1. . Unit of measurement of noise is
(A) dB
(B) m/sec
(C) m/Sec²
(D) Newton
2. . Physical effect of noise are
(A) Headache
(B) Hearing Impaired
(C) Loss of memory
(D) Depression
3. . The generally accepted standard range of available frequency is
(A) 0 — 1000 Hz
(B) 5 — 2000 Hz
(C) 30 — 40,000 Hz
(D) 20 — 20,000 Hz
4. . Term often used to refer an unwanted sound to disturb the peoples
(A) Thermal conductivity
(B) Chirping of a sparrow
(C) Noise
(D) Temperature
5. . It is logarithmic measure of the effective sound pressure of a sound relative to a reference value
(A) Sound Intensity
(B) Audio frequency
(C) Sound pressure level
(D) Waveform
6. . The combined effect and scattering absorption of sound is called
(A) Noise
(B) Sound pressure level
(C) Absolute threshold of hearing
(D) Attenuation
7. . Reduction of sound energy transmitted into an adjoining air space
(A) Sound absorption
(B) Sound Insulation
(C) Sound Reduction Index
(D) Transmission coefficient
8. . Reducing the sound pressure with respect to a specific sound source and receptor
(A) Sound proofing
(B) Damping
(C) Absorption
(D) Impact Sound
9. . It is to reduce resonance or redirection (reflection or diffusion)
(A) Transmission coefficient
(B) Damping
(C) Sound insulation
(D) Sound reduction Index
10. . In one method of isolating sound and stopping it from transmitting to the outside world where it may be undesirable
(A) Room within a room
(B) Diffusion
(C) Noise cancellation
(D) Reflection
11. . Fact is to decrease or eliminate the exterior noise
(A) Sound absorption
(B) Air born sound
(C) Impact sound
(D) Sound proofing
12. . Process of reflection and absorption of sound wave in an enclosure
(A) Sound pressure level
(B) Absorption of sound
(C) Reverberation
(D) None of the a,b,c
13. . Is used to measure the noise
(A) Lux meter
(B) Monometer
(C) Dosimeter
(D) Spectrometer
14. . Used as a noise control personal protective instrument
(A) Safety goggles
(B) Ear muff
(C) Safety gloves
(D) Safety helmets
15. . Industrial noise may cause to an employee
(A) Infection
(B) Accident
(C) Vision loss
(D) Hearing loss