May'19 - Safety Online Quiz | Attempts: 279

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| By Hari

Hari

Community Contributor

Quizzes Created: 1 | Total Attempts: 279

Questions: 10 | Attempts: 279 | Updated: Mar 21, 2023

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Questions and Answers

1.

Acceptable oxygen levels for confined space entry are 16.5% to 18.5%.
- A.
  
  False
- B.
  
  True
Correct Answer
A. False

Explanation
The statement that acceptable oxygen levels for confined space entry are 16.5% to 18.5% is false. The acceptable oxygen levels for confined space entry should be between 19.5% and 23.5%. Oxygen levels below 19.5% can cause oxygen deficiency, leading to dizziness, confusion, and loss of consciousness. Oxygen levels above 23.5% can increase the risk of fire and explosion. It is crucial to ensure that the oxygen levels in confined spaces are within the acceptable range to maintain a safe working environment.

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2.

An attendant may leave the area of the confined entry for brief periods
- A.
  
  False
- B.
  
  True
Correct Answer
A. False

Explanation
The statement is false because an attendant should not leave the area of the confined entry for brief periods. The role of an attendant is to monitor the entry continuously and ensure the safety of the workers inside. Leaving the area even for a short time could pose a risk as the attendant may miss any potential hazards or emergencies that may arise. Therefore, it is important for the attendant to remain present and vigilant throughout the duration of the confined entry.

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3.

Atmospheres that contain a flammable component above what percent of its Lower Explosive Limit (LEL) are considered hazardous for confined space entry?
- A.
  
  10 percent
- B.
  
  7.5 percent
- C.
  
  7 percent
- D.
  
  2.5 percent
Correct Answer
A. 10 percent

Explanation
Atmospheres that contain a flammable component above 10 percent of its Lower Explosive Limit (LEL) are considered hazardous for confined space entry.

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4.

What does the acronym IDLH stand for with respect to confined spaces?
- A.
  
  Immediately Dangerous to Life or Health
- B.
  
  Instant Death Lurks Here
- C.
  
  Integrated and Differentiated Level of Hazards
- D.
  
  Inflammability Detection Level Hazard
Correct Answer
A. Immediately Dangerous to Life or Health

Explanation
The acronym IDLH stands for "Immediately Dangerous to Life or Health." This term is used to describe an atmosphere that poses an immediate threat to life, would cause irreversible health effects, or would impair an individual's ability to escape from a confined space. It is a critical concept in assessing the safety of confined spaces and determining the necessary precautions and protective measures to be taken.

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5.

Which of the following is included but not limited to confined spaces?
- A.
  
  Vessels
- B.
  
  Tanks
- C.
  
  Vaults
- D.
  
  Trenches
Correct Answer
D. Trenches

Explanation
Confined spaces refer to areas that are enclosed or partially enclosed, with limited access and ventilation. While vessels, tanks, and vaults are commonly known as confined spaces, trenches can also be included in this category. Trenches are narrow excavations in the ground, often used for construction or utility work. They can pose significant risks, such as cave-ins, lack of oxygen, or toxic gases, making them a type of confined space. Therefore, trenches are included but not limited to confined spaces.

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6.

Entering a permit space can prove fatal for an employee when the oxygen level is below 19.5
- A.
  
  TRUE
- B.
  
  FALSE
Correct Answer
A. TRUE

Explanation
Entering a permit space can prove fatal for an employee when the oxygen level is below 19.5. This is because oxygen is necessary for humans to breathe and function properly. When the oxygen level drops below 19.5%, it can lead to a condition called hypoxia, which can cause dizziness, confusion, and even loss of consciousness. In extreme cases, it can result in death. Therefore, it is crucial for employees to be aware of the oxygen levels in permit spaces to ensure their safety.

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7.

WORK PERMIT FOR CONFINED SPACE WORK SR is
- A.
  
  [SR][SMS][020204]
- B.
  
  [SR][SMS][020203]
- C.
  
  [SR][SMS][020201]
- D.
  
  [SR][SMS][020202]
Correct Answer
B. [SR][SMS][020203]

Explanation
The correct answer is [SR][SMS][020203]. This answer is correct because [SR][SMS][020203] specifically refers to the work permit for confined space work. The other options [SR][SMS][020204], [SR][SMS][020201], and [SR][SMS][020202] do not mention confined space work, so they are not the correct answer.

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8.

Definition of Confined Space is – Any person required / allowed to enter any chamber, tank, vat, pit, pipe, flue or any other confined space in which hazard of any gas, fume, vapour or dust is likely to be present / anticipated as to involve risk of inhalation by the concerned person, which may lead to intoxication / suffocation / fainting / injury / death
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The given statement defines a confined space as any area where there is a potential risk of gas, fume, vapor, or dust that could be inhaled by a person entering the space, which could lead to intoxication, suffocation, fainting, injury, or death. This definition accurately describes the characteristics of a confined space, making the answer "True" correct.

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9.

The man-hole dimensions meeting the statutory requirements: (a) (i) For rectangular or oval shape, minimum size required is shoulder width + 8 cm in length & 30 cm wide (ii) For circular shape, minimum size required is shoulder width + 8 cm in dia (B) (b) (i) For oval shape, minimum size required is 40.6 cm in length & 30.5 cm wide (ii) For circular shape, minimum size required is 40.6 cm
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The man-hole dimensions stated in option (a) and (b) meet the statutory requirements. For rectangular or oval shape man-holes, the minimum size required is the shoulder width + 8 cm in length and 30 cm wide. For circular shape man-holes, the minimum size required is the shoulder width + 8 cm in diameter. Option (b) specifies that for oval shape man-holes, the minimum size required is 40.6 cm in length and 30.5 cm wide, and for circular shape man-holes, the minimum size required is 40.6 cm. Since both options meet the specified requirements, the answer is True.

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10.

The portable hand lamp flame proof and having 24 volts supply is allowed inside the confined space
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The portable hand lamp is flame proof, meaning it is designed to prevent the ignition of flammable gases or vapors in the confined space. Additionally, it operates on a 24-volt supply, which reduces the risk of electrical hazards. Therefore, it is safe to use the lamp inside the confined space.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
May 23, 2019

Quiz Created by
Hari

May'19 - Safety Online Quiz

Acceptable oxygen levels for confined space entry are 16.5% to 18.5%.

An attendant may leave the area of the confined entry for brief periods

Atmospheres that contain a flammable component above what percent of its Lower Explosive Limit (LEL) are considered hazardous for confined space entry?

What does the acronym IDLH stand for with respect to confined spaces?

Which of the following is included but not limited to confined spaces?

Entering a permit space can prove fatal for an employee when the oxygen level is below 19.5

WORK PERMIT FOR CONFINED SPACE WORK SR is

The portable hand lamp flame proof and having 24 volts supply is allowed inside the confined space