Question 1

Hyperoxia results in too little oxygen getting to body tissues.

Accepted Answer

A) True 
 B)False  False

Question 2

Radiocraphic tests are referred to as surface tests.

Accepted Answer

A) True 
 B)False  True

Question 3

Pressure is the force exerted against an opposing fluid or thrust distributed over a surface.

Accepted Answer

A) True 
 B)False  True

Question 4

A confined space is any area with limited means of entry and exit that is large enough for a person to fit into but is not designed for occupancy.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is not a safety hazard associated with boilers and other pressurized vessels?

Accepted Answer

A)  Helium 
B)  Argon 
C)  Krypton 
D)  Xenon 
E)  Oxygen 
A)  Helium 
B)  Argon 
C)  Krypton 
D)  Xenon 
E)  Oxygen

Question 6

Trapped gas effects are commonly known as "the bends."

Accepted Answer

A) True 
 B)False

Question 7

The most effective preventive measure for overcoming potential pressure hazards is proper design.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following not-destructive testing methods is referred to as a volumetric test?

Accepted Answer

A)  Radiography 
B)  Visual 
C)  Liquid penetration 
D)  Magnetic particle 
E)  Pressure test 
A)  Radiography 
B)  Visual 
C)  Liquid penetration 
D)  Magnetic particle 
E)  Pressure test

Question 9

Ultrasonic and X-ray waves are forms of destructive testing methods used to detect cracks or leaks.

Accepted Answer

A) True 
 B)False

Question 10

What device is used to measure atmospheric pressure?

Accepted Answer

A)  Pressure vessel 
B)  Ultrasound meter 
C)  Barometer 
D)  Vacuum gauge 
E)  Proof pressure meter 
A)  Pressure vessel 
B)  Ultrasound meter 
C)  Barometer 
D)  Vacuum gauge 
E)  Proof pressure meter

Question 11

Which of the following is not an inert gas?

Accepted Answer

A)  Helium 
B)  Argon 
C)  Krypton 
D)  Xenon 
E)  Oxygen 
A)  Helium 
B)  Argon 
C)  Krypton 
D)  Xenon 
E)  Oxygen

Question 12

Confined spaces are hazardous because of the potential to trap toxic and/or explosive vapors and gases.

Accepted Answer

A) True 
 B)False

Question 13

A confined space with a concentration of flammable gasses below the lower flammable limit (LFL) is a safe working environment.

Accepted Answer

A) True 
 B)False

Question 14

Before entering a confined space to do a 3 to 5 minute valve replacement, samples are taken of the air inside. The following data is known about the gases present: TLV = 100 ppm
LFL = 500 ppm
UFL = 2000 ppm
Actual concentration measured = 2100 ppm
What would be considered a safe concentration?

Accepted Answer

A)  Below 50 ppm 
B)  Below 100 ppm 
C)  Below 500 ppm 
D)  Above 2000 ppm 
E)  Above 2100 ppm 
A)  Below 50 ppm 
B)  Below 100 ppm 
C)  Below 500 ppm 
D)  Above 2000 ppm 
E)  Above 2100 ppm

Question 15

A swift return to the surface from diving or decompression during high-altitude flight may cause lung rupture.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following actions should be taken before entering a confined space?

Accepted Answer

A)  Shut down equipment 
B)  Test the atmosphere 
C)  Ventilate the space 
D)  Attach a lifeline 
E)  All of the above 
A)  Shut down equipment 
B)  Test the atmosphere 
C)  Ventilate the space 
D)  Attach a lifeline 
E)  All of the above

Question 17

What is an adequate amount of oxygen present in a confined space before entering with a non-supplied air respirator?

Accepted Answer

A)  Between 1 and 2% 
B)  Between 2 and 4% 
C)  Between 4 and 8% 
D)  Between 10 and 16% 
E)  Between 18 and 22% 
A)  Between 1 and 2% 
B)  Between 2 and 4% 
C)  Between 4 and 8% 
D)  Between 10 and 16% 
E)  Between 18 and 22%

Question 18

A boiler is an open vessel in which water is heated to form steam, hot water, or high temperature water under pressure.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following situations may cause a vacuum?

Accepted Answer

A)  Shock waves 
B)  Pressures below the atmospheric level 
C)  High-temperature water 
D)  Ultrasonic waves 
E)  Excessive air exchanged in a container 
A)  Shock waves 
B)  Pressures below the atmospheric level 
C)  High-temperature water 
D)  Ultrasonic waves 
E)  Excessive air exchanged in a container

Question 20

Approximately 79% of the atmosphere is oxygen, with the other 21% being nitrogen.

Accepted Answer

A) True 
 B)False

Exam 19: Pressure and Confined Space Hazards

Hyperoxia results in too little oxygen getting to body tissues.

Radiocraphic tests are referred to as surface tests.

Pressure is the force exerted against an opposing fluid or thrust distributed over a surface.

A confined space is any area with limited means of entry and exit that is large enough for a person to fit into but is not designed for occupancy.

Which of the following is not a safety hazard associated with boilers and other pressurized vessels?

Trapped gas effects are commonly known as "the bends."

The most effective preventive measure for overcoming potential pressure hazards is proper design.

Which of the following not-destructive testing methods is referred to as a volumetric test?

Ultrasonic and X-ray waves are forms of destructive testing methods used to detect cracks or leaks.

What device is used to measure atmospheric pressure?

Which of the following is not an inert gas?

Confined spaces are hazardous because of the potential to trap toxic and/or explosive vapors and gases.

A confined space with a concentration of flammable gasses below the lower flammable limit (LFL) is a safe working environment.

Before entering a confined space to do a 3 to 5 minute valve replacement, samples are taken of the air inside. The following data is known about the gases present: TLV = 100 ppm LFL = 500 ppm UFL = 2000 ppm Actual concentration measured = 2100 ppm What would be considered a safe concentration?

A swift return to the surface from diving or decompression during high-altitude flight may cause lung rupture.

Which of the following actions should be taken before entering a confined space?

What is an adequate amount of oxygen present in a confined space before entering with a non-supplied air respirator?

A boiler is an open vessel in which water is heated to form steam, hot water, or high temperature water under pressure.

Which of the following situations may cause a vacuum?

Approximately 79% of the atmosphere is oxygen, with the other 21% being nitrogen.

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