Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels. (A) 20 (B) 60 (C) 90 (D) 120

Maximum allowable noise exposure limits for a man working for 8
hours a day in a noisy chemical plant is about __________ decibels.
(A) 20
(B) 60
(C) 90
(D) 120
by

1 Answer

Answer :

(C) 90
by

Related questions

The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. (A) 60(B) 90 (C) 105 (D) 120

Description : The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. (A) 60 (B) 90 (C) 105 (D) 120

Last Answer : (B) 90

As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise. (A) 110 (B) 85 (C) 60 (D) 45

Description : As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise. (A) 110 (B) 85 (C) 60 (D) 45

Last Answer : (B) 85

Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels. (A) 120 (B) 140 (C) 170 (D) 200

Description : Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels. (A) 120 (B) 140 (C) 170 (D) 200

Last Answer : (C) 170

Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels. (A) 75 (B) 95 (C) 120 (D) 140

Description : Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels. (A) 75 (B) 95 (C) 120 (D) 140

Last Answer : (B) 95

Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels. (A) 90 (B) 120 (C) 150 (D) 180

Description : Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels. (A) 90 (B) 120 (C) 150 (D) 180

Last Answer : (B) 120

Noise level during normal conversation among men is about __________ decibels. (A) 10 (B) 45 (C) 90 (D) 115

Description : Noise level during normal conversation among men is about __________ decibels. (A) 10 (B) 45 (C) 90 (D) 115

Last Answer : (B) 45

Shouting by a man at his full voice corresponds to a voice level of about __________ decibels. (A) 25 (B) 50 (C) 80 (D) 120

Description : Shouting by a man at his full voice corresponds to a voice level of about __________ decibels. (A) 25 (B) 50 (C) 80 (D) 120

Last Answer : (C) 80

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. (A) 35 (B) 75 (C) 95 (D) 105

Description : Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. (A) 35 (B) 75 (C) 95 (D) 105

Last Answer : (B) 75

Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools). (A) 1-2 (B) 5-10 (C) 15-20 (D) 25-30

Description : Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools). (A) 1-2 (B) 5-10 (C) 15-20 (D) 25-30

Last Answer : (B) 5-10

For a loudness level between 110 and 120 dB, the maximum daily exposure limit is ____ minute (s). A. 1 B. 60 C. 20 D. 45

Description : For a loudness level between 110 and 120 dB, the maximum daily exposure limit is ____ minute (s). A. 1 B. 60 C. 20 D. 45

Last Answer : A. 1

Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels. (A) 85 (B) 105 (C) 125 (D) 145

Description : Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels. (A) 85 (B) 105 (C) 125 (D) 145

Last Answer : (B) 105

Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels. (A) 3 (B) 30(C) 7 (D) 70

Description : Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels. (A) 3 (B) 30 (C) 7 (D) 70

Last Answer : (A) 3

Noise level in a quiet private business office is about __________ decibels. (A) 25 (B) 50 (C) 70 (D) 85

Description : Noise level in a quiet private business office is about __________ decibels. (A) 25 (B) 50 (C) 70 (D) 85

Last Answer : (B) 50

. Noise level inside a jet airliner in normal flight is about __________ decibels. (A) 80 (B) 100 (C) 125 (D) 150

Description : . Noise level inside a jet airliner in normal flight is about __________ decibels. (A) 80 (B) 100 (C) 125 (D) 150

Last Answer : (B) 100

Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels. (A) 105 (B) 135 (C) 160 (D) 185

Description : Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels. (A) 105 (B) 135 (C) 160 (D) 185

Last Answer : (B) 135

Indicate the false statement. Noise figure is defined as A. the ratio of the S/N power supplied at the input terminal of a receiver or amplifier to the S/N power supplied to the output or load resistor B. noise factor expressed in decibels C. an unwanted form of energy tending to interfere with the proper and easy reception and reproduction of wanted signal D. S/N of an ideal system divided by S/N at the output of the receiver or amplifier under test, both working at the same temperature over the same bandwidth and fed from the same source

Description : Indicate the false statement. Noise figure is defined as A. the ratio of the S/N power supplied at the input terminal of a receiver or amplifier to the S/N power supplied to the output or ... under test, both working at the same temperature over the same bandwidth and fed from the same source

Last Answer : C. an unwanted form of energy tending to interfere with the proper and easy reception and reproduction of wanted signals

In moderate exposure , the allowable crack width at the surface of concrete should be [ A ] 0.20 mm [ B ] 0.30 mm [ C ] 0.45 mm [ D ] 0.55 mm

