYPE RELIEF VLV IS DETERMINED BY THE

Answer 36

SPRING ADJUSTMENT

Question 37

A DIAPHRAGM TYPE RELIEF VLV RESPONDS VERY QUICKLY TO A PRESSURE CHANGE BECAUSE OF ITS

Answer 37

LARGE PRESSURE SENSITIVE AREA

Question 38

THE ONLY PURPOSE OF A PRESSURE RELIEF VLV IS TO

Answer 38

PROTECT THE SYSTEM FROM DAMAGE

Question 39

AN INCREASE IN PRESSURE ON THE SECONDARY SIDE OF A PRESSURE REGULATING VLV ______ THE VLV

Answer 39

SLIGHTLY CLOSES

Question 40

THE BEST WAY TO GUARD AGAINST EXCESSIVE PRESSURE ON THE SECONDARY SIDE OF A PRESSURE REGULATOR IS TO

Answer 40

USE A REGULATOR WITH A BUILT IN RELIEF VLV

Question 41

THE THRUST THAT CAN BE APPLIED WHEN THE ROD OF A SINGLE ROD DOUBLE ACTING PNEUMATIC CYLINDER IS MOVING OUT OF THE CYLINDER IS _____ THE THRUST THAT CAN BE APPLIED WHEN THE ROD IS MOVING INTO THE CYLINDER

Answer 41

GREATER THAN

Question 42

AN INTERNAL SPRING IS SOMETIMES USED TO RETURN THE PISTON IN A ______-ACTING _______-ROD PNEUMATIC CYLINDER

Answer 42

SINGLE;SINGLE

Question 43

THE MAIN PURPOSE OF AN EXHAUST FLOW CONTROL METERING VLV ON A PNEUMATIC CYLINDER IS TO

Answer 43

LIMIT THE RETURN STROKE SPEED

Question 44

A CYLINDER THAT MUST BE FREE TO PIVOT REQUIRES A _________ MOUNTING

Answer 44

TRUNNION OR CLEVIS

Question 45

YOU CAN DETERMINE WHETHER A CONTROL VLV CAN DELIVER AIR RAPIDLY ENOUGH FOR A CYLINDER BY CALCULATING THE ________ REQUIRED BY THE VLV

Answer 45

CAPACITY COEFFICIENT

Question 46

THE HIGHEST TORQUE A PNEUMATIC MOTOR CAN EXERT ON A LOAD IS IT _______ TORQUE

Answer 46

STALLING

Question 47

THE HORSEPOWER OF A PNEUMATIC MOTOR VARIES WITH THE ________ AND THE ______ OF THE MOTOR SHAFT.

Answer 47

SPEED;TORQUE

Question 48

THE HIGHEST POWER OUTPUT OF A PNEUMATIC MOTOR OCCURS WHEN ITS SPEED IS

Answer 48

MEDIUM

Question 49

AN AXIAL PISTON PNEUMATIC MOTOR TRANSMITS FORCE FOR THE PISTON TO THE OUTPUT SHAFT BE MEANS OF A

Answer 49

CAM PLATE AND GEARS

Question 50

AIR PRESSURE OF 100PSI CAN CREATE HYDRAULIC PRESSURE OF 1000PSI IF AN AIR PISTON DRIVES A ________ HYDRAULIC PISTON

Answer 50

SMALLER DIAMETER