This set of Environment Management Assessment Questions and Answers focuses on “Noise Pollution Control Techniques”.
1. How many fundamental ways in which noise can b controlled?
Explanation: There are four fundamental ways in which noise can be controlled. a) Reduce noise at the source. b) Block the path of noise. c) Increase the path length. d) Protect the recipient. These four noise controlling ways reduce the noise pollution.
2. Which is the best way to control noise pollution among the four fundamental ways?
a) Reduce noise at the source
b) Block the path of noise
c) Increase the path length
d) Protect the recipient
Explanation: The best control method for noise pollution is to reduce the noise levels at the source. We a noise is reduced at the source tan pollution won’t occurrence in the proceeding steps and thus it won’t affect any organisms.
3. How can we reduce the noise in industries?
a) By not using the heavy machinery
b) By using rigid sealed enclosures
c) By using more robotics
d) By reduce the production of the industries
Explanation: In industries, noise reduction can be done by using rigid sealed enclosures around machinery, lined with acoustic absorbing material. Isolated machines and their enclosures from the floor can reduce the noise pollution at the source.
4. What is the main source of vehicular noise?
a) High speed
b) Movement of the vehicle’s tyres on the pavement
c) Low pressure
d) Fuel engine
Explanation: Most of the vehicular noise comes from the movement of the vehicle’s tyres on the pavement and wind resistance. Poorly maintained vehicles can also increase the noise pollution in the vehicles.
5. Which of the following is a way to reduce the traffic noise in the highway?
a) Constructing the vertical barriers
b) Increase the speed of the vehicles
c) Using old engine vehicles
d) Horning in unnecessary time
Explanation: The path of traffic noise can be locked by constructing vertical barriers along the highways. Proper highway planning and design are essential for controlling traffic noise. Establishing lower speed limits for highways also reduced the noise.
6. Noise levels at construction sites can be controlled using proper construction planning and scheduling techniques.
Explanation: Noise levels at construction sites can be controlled using proper construction planning and scheduling techniques. Certain techniques should be used in order to reduce the noise generated by machineries. Avoid construction timings during the night in order to disturbed the surrounding places.
7. What is the best way to reduce the noise pollution around houses?
a) Throwing all noisy machines
b) Built a noise resistant shield across the house
c) Use of ear buds to reduce the noise
d) Planting trees around houses
Explanation: To block the path of noise, planting trees around houses can be an effective way. In some situations trees will reduce noise levels up to 50% but to be effective we need a trees barrier that is at least 50 feet deep.
8. In order to reduce the roadside noise which of the following product Australian Government designed?
a) Sound tube
b) Ear buds
c) Ear repellent
d) Noise repellent
Explanation: In Melbourne, Australia a special instrument called as a sound tube is designed. This sound tube reduced the roadway noise without detracting from the area’s aesthetics and thus it lowers the noise pollution.
9. What is the best way to reduce aircraft noise?
a) By using shield around aircraft
b) By using quieter jet engines
c) By using heavy propellants
d) By using white paint
Explanation: Aircraft noise can be reduced significantly by using quieter jet engines. The old engines which cause more noise should be replaced by the new engines which cause less noise. Altering paths and time of day runway is also reduced the noise pollution.
10. What is used during sleep in order to avoid noise pollution?
c) Cotton shirts
Explanation: Earplugs reduced the noise pollution which can help humans to sleep peacefully. Earplugs are a cheap drugstore purchase that makes humans sleep by barring the noise. Noise canceling headphones are also used while sleeping to reduce noise.
11. How does a car in good condition can cause less pollution?
a) It goes in high speed
b) It requires less fuel
c) It gives safety
d) It avoids muffler chugging down the streets
Explanation: The sound of a car without a muffler chugging down the street reduces the noise pollution. Keeping car in good and quiet working order reduces the amount of noise it generates and thus it gives a great impact on noise.
12. Which of the following way reduce noise pollution?
a) Turn on the loud devices
b) Turn on white noise
c) Using old engines vehicles
d) Bursting crackers
Explanation: Turning on white noise can reduce the harsh noise. Turn on white noise is a counterintuitive, adding more pleasant noise on top of other noise. For example, the drone of a fan can be a pleasant white noise if you have a quality fan.
13. Which of the following steps can take by government in order to reduce the noise pollution?
a) Enforcement of all noise laws
b) Constructing more roads
c) Increasing the number of vehicles
d) Not to create awareness about the noise pollution
Explanation: Enforcement of all noise laws is variable and often subjective. Even where laws exist, municipalities may not have sufficient noise enforcement personnel who are well trained and also a person who is an ability to monitor noise compliance.
14. Drown out of noise with pleasant sounds can reduce noise pollution.
Explanation: Drown out the noise with pleasant sounds are a natural choice that serves the purpose to eliminate unpleasant noise while filling the space where sounds that give pleasure. Pleasant music, sounds of ocean, etc are few examples.
Sanfoundry Global Education & Learning Series – Energy & Environment Management.
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