Description : In moderate exposure , the allowable crack width at the surface of concrete should be [ A ] 0.20 mm [ B ] 0.30 mm [ C ] 0.45 mm [ D ] 0.55 mm

Last Answer : [ A ] 0.20 mm

In India, which one of the following should be considered the right combination of the age in days and live body weight in kg for a lamb for its weaning ? (A) 20 days to 30 days and 6 kg to 7 kg (B) 45 days to 60 days and 8 kg to 10 kg (C) 105 days to 120 days and 18 kg to 21 kg (D) 75 days to 90 days and 12 kg to 15 kg (E) 55 days to 70 days and 9 kg to 11 kg

Description : In India, which one of the following should be considered the right combination of the age in days and live body weight in kg for a lamb for its weaning ? (A) 20 days to 30 days and 6 kg to 7 kg (B) 45 days to 60 ... (D) 75 days to 90 days and 12 kg to 15 kg (E) 55 days to 70 days and 9 kg to 11 kg

Last Answer : (C) 105 days to 120 days and 18 kg to 21 kg

Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million). (A) 50 (B) 1000 (C) 2000 (D) 5000

Description : Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million). (A) 50 (B) 1000 (C) 2000 (D) 5000

Last Answer : (D) 5000

Human beings can hear the sound range between: (1) 10 to 20 decibels (2) 100 to 150 decibels (3) 50 to 60 decibels (4) None of the above

Description : Human beings can hear the sound range between: (1) 10 to 20 decibels (2) 100 to 150 decibels (3) 50 to 60 decibels (4) None of the above

Last Answer : (4) None of the above Explanation: The most accepted sound range of human being is 0 to 120 decibels.

What is the intensity of sound in normal conversation? (a) 10-20 dB (b) 30-60 dB (c) 70-90 dB (d) 120-150 dB

Description : What is the intensity of sound in normal conversation? (a) 10-20 dB (b) 30-60 dB (c) 70-90 dB (d) 120-150 dB

Last Answer : b) 30-60 dB

Maximum allowable spacing of shear reinforcement for inclined stirrups with an inclination of 45° is restricted to [ A ] 0.75 d [ B ] 0.45 d [ C ] 0.90 d [ D ] d

Description : Maximum allowable spacing of shear reinforcement for inclined stirrups with an inclination of 45° is restricted to [ A ] 0.75 d [ B ] 0.45 d [ C ] 0.90 d [ D ] d

Last Answer : [ D ] d

Maximum allowable spacing of shear reinforcement for vertical stirrups is restricted to [ A ] d [ B ] 0.45 d [ C ] 0.75 d [ D ] 0.90 d

Description : Maximum allowable spacing of shear reinforcement for vertical stirrups is restricted to [ A ] d [ B ] 0.45 d [ C ] 0.75 d [ D ] 0.90 d

Last Answer : [ C ] 0.75 d

In “Severe exposure” the allowable crack width at the surface of concrete should not exceed [ A ] 0.1 mm [ B ] 0.2 mm [ C ] 0.3 mm [ D ] 0.4 mm

Description : In “Severe exposure” the allowable crack width at the surface of concrete should not exceed [ A ] 0.1 mm [ B ] 0.2 mm [ C ] 0.3 mm [ D ] 0.4 mm

Last Answer : [ A ] 0.1 mm

High noise levels produced during operation of fans and compressors can be reduced by using (A) Mufflers (silencers) (B) Acoustic absorbent (C) Lagging of noisy duct (D) None of these

Description : High noise levels produced during operation of fans and compressors can be reduced by using (A) Mufflers (silencers) (B) Acoustic absorbent (C) Lagging of noisy duct (D) None of these

Last Answer : (A) Mufflers (silencers)

What bandwidth is needed to support a capacity of 128 kbps when the signal power to noise power ratio in decibels is 100? A. 19224 Hz B. 3853 Hz C. 19244 Hz D. 3583 Hz

Description : What bandwidth is needed to support a capacity of 128 kbps when the signal power to noise power ratio in decibels is 100? A. 19224 Hz B. 3853 Hz C. 19244 Hz D. 3583 Hz

Last Answer : B. 3853 Hz

Noise Pollution is measured in a) Hertz b) Fathoms c) Manometers d) Decibels.

Description : Noise Pollution is measured in a) Hertz b) Fathoms c) Manometers d) Decibels. 

Last Answer : d) Decibels.

