BASIC INSTRUMENTATION CH.8

Question 1

A SIGHT OR GAUAGE GLASS MOUNTED ON THE SIDE OF A LIQUID TANK IS TO GIVE A PHYSICAL LOCATION OF THE LEVEL IN THE TANK

Answer 1

FALSE

Question 2

LIQUID LEVEL MEASURED BY THE HYDROSTATIC METHOD IS WHERE THE LEVEL IS COMPUTED FROM PRESSURE: FOR EVERY FOOT OF VERTICAL HEIGHT A COLUMN OF WATER PRODUCES A PRESSURE OF APPROXIMATELY .433 PSI. P=.433GH WHERE G=SPECIFIC GRAVITY

Answer 2

TRUE

Question 3

ELECTRIC LIQUID LEVEL CONTROLLERS CAN BE USED FOR LOW AND HIGH LEVEL ALARMS DISCRETE LEVEL INDICATORS AND THEY CAN ALSO OPERATE MULTIPLE OUTFLOW PUMPS

Answer 3

TRUE

Question 4

A POPULAR METHOD OF LIQUID LEVEL MEASUREMENT USES A DIFFERENTIAL PRESSURE TRANSMITTER TO GENERATE A 4 - 20MA SIGNAL

Answer 4

TRUE

Question 5

TO RELIEVE THE LOAD ON A PUMPING SYSTEM MULTIPLE VARIABLE SPEED MOTORS CONNECTED PARALLEL MAY BE USED

Answer 5

TRUE

Question 6

LIQUID LEVEL CAN BE DETERMINED FROM THE WEIGHT OR HEAD PRESSURE THAT A LIQUID EXERTS IN A TANK

Answer 6

TRUE

Question 7

DIPSTICKS TAPES OR RODS ARE BETTER THAT GAUGE GLASSES BECAUSE A PERSON MUST CORRECTLY CHECK THEM TO OBTAIN AN ACCURATE LEVEL MEASUREMENT

Answer 7

FALSE

Question 8

FRICTION AND CHANGES IN THE SPECIFIC GRAVITY OF THE LIQUID IN PILOT-OPERATED LIQUID LEVEL CONTROLLERS CAN CAUSE ERRORS IN THE SYSTEM

Answer 8

TRUE