Question 1

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

Accepted Answer

Proper design is crucial in preventing pressure hazards as it ensures that systems can handle expected pressures safely, reducing the risk of failure or accidents.

Question 2

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

Accepted Answer

Confined spaces have limited ventilation and can trap hazardous vapors and gases, which can pose a serious risk to workers. These hazards can lead to asphyxiation, explosions, and other dangers, making confined spaces a potentially deadly work environment.

Question 3

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

Accepted Answer

Pressure is defined as force per unit area, so it is the force exerted against an opposing fluid (like air or water) or distributed over a surface.

Question 4

Which of the following is not an inert gas?

Accepted Answer

Oxygen is not an inert gas; it is a reactive element that supports combustion and is essential for respiration.

Question 5

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

Accepted Answer

Approximately 21% of the atmosphere is oxygen, with the other 78% being nitrogen, and the remaining 1% consisting of other gases.

Question 6

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

Accepted Answer

This statement accurately describes what a boiler is.

Question 7

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

This definition of a confined space is accurate and is widely accepted in occupational health and safety regulations.

Question 8

To reduce pressure hazards, keep pressurized hoses as short as possible.

Accepted Answer

Shorter hoses reduce the risk of pressure loss and potential hazards from hose failure or whipping.

Question 9

Dalton's law states that the product of a given pressure and volume is constant with a constant temperature.

Accepted Answer

Dalton's law states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases, not about the product of pressure and volume.

Question 10

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

Accepted Answer

Oxygen is a reactive gas that can cause combustion hazards, unlike the inert gases listed which are not typically associated with safety hazards in pressurized vessels.

Question 11

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

Accepted Answer

A concentration below the LFL means the gas is not currently flammable, but it can still be hazardous due to potential accumulation or other risks.

Question 12

We perceive pressure in relation to the earth's atmosphere.

Accepted Answer

We perceive pressure in relation to the earth's atmosphere because atmospheric pressure is the force exerted by the weight of air in the atmosphere on a surface, and it affects how we experience pressure.

Question 13

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

Accepted Answer

Rapid ascent during diving or high-altitude flight can cause expansion of gas in the lungs leading to rupture if the ascent is too rapid. This is known as pulmonary barotrauma.

Question 14

Water vapor, although it is a gas, does not conform to which of the following?

Accepted Answer

The answer of Water vapor, although it is a gas,...

Question 15

What device is used to measure atmospheric pressure?

Accepted Answer

A barometer is specifically designed to measure atmospheric pressure.

Question 16

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

Accepted Answer

Ultrasonic testing is a non-destructive testing method used to detect internal flaws, while X-ray testing is also a non-destructive method used to see inside components without causing damage.

Question 17

Which of the following situations may cause a vacuum?

Accepted Answer

A vacuum is created when the pressure in a space is lower than the atmospheric pressure.

Question 18

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

Accepted Answer

The answer of Trapped gas effects are commonly known as...

Question 19

Radiocraphic tests are referred to as surface tests.

Accepted Answer

The answer of Radiocraphic tests are referred to as surface...

Question 20

Hyperoxia results in too little oxygen getting to body tissues.

Accepted Answer

Hyperoxia refers to an excess of oxygen in the body tissues, not a deficiency.

Quiz 19: Pressure and Confined Space Hazards