In a single threaded worm and worm wheel the number of teeth on the worm wheel is 60. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.90 b.120 c.60 d.45 e.107 dynes

Description : In a single threaded worm and worm wheel the number of teeth on the worm wheel is 60. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.90 b.120 c.60 d.45 e.107 dynes

Last Answer : a. 90

In a single threaded worm and worm wheel the number of teeth on the worm wheel is 80. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.60 b.45 c.120 d.107 dynes e.90

Description : In a single threaded worm and worm wheel the number of teeth on the worm wheel is 80. The diameter of the effort wheel is 12 cm and that of load drum is 8 cm. The velocity ratio will be a.60 b.45 c.120 d.107 dynes e.90

Last Answer : c. 120

The ratio of working capital to total capital investment for most chemical plants (except for non-seasonal based products) is in the range of __________ percent. (A) 0.1 to 1 (B) 1 to 2 (C) 10 to 20 (D) 50 to 60

Description : The ratio of working capital to total capital investment for most chemical plants (except for non-seasonal based products) is in the range of __________ percent. (A) 0.1 to 1 (B) 1 to 2 (C) 10 to 20 (D) 50 to 60

Last Answer : (C) 10 to 20

A circular pipe is subjected to maximum shear force of 60 kN. What is the diameter of the pipe if maximum allowable shear stress is 5 Mpa? a. 27.311 mm b. 75.56 mm c. 142.72 mm d. 692.10 mm

Description : A circular pipe is subjected to maximum shear force of 60 kN. What is the diameter of the pipe if maximum allowable shear stress is 5 Mpa? a. 27.311 mm b. 75.56 mm c. 142.72 mm d. 692.10 mm

Last Answer : c. 142.72 mm

If your backyard is noisy because of a busy road a quarter mile away is there anything one can do to quiet the noise?

Description : If your backyard is noisy because of a busy road a quarter mile away is there anything one can do to quiet the noise?

Last Answer : answer:Egg crate foam. It's good enough for soundproof rooms, so why not? Hell, I know someone who, on a tight budget yet in need of a way to muffle their music space, just put up a whole ... though. You need something to scatter/diffuse it, and that irregular egg crate shape is great for that.

Smoke point of a good burning kerosene may be around __________ mm. (A) 0-5 (B) 20-25 (C) 60-75 (D) 100-120

Description : Smoke point of a good burning kerosene may be around __________ mm. (A) 0-5 (B) 20-25 (C) 60-75 (D) 100-120

Last Answer : (B) 20-25

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C. (A) 20 (B) 60 (C) 120 (D) ∞

Description : In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C. (A) 20 (B) 60 (C) 120 (D) ∞

Last Answer : (D) ∞

Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO2 in air is __________ ppm. (A) 5 (B) 500 (C) 1000 (D) 2000

Description : Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO2 in air is __________ ppm. (A) 5 (B) 500 (C) 1000 (D) 2000

Last Answer : (A) 5

P and Q can do a piece of job in 24 days; Q and R can do it in 30 days while R and P can finish it in 40 days. If P, Q, Rworks together, in how many days will they finish the job? In how many days will each one of them finish it, working alone? A) 15,25,35,45 B) 20,30,40,120 C) 20,30,40,50 D) 20,25,30,60

Description : P and Q can do a piece of job in 24 days; Q and R can do it in 30 days while R and P can finish it in 40 days. If P, Q, Rworks together, in how many days will they finish the job? In how many days will each ... finish it, working alone? A) 15,25,35,45 B) 20,30,40,120 C) 20,30,40,50 D) 20,25,30,60 

Last Answer : B Time taken by (P + Q) to finish the job = 24days. (P + Q)'s 1 day's job = 1/24 Time taken by (Q +R) to finish the job = 30days. (Q + R)'s 1 day's job = 1/30 Time taken by (R + P) to finish the ... - {(P + Q)'s 1 day's job } = (1/20 -1/24)=1/120 Hence, R alone can finish the job in 120 days.

After how many days of absence from Parliament without permission can a M.P. be disqualified? (1) 30 days (2) 60 days (3) 90 days (4) 120 days

Description : After how many days of absence from Parliament without permission can a M.P. be disqualified? (1) 30 days (2) 60 days (3) 90 days (4) 120 days

Last Answer : (2) 60 days Explanation: The Constitution provides for disqualification of a Member of Parliament (MP) if he/she is absent continuously for 60 days from the Lok Sabha or the Rajya Sabha without permission.

After how many days of absence from Parliament without permission can a M.P. be disqualified? (1) 30 days (2) 60 days (3) 90 days (4) 120 days

Description : After how many days of absence from Parliament without permission can a M.P. be disqualified? (1) 30 days (2) 60 days (3) 90 days (4) 120 days

Last Answer : (2) 60 days Explanation: The Constitution provides for disqualification of a Member of Parliament (MP) if he/she is absent continuously for 60 days from the Lok Sabha or the Rajya Sabha without permission. Hence MPs submit leave applications when they are absent for a longer period of time.

