CAOHC Noise Measurement and Control 2

Question 1

What instrument is used to measure a worker personal noise exposure over a full work shift?

Accepted Answer

A noise dosimeter

Answer

A sound level meter

Answer

An octave band analyzer

Answer

An audiometer

Question 2

What is the A-weighting network on a sound level meter designed to approximate?

Accepted Answer

The frequency response of the human ear at moderate sound levels

Answer

The maximum output of industrial machinery

Answer

The resonant frequency of the audiometric test booth

Answer

The noise reduction provided by hearing protectors

Question 3

What is the hierarchy of noise controls from most to least effective?

Accepted Answer

Elimination, substitution, engineering controls, administrative controls, PPE

Answer

PPE, administrative controls, engineering controls, substitution, elimination

Answer

Engineering controls only

Answer

Administrative controls, PPE, and engineering controls equally

Question 4

During a noise survey, what is the slow response setting on a sound level meter used for?

Accepted Answer

To average fluctuations and provide a more stable reading

Answer

To detect very brief impulse noise peaks

Answer

To measure noise levels below 40 dBA

Answer

To calibrate the meter

Question 5

What is an octave band analysis used for in a hearing conservation program?

Accepted Answer

To identify frequency content of workplace noise for selecting controls and protectors

Answer

To measure the total A-weighted sound level for OSHA compliance

Answer

To calculate the standard threshold shift

Answer

To calibrate audiometers

Question 6

Before taking noise measurements, what must be done to ensure accuracy?

Accepted Answer

Calibrate using an acoustic calibrator at the beginning and end of measurements

Answer

Simply replace the batteries

Answer

Hold the meter at arm length and verify the display

Answer

Compare readings to a nearby dosimeter