# PTEC 131 - Exam 2 - Fall 14

44 Questions | Attempts: 147
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Provide an example of how both force and area affect pressure.
• 2.
Pressure is defined as ____________
• A.

Pounds per unit of area

• B.

Inches per unit of area

• C.

Force applied to a unit area

• D.

Flow per unit of area

• 3.
The density of a substance relative to the density of water
• A.

Inches of mercury

• B.

Inches of water

• C.

Bars

• D.

Specific gravity

• 4.
Mass per unit volume
• A.

Specific gravity

• B.

density

• C.

Pressure

• D.

Force

• 5.
Instrument used to measure the difference between two pressure points
• A.

Manometer

• B.

Capacitance transducer

• C.

Differential pressure cell

• D.

Strain gauge transducer

• 6.
Small measurement of pressure equal to 0.036 psi at 4 degrees Celsius
• A.

Inches of mercury

• B.

Inches of water

• C.

Bars

• D.

Specific gravity

• 7.
Device that contains a measurement diaphragm and capacitor plates
• A.

Manometer

• B.

Capacitance transducer

• C.

Differential pressure cell

• D.

Strain gauge transducer

• 8.
Measurement of pressure equal to 0.987 atmospheres
• A.

Inches of mercury

• B.

Inches of water

• C.

Bars

• D.

Specific gravity

• 9.
Measures the level of mercury in pounds per cubic inch
• A.

Inches of mercury

• B.

Inches of water

• C.

Bars

• D.

Specific gravity

• 10.
Pressure measuring device consisting of a group of wires that stretch when pressure is applied.
• A.

Manometer

• B.

Capacitance transducer

• C.

Differential pressure cell

• D.

Strain gauge transducer

• 11.
Pressure measuring device with two fluid chamber tube gauges connected by a U-shaped tube.
• A.

Manometer

• B.

Capacitance transducer

• C.

Differential pressure cell

• D.

Strain gauge transducer

• 12.
Atmospheric pressure at sea level is ________  PSIA.
• A.

0

• B.

2

• C.

27.7

• D.

14.7

• 13.
Atmospheric pressure at sea level is ________  PSIG.
• A.

0

• B.

2

• C.

27.7

• D.

14.7

• 14.
The most common measurement scale for a manometer is ___________.
• A.

Bars

• B.

PSIA

• C.

Inches of Mercury

• D.

Inches of Water

• 15.
The most common measurement scale used for vacuum is ________________.
• A.

Bars

• B.

PSIA

• C.

Inches of Mercury

• D.

Inches of Water

• 16.
PSIA stands for  ______________________.
• A.

Pounds per square inch atmosphere

• B.

Pounds per square inch average

• C.

Pounds per square inch absolute

• D.

Pressure per inch absolute

• 17.
Pressure is increased when:
• A.

The number of molecules per unit of area is decreased

• B.

Heavier molecules per unit area are introduced

• C.

Molecules begin to move faster

• D.

The number of molecules are spread out over a larger unit area.

• 18.
When calculating pressure, liquids and gases are considered as fluids.
• A.

True

• B.

False

• 19.
Directions:  Convert 100 inches H2O to psig using the following Conversion Chart to make the following conversions.   Conversion ChartConvert psig to psiapsig + 14.7Convert psia to psigpsia - 14.7Convert psig to inches of H2Opsig x 27.7Convert psig to inches of Hgpsig x 2.04Convert inches of H2O to psigheight of liquid          27.7Convert inches Hg to psigheight of liquid          2.04 New Units      =      Known Units       x      New Eq Units                                     Known Eq Units
• A.

204

• B.

49.01

• C.

3.61

• D.

2770

• 20.
Directions:  Convert 4.47 inches Hg to psig using the following Conversion Chart.                                                Conversion ChartConvert psig to psiapsig + 14.7Convert psia to psigpsia - 14.7Convert psig to inches of H2Opsig x 27.7Convert psig to inches of Hgpsig x 2.04Convert inches of H2O to psigheight of liquid  27.7Convert inches Hg to psigheight of liquid  2.04 New Units      =      Known Units       x      New Eq Units                                         Known Eq Units
• A.

2.19

• B.

9.11

• C.

123.81

• D.

19.17

• 21.
Directions:  Convert 3 psi to inches H2O using the following Conversion Chart.                                                      Conversion ChartConvert psig to psiapsig + 14.7Convert psia to psigpsia - 14.7Convert psig to inches of H2Opsig x 27.7Convert psig to inches of Hgpsig x 2.04Convert inches of H2O to psigheight of liquid     27.7Convert inches Hg to psigheight of liquid   2.04 New Units      =      Known Units       x      New Eq Units                                       Known Eq Units
• A.

249.30

• B.

83.10

• C.

20.70

• D.

6.12

• 22.
Directions:  Convert 24.2 inches Hg to inches H2O using the following Conversion Chart.                                                       Conversion ChartConvert psig to psiapsig + 14.7Convert psia to psigpsia - 14.7Convert psig to inches of H2Opsig x 27.7Convert psig to inches of Hgpsig x 2.04Convert inches of H2O to psigheight of liquid 27.7Convert inches Hg to psigheight of liquid2.04 New Units      =      Known Units       x      New Eq Units                                  Known Eq Units
• A.

328.60

• B.

49.36

• C.

670.34

• D.

0.49

• 23.
Directions:  Convert 50 inches H2O to psig using the following Conversion Chart.                       Conversion ChartConvert psig to psiapsig + 14.7Convert psia to psigpsia - 14.7Convert psig to inches of H2Opsig x 27.7Convert psig to inches of Hgpsig x 2.04Convert inches of H2O to psigheight of liquid 27.7Convert inches Hg to psigheight of liquid2.04 New Units      =      Known Units       x      New Eq Units                                  Known Eq Units
• A.

24.50

• B.

1385

• C.

1.81

• D.

102.00

• 24.
Directions:  Convert 23.2 inches H2O to psig using the following Conversion Chart.                                                      Conversion ChartConvert psig to psiapsig + 14.7Convert psia to psigpsia - 14.7Convert psig to inches of H2Opsig x 27.7Convert psig to inches of Hgpsig x 2.04Convert inches of H2O to psigheight of liquid  27.7Convert inches Hg to psigheight of liquid   2.04 New Units      =      Known Units       x      New Eq Units                                       Known Eq Units
• A.

8.5

• B.

11.37

• C.

642.64

• D.

0.84

• 25.
Directions:  Convert 300 inches H2O to inches Hg using the following Conversion Chart.                                                         Conversion ChartConvert psig to psiapsig + 14.7Convert psia to psigpsia - 14.7Convert psig to inches of H2Opsig x 27.7Convert psig to inches of Hgpsig x 2.04Convert inches of H2O to psigheight of liquid   27.7Convert inches Hg to psigheight of liquid  2.04 New Units      =      Known Units       x      New Eq Units                                     Known Eq Units
• A.

10.83

• B.

147.05

• C.

22.09

• D.

220.90

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