The distance between node and adjacent antinodes is 30 cm. The wavelength is - (1) 30 cm. (2) 90 cm. (3) 120 cm. (4) 60 cm.

Description : The distance between node and adjacent antinodes is 30 cm. The wavelength is - (1) 30 cm. (2) 90 cm. (3) 120 cm. (4) 60 cm.

Last Answer : (4) 60 cm. Explanation: A node is a point along a standing wave where the wave has minimal amplitude. The opposite of a node is an anti-node, a point where the amplitude of the standing wave is a maximum.

What will be the frequency of a three-phase, six pole, AC generator operating at 1800 revolutions per minute? A. 60 hertz B. 90 hertz C. 120 hertz D. 180 hertz

Description : What will be the frequency of a three-phase, six pole, AC generator operating at 1800 revolutions per minute? A. 60 hertz B. 90 hertz C. 120 hertz D. 180 hertz

Last Answer : Answer: B

Assuming a standard 60 Hz. input to the circuit shown in the illustration, the ripple frequency would be ____________. EL-0085 A. 30 Hz B. 60 Hz C. 90 Hz D. 120 Hz

Description : Assuming a standard 60 Hz. input to the circuit shown in the illustration, the ripple frequency would be ____________. EL-0085 A. 30 Hz B. 60 Hz C. 90 Hz D. 120 Hz

Last Answer : Answer: D

The APO shall submit its nominations with complete documentation to the Commission not later than ______ prior to the expiry of the term of an incumbent chairman or member. a. 30 days b. 60 days c. 90 days d. 120 days

Description : The APO shall submit its nominations with complete documentation to the Commission not later than ______ prior to the expiry of the term of an incumbent chairman or member. a. 30 days b. 60 days c. 90 days d. 120 days

Last Answer : 60 days

The intrinsic angle of the wave with a loss angle of 60 is a) 120 b) 60 c) 90 d) 30

Description : The intrinsic angle of the wave with a loss angle of 60 is a) 120 b) 60 c) 90 d) 30

Last Answer : d) 30

At 160°C, it takes about minutes to kilt bacterial spores in a hot-air oven. a. 30 b. 60 c. 90 d. 120

Description : At 160°C, it takes about minutes to kilt bacterial spores in a hot-air oven. a. 30 b. 60 c. 90 d. 120

Last Answer : d. 120

The initial setting time of hydraulic lime, is (A) 30 minutes (B) 60 minutes (C) 90 minutes (D) 120 minutes

Description : The initial setting time of hydraulic lime, is (A) 30 minutes (B) 60 minutes (C) 90 minutes (D) 120 minutes

Last Answer : Answer: Option D

The initial setting time of lime-pozzolana, is (A) 30 minutes (B) 60 minutes (C) 90 minutes (D) 120 minutes

Description : The initial setting time of lime-pozzolana, is (A) 30 minutes (B) 60 minutes (C) 90 minutes (D) 120 minutes

Last Answer : Answer: Option D

Out of 5 women and 4 men, a committee of three members is to be formed in such a way that at least one member is woman. In how many different ways can this be done? 1) 60 2) 100 3) 120 4) 90 5) 80

Description : Out of 5 women and 4 men, a committee of three members is to be formed in such a way that at least one member is woman. In how many different ways can this be done? 1) 60 2) 100 3) 120 4) 90 5) 80

Last Answer : 5) 80

Revenue from services with duration of not more than……….. days to be recognized when rendering of services under contract is completed or substantially complted. a) 60 days b) 90 days c) 120 days d) 180 days

Description : Revenue from services with duration of not more than……….. days to be recognized when rendering of services under contract is completed or substantially complted. a) 60 days b) 90 days c) 120 days d) 180 days

Last Answer : b) 90 days

the time taken to plough one acre farm with 35 hp tractor is : A)60 minutes b)75 minutes C)90 minutes d)120 minutes

Description : the time taken to plough one acre farm with 35 hp tractor is : A)60 minutes b)75 minutes C)90 minutes d)120 minutes

Last Answer : b)75 minutes

A suspected case of poisoning has been brought to the casualty with weakness, fainting, involuntary passage of urine and stools, profuse sweating, salivation, watering from nose and eyes. His pulse is 120/min, low volume, BP 90/60 mm Hg, respiration shallow, pupil constricted, muscles flabby with occasional fasciculations. Which is the most likely type of poisoning: A. Belladonna B. Barbiturate C. Anticholinesterase D. Dicophane (DDT

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Last Answer : C. Anticholinesterase