BASIC INSTRUMENTATION CH.4

Question 1

SPRING LOADED REGULATORS ARE POPULAR BECAUSE THEY ARE SIMPLE LIGHT IN WEIGHT AND REQUIRE LITTLE MAINTENANCE

Answer 1

TRUE

Question 2

LARGE CHANGES OF THE FLAPPER IN FRONT OF THE NOZZLE CAUSE CHANGES THROUGH THE FULL RANGE OF THE CONTROLLER IS WHY USE OF A NOZZLE AND FLAPPER ON A CONTROLLER

Answer 2

FALSE

Question 3

NAME 2 TYPES OF AIR RELAYS

Answer 3

CONTINUOUS BLEED
NON BLEED

Question 4

TO ACHIEVE AN INCREASE IN MOVEMENT AND ACTUATE THE FLAPPER IN A PROPORTIONAL CONTROLLER WHICH METHOD SHOULD BE CONSIDERED

Answer 4

THE ACTION OF THE MEASURING MEANS

Question 5

A BETTER SOLUTION FOR MECHANICAL RESET FOR A DEVICE IS TO HAVE IT RESET MANUALLY RATHER THAN AUTOMATICALLY

Answer 5

FALSE

Question 6

LIST 4 MODES OF CONTROLLING

Answer 6

-ON - OFF
-PROPORTIONAL PLUS RESET
-PROPORTIONAL PLUS RESET PLUS RATE
-PROPORTIONAL BAND

Question 7

PROPORTIONAL ACTION WORK IS ACHIEVED WHEN IT POSITIONS THE VLV IN PROPORTION TO CHANGE IN THE CONTROLLED VARIABLE

Answer 7

TRUE

Question 8

PNEUMATIC CONTROLLERS FOR COMMERCIAL APPLICATIONS USUALLY ARE OF WHAT CAPABILITY

Answer 8

PROPORTIONAL PLUS RESET PLUS RATE

Question 9

A BOOSTER RELAY IS USED TO OVERCOME RESPONSE LAG DUE TO LONG CONNECTING LINES BETWEEN THE CONTROLLER AND VLV

Answer 9

TRUE

Question 10

A BASIC PNEUMATIC POSITIONER USES WHAT TWO THINGS

Answer 10

-FIXED ORIFICE
-NOZZLE AND DIAPHRAM PRESSURE