Question 1

In most Canadian jurisdictions, what level of dB(A) is considered the maximum limit of continuous exposure over eight hour days without protection?

Accepted Answer

A)  150 
B)  115 
C)  85 
D)  20 
E)  3 
A)  150 
B)  115 
C)  85 
D)  20 
E)  3 C

Question 2

As the duration of the exposure is decreased, the permissible level is decreased.

Accepted Answer

A) True 
 B)False  False

Question 3

Lex. This is an abbreviation for average exposure level adjusted for an 8-hour day.

Accepted Answer

A) True 
 B)False  True

Question 4

To decrease the risk of hearing loss, exposure to noise should be limited to a maximum 8-hour, time-weighted average of 90 dB(A).

Accepted Answer

A) True 
 B)False

Question 5

Sound is any change in pressure that can be detected by the ear.

Accepted Answer

A) True 
 B)False

Question 6

Which hearing protection device provides the best filtering of a broad range of frequencies?

Accepted Answer

A)  Enclosures 
B)  Earplugs 
C)  Superaural caps 
D)  Flat-attenuation HPDs 
E)  Canal-cap-style HPDs 
A)  Enclosures 
B)  Earplugs 
C)  Superaural caps 
D)  Flat-attenuation HPDs 
E)  Canal-cap-style HPDs

Question 7

Sound and vibration are very similar. Which of the following statements are true?

Accepted Answer

A)  Sound relates to a sensation 
B)  Vibration is inaudible 
C)  Vibration is perceived through the sense of touch 
D)  Sound and vibration can have a wide range of frequencies 
E)  All of the above 
A)  Sound relates to a sensation 
B)  Vibration is inaudible 
C)  Vibration is perceived through the sense of touch 
D)  Sound and vibration can have a wide range of frequencies 
E)  All of the above

Question 8

Noise control strategies include which of the following?

Accepted Answer

A)  Noise can be reduced at the receiver by enclosing the worker. 
B)  Noise can be reduced along its path by moving the source farther away. 
C)  Noise can be reduced at its source by enclosing the source. 
D)  Noise can be reduced at its source through tool selection. 
E)  All of the above 
A)  Noise can be reduced at the receiver by enclosing the worker. 
B)  Noise can be reduced along its path by moving the source farther away. 
C)  Noise can be reduced at its source by enclosing the source. 
D)  Noise can be reduced at its source through tool selection. 
E)  All of the above

Question 9

The threshold of hearing is the maximum level of sound that can be perceived without experiencing pain.

Accepted Answer

A) True 
 B)False

Question 10

Conducting noise surveys involves measuring noise levels at different locations in the workplace.

Accepted Answer

A) True 
 B)False

Question 11

The unit of measurement for sound is the decibel, or one-tenth of a bel.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is the name given to reduction of sound transmission using materials and/or structural elements?

Accepted Answer

A)  Active noise reduction 
B)  Parallel noise reduction 
C)  Structural noise reduction 
D)  Engineering controls 
E)  Passive noise reduction 
A)  Active noise reduction 
B)  Parallel noise reduction 
C)  Structural noise reduction 
D)  Engineering controls 
E)  Passive noise reduction

Question 13

Raynaud's syndrome is also known by which term?

Accepted Answer

A)  Noise-induced hearing loss 
B)  Sensorineural loss 
C)  Tinnitus 
D)  Threshold shift 
E)  Hand-arm vibration syndrome 
A)  Noise-induced hearing loss 
B)  Sensorineural loss 
C)  Tinnitus 
D)  Threshold shift 
E)  Hand-arm vibration syndrome

Question 14

Fit testing is an important prerequisite for effective noise protection.

Accepted Answer

A) True 
 B)False

Question 15

Medical professionals have not yet established a procedure for determining if there is a causal relationship between workplace noise and hearing loss.

Accepted Answer

A) True 
 B)False

Question 16

What sound level would most likely be encountered in a quiet office setting?

Accepted Answer

A)  6 dB(
A)  
B)  20 dB(
A)  
C)  50 dB(
A)  
D)  90 dB(
A)  
E)  110 dB(
A)  
A)  6 dB(
A)  
B)  20 dB(
A)  
C)  50 dB(
A)  
D)  90 dB(
A)  
E)  110 dB(
A)

Question 17

Trying out HPDs to determine how they fit with an individual's anatomical features is known as what?

Accepted Answer

A)  Trial PPE run 
B)  Fit testing 
C)  PPE testing 
D)  PPE run-through 
E)  Attenuation 
A)  Trial PPE run 
B)  Fit testing 
C)  PPE testing 
D)  PPE run-through 
E)  Attenuation

Question 18

If the maximum permitted exposure level for an 8-hour workday is 87 dB(A), with an exchange rate of 2 dB, what is the exposure limit for 2 hours?

Accepted Answer

A)  83 dB(
A)  
B)  85 dB(
A)  
C)  87 dB(
A)  
D)  89 dB(
A)  
E)  91 dB(
A)  
A)  83 dB(
A)  
B)  85 dB(
A)  
C)  87 dB(
A)  
D)  89 dB(
A)  
E)  91 dB(
A)

Question 19

Which form of noise control is considered to have the least practical application in industrial settings?

Accepted Answer

A)  PPE 
B)  Engineering controls 
C)  Administrative controls 
D)  Sound-absorbing materials 
E)  Ear muffs 
A)  PPE 
B)  Engineering controls 
C)  Administrative controls 
D)  Sound-absorbing materials 
E)  Ear muffs

Question 20

The exchange rate indicates the increase in sound level that is permitted as the time of exposure is doubled.

Accepted Answer

A) True 
 B)False

Exam 23: Noise and Vibration Hazards

In most Canadian jurisdictions, what level of dB(A) is considered the maximum limit of continuous exposure over eight hour days without protection?

As the duration of the exposure is decreased, the permissible level is decreased.

Lex. This is an abbreviation for average exposure level adjusted for an 8-hour day.

To decrease the risk of hearing loss, exposure to noise should be limited to a maximum 8-hour, time-weighted average of 90 dB(A).

Sound is any change in pressure that can be detected by the ear.

Which hearing protection device provides the best filtering of a broad range of frequencies?

Sound and vibration are very similar. Which of the following statements are true?

Noise control strategies include which of the following?

The threshold of hearing is the maximum level of sound that can be perceived without experiencing pain.

Conducting noise surveys involves measuring noise levels at different locations in the workplace.

The unit of measurement for sound is the decibel, or one-tenth of a bel.

Which of the following is the name given to reduction of sound transmission using materials and/or structural elements?

Raynaud's syndrome is also known by which term?

Fit testing is an important prerequisite for effective noise protection.

Medical professionals have not yet established a procedure for determining if there is a causal relationship between workplace noise and hearing loss.

What sound level would most likely be encountered in a quiet office setting?

Trying out HPDs to determine how they fit with an individual's anatomical features is known as what?

If the maximum permitted exposure level for an 8-hour workday is 87 dB(A), with an exchange rate of 2 dB, what is the exposure limit for 2 hours?

Which form of noise control is considered to have the least practical application in industrial settings?

The exchange rate indicates the increase in sound level that is permitted as the time of exposure is doubled.

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