Test 1

Question 1

1 atm in psi

Answer 1

14.7 PSI

Question 2

What is 1 psi in “H2O

Answer 2

27.7”H20

Question 3

Three accessories for pressure gauges

Answer 3

Oil filled, snubber, and chemical seal

Question 4

Use for snubbers on pressure gauges

Answer 4

Reduce oscillation in measurements (restricts flow in and out of gauge)

Question 5

Use for oil fill accessory in pressure gauge

Answer 5

Reduce effects of plant vibrations (reduces shock and extends gauge life)

Question 6

Use for chemical seal

Answer 6

Protect internal components from flow (corrosive, hot, slurry)

Question 7

1 psi to “Hg

Answer 7

2.04 “Hg

Question 8

1 psi to kPa

Answer 8

6.895 kPa

Question 9

1 bar to psi

Answer 9

14.5 psi

Question 10

1 bar to kPa

Answer 10

100 kPa

Question 11

1 “H2O to mmHg

Answer 11

1.87 mmHg

Question 12

1 “H2O to cmH2O

Answer 12

2.54cmH2O

Question 13

1 kg/cm^2

Answer 13

14.22 psi

Question 14

1 atm to bar

Answer 14

1.0135 bar

Question 15

1”Hg to “H2O

Answer 15

13.61 H2O

Question 16

Does volume matter for pressure?

Answer 16

No

Question 17

What is elevated based range?

Answer 17

When the LRV is below zero

Question 18

What is zero based range?

Answer 18

When the LRV is zero

Question 19

What is LRV?

Answer 19

Lower Range Value

Question 20

What is URV?

Answer 20

Upper Range Value

Question 21

What is suppressed based range

Answer 21

When the LRV is above zero

Question 22

What is the first step in a lab procedure?

Answer 22

Obtain the instruction manual(s)

Question 23

What mainly determines the cost of a pressure gauge?

Answer 23

Accuracy

Question 24

What are bourdon tubes usually made of?

Answer 24

Stainless steel (varying grades) or brass

Question 25

What are the three types of bourdon tubes?

Answer 25

C spring, spiral, helical

Question 26

What is the purpose of pressure elements?

Answer 26

Create mechanical motion from input pressure

Question 27

Accuracy of C spring

Answer 27

+/- 1% of span

Question 28

Typical range of C spring

Answer 28

0-10 psi, up to 0-20k psi

Question 29

What does the c shape in a c spring want to do as pressure is applied to it?

Answer 29

Straighten out

Question 30

Accuracy of spiral bourdon tube

Answer 30

+/- 0.5% of span

Question 31

What is span

Answer 31

URV-LRV

Question 32

Typical range of spiral bourdon tube

Answer 32

0-10 psi, up to 0-100k psi

Question 33

Accuracy of helical bourdon tube

Answer 33

+/- 1% of span

Question 34

Typical range of helical bourdon tube

Answer 34

0-30, up to 0-80k

Question 35

Min and max ranges of bellows element

Answer 35

Min: 0-2.5"H2O, Max: 0-2000 psi

Question 36

What easily damages bellows elements

Answer 36

Too much pressure

Question 36

Accuracy of bellows element

Answer 36

+/- 2% of span

Question 37

Min and Max range of diaphragm type element

Answer 37

Min: 0-0.5"H20, Max 0-3000 psi

Question 38

Accuracy of diaphragm type element

Answer 38

+/- 1% of span

Question 39

When is a pneumatic pressure transmitter used

Answer 39

When a signal is needed in a control loop

Question 40

What does a pneumatic pressure transmitter reproduce process pressure as?

Answer 40

Proper signal pressure

Question 41

What is a flapper nozzle used for

Answer 41

Convert mechanical motion to standard pneumatic signal

Question 42

What is the heart of near all pneumatic transmitters/controllers

Answer 42

Flapper nozzle/error detector

Question 43

What is the standard pressure applied to a fixed orifice/restriction

Answer 43

20 psi

Question 44

Three Types of Manometers

Answer 44

U Tube, Well, Incline

Question 45

Characteristics of U tube manometer

Answer 45

Clear tube bent into a u shape, labeled with graduated scale placed between vertical columns/legs, with scale marking going up above and below zero point

Question 46

Characteristics of Incline type Manometer

Answer 46

Reservoir serving at one end, measuring column at an angle from the horizontal to reduce vertical height

Question 47

Characteristics of Well type Manometer

Answer 47

Vertical glass tube connected to metal well, measuring liquid in well at same level as zero point on the tube scale

Question 48

What is a barometer

Answer 48

Type of manometer used to measure atmospheric pressure

Question 49

What is a diaphragm

Answer 49

a mechanical pressure sensor consisting of a thin, flexible disc that flexes in response to a change in pressure

Question 49

What is a capsule

Answer 49

a mechanical pressure sensor consisting of two convoluted metal diaphragms with their outer edges welded, brazed, or soldered together to provide an empty chamber between them