Question 1

A gas turbine rotates at 60000 RPM and has fifty blades on its largest diameter. One of the sound frequencies it produces is around:

Accepted Answer

A) 50 kHz 
B) 50 Hz 
C) 5000 Hz 
D) 60 kHz 
E) 20 kHz 
A) 50 kHz 
B) 50 Hz 
C) 5000 Hz 
D) 60 kHz 
E) 20 kHz A

Question 2

What does the building services engineer do with noise?

Accepted Answer

A) Passes any problem to a specialist 
B) Ignores it 
C) Controls it to acceptable standard in occupied spaces 
D) Not select plant that generates noise 
E) Alters the use of the building to avoid any noise problem 
A) Passes any problem to a specialist 
B) Ignores it 
C) Controls it to acceptable standard in occupied spaces 
D) Not select plant that generates noise 
E) Alters the use of the building to avoid any noise problem C

Question 3

Hearing range is:

Accepted Answer

A) 20 Hz to 20 kHz 
B) 2 Hz to 20 MHz 
C) 200 Hz to 200 MHz 
D) Infinitely wide 
E) 2 kHz to 20 MHz 
A) 20 Hz to 20 kHz 
B) 2 Hz to 20 MHz 
C) 200 Hz to 200 MHz 
D) Infinitely wide 
E) 2 kHz to 20 MHz A

Question 4

Presbycusis is:

Accepted Answer

A) Hearing loss due to long term exposure to noise above 90 dBA 
B) Normal deterioration in hearing due to ageing 
C) Hearing loss due to ear disease 
D) A church presbytery committee 
E) Temporary shift in hearing ability from exposure to high industrial noise levels above 95 dBC 
A) Hearing loss due to long term exposure to noise above 90 dBA 
B) Normal deterioration in hearing due to ageing 
C) Hearing loss due to ear disease 
D) A church presbytery committee 
E) Temporary shift in hearing ability from exposure to high industrial noise levels above 95 dBC

Question 5

Reference point for sound level measurement is:

Accepted Answer

A) Lowest audible level by a domestic animal 
B) Absolute zero sound 
C) Smallest sound detectable by human ear 
D) Zero atmospheric pressure as found in space 
E) Inaudible level created in a test laboratory 
A) Lowest audible level by a domestic animal 
B) Absolute zero sound 
C) Smallest sound detectable by human ear 
D) Zero atmospheric pressure as found in space 
E) Inaudible level created in a test laboratory

Question 6

Which is the smallest increment of sound pressure level detectable by the human ear?

Accepted Answer

A) 1 W/m2 
B) 1 decibel 
C) 1 Bel 
D) 60 Bel 
E) 100 N/m2 
A) 1 W/m2 
B) 1 decibel 
C) 1 Bel 
D) 60 Bel 
E) 100 N/m2

Question 7

Explain the meaning of SWL:

Accepted Answer

A) Sound pressure level, meaning energy 
B) Selective wind loading 
C) Sound wind level 
D) Sound watts level, meaning power 
E) Sound watts loudness, meaning loudness power 
A) Sound pressure level, meaning energy 
B) Selective wind loading 
C) Sound wind level 
D) Sound watts level, meaning power 
E) Sound watts loudness, meaning loudness power

Question 8

Which item of plant does not normally create noise?

Accepted Answer

A) Air compressors 
B) Fans and pumps 
C) Refrigeration compressors 
D) Fired water heaters 
E) Piped systems 
A) Air compressors 
B) Fans and pumps 
C) Refrigeration compressors 
D) Fired water heaters 
E) Piped systems

Question 9

A noisy machine on a plant room concrete floor:

Accepted Answer

A) May direct sound more strongly in a particular direction 
B) Has no sound directivity 
C) Sends direct sound field through the floor 
D) Only creates a reverberant sound field 
E) Gains a benefit from sound energy absorbed by the floor 
A) May direct sound more strongly in a particular direction 
B) Has no sound directivity 
C) Sends direct sound field through the floor 
D) Only creates a reverberant sound field 
E) Gains a benefit from sound energy absorbed by the floor

Question 10

Sound travels through air in the form of:

Accepted Answer

A) Sinusoidal alternating frequency 
B) Straight lines 
C) Electromagnetic radiation 
D) Waves 
E) Molecular vibration 
A) Sinusoidal alternating frequency 
B) Straight lines 
C) Electromagnetic radiation 
D) Waves 
E) Molecular vibration

A gas turbine rotates at 60000 RPM and has fifty blades on its largest diameter. One of the sound frequencies it produces is around:

What does the building services engineer do with noise?

Hearing range is:

Presbycusis is:

Reference point for sound level measurement is:

Which is the smallest increment of sound pressure level detectable by the human ear?

Explain the meaning of SWL:

Which item of plant does not normally create noise?

A noisy machine on a plant room concrete floor:

Sound travels through air in the form of:

Climate Change

Post Occupancy

Built Environment

Energy Economics

Ventilation and Air Conditioning

Heat Demand

Heating

Water Services

Electrical Installations

Lighting

Condensation in Buildings

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Understanding Units

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Exam 12: Room Acoustics

A gas turbine rotates at 60000 RPM and has fifty blades on its largest diameter. One of the sound frequencies it produces is around:

What does the building services engineer do with noise?

Hearing range is:

Presbycusis is:

Reference point for sound level measurement is:

Which is the smallest increment of sound pressure level detectable by the human ear?

Explain the meaning of SWL:

Which item of plant does not normally create noise?

A noisy machine on a plant room concrete floor:

Sound travels through air in the form of:

Climate Change

Post Occupancy

Built Environment

Energy Economics

Ventilation and Air Conditioning

Heat Demand

Heating

Water Services

Electrical Installations

Lighting

Condensation in Buildings

Question Bank

Understanding Units

Filters