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
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
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
Description : 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
Last Answer : (C) 90
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
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
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
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
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
Description : Noise level in a quiet private business office is about __________ decibels. (A) 25 (B) 50 (C) 70 (D) 85
Last Answer : (B) 50
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
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
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
Description : At what height must top rails be fitted above working platform? a. Between 90 cm (35 inches) and 110 cm (43 inches) b. Between 100 cm (39 inches) and 120 cm (47 inches) c. Between 95 cm (38 inches) and 115 cm ( 45 inches) d. Between 105 cm (41 inches)and 125 cm (49 inches)
Last Answer : c. Between 95 cm (38 inches) and 115 cm ( 45 inches)
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
Description : The standard audible capacity of a healthy human being as per World Health Organi-sation is in the range of - (1) 45-50 decibels (2) 200-250 decibels (3) 5-10 decibels (4) 2000-2500 decibels
Last Answer : (3) 5-10 decibels Explanation: Hearing range usually describes the range of frequencies that can be heard by an animal or human, though it can also refer to the range of levels. In humans the audible ... as low as 12 Hz under ideal laboratory conditions, to 20 kHz in most children and some adults.
Description : The standard audible capacity of a healthy human being as per World Health Organi-sation is in the range of (1) 45-50 decibels (2) 200-250 decibels (3) 5-10 decibels (4) 2000-2500 decibels
Last Answer : 5-10 decibels
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
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
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
Description : Noise Pollution is measured in a) Hertz b) Fathoms c) Manometers d) Decibels.
Last Answer : d) Decibels.
Description : Min. breaking load of 60kg weld during transverse breaking load test is? (i) 110 MT (ii) 115 MT* (iii) 90 MT (iv) 120 MT
Last Answer : (ii) 115 MT*
Description : When a voltage of 115 VDC is applied to the illustrated circuit with a resistance of 10,230 ohms the current will be _______ EL-0018 A. 88.95 milliamps B. 103.45 milliamps C. 11.24 milliamps D. 0.91 amps
Last Answer : Answer: C
Description : What is the reference noise level? A. 10 pW B. 0 dBm C. 1mW D. -90 dBm
Last Answer : D. -90 dBm
Description : What is the median of 112 135 124 115 119 90 112 134 113 114 115.?
Last Answer : The median is 115.
Description : The number of amino acid residues in PTH: (A) 51 (B) 84 (C) 90 (D) 115
Last Answer : Answer : B
Description : According to 1998 census the density of population per Sq. Km in FATA is: A. 115 Persons per Sq. Km 90 B. 170 Persons per Sq. Km C. 187 Persons per Sq. Km D. 201 Persons per Sq. Km
Last Answer : ANSWER: A
Description : When a voltage of 115 VDC is applied to the illustrated circuit with a resistance of 32 ohms the current will be _______. EL-0018 A. 278.26 amps B. 147.00 amps C. 8.90 amps D. 3.59 amps
Last Answer : Answer: D
Description : The Average of marks obtained by 120 candidates in a certain examination is 35. If the average marks of passed candidates is 39 and that of failed candidates is 15, what is the number of candidates who passed the examination? A.90 B.100 C.108 D.115 E.None of these
Last Answer : Answer – B (100) Explanation – Let the number of passed candidates be a Then total marks =>120 x 35 = 39 a + (120 – a) x 15 4200 = 39 a + 1800 – 15 a a = 100
Description : Permissible noise level at Residential area during night time is : (1) 45 dB (2) 55 dB (3) 75 dB (4) 80 dB
Last Answer : (1) 45 dB Explanation: As per the norm, the permissible noise level in residential areas is 45 db during night time, 55 db during day and in commercial areas it is 55 db during night and 65 db during day.
Description : Permissible noise level at Residential area during night time is : (1) 45 dB (A) (2) 55 dB (A) (3) 75 dB (A) (4) 80 dB (A)
Last Answer : 45 dB (A)
Description : Acceptable "Noise Pollution Level" in India range between: (1) 16 - 35 db (2) 40 - 45 db (3) 70 - 100 db (4) 10 - 15 db
Last Answer : (2) 40 - 45 db Explanation: According to the noise pollution rules, the permissible noise level during the day is 50dB in silence zones, 55dB in residential areas, 65 dB in commercial areas and 75 ... areas, commercial areas and industrial areas are respectively 40 dB, 45 dB, 55 dB and 70 dB.
Description : Acceptable “Noise Pollution Level” in India range between: (1) 16 – 35 dec (2) 40 – 45 dec (3) 70 – 100 dec (4) 10 – 15 dec
Last Answer : 40 – 45 dec
Description : What is the reference level for noise measurement, F1A weighted? A. -90 dBm B. -82 dBm C. -67 dBm D. -85 dBm
Last Answer : D. -85 dBm
Description : Which of the following is true about the Accounts Receivable Lag and its implications on demand? a. If you offer no credit, demand falls to about 60% of normal. b. At 30 days, demand is 90%. c. At 45 days, demand is 95%. d. At 60 days, demand is 98.5%. e. At 90 days, demand is 100%.
Last Answer : d. At 60 days, demand is 98.5%.
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.
Description : If a quiet whisper is 10 decibels, then what is the average pain threshold in decibels for humans?
Last Answer : ANSWER: 120 DECIBELS (ACCEPT 110 TO 130)
Description : The electrical energy necessary to power a sound-powered telephone's small vibrating bell is obtained from _________. A. the emergency batteries for the general alarm B. each station's hand-cranked generator C. the emergency switchboard D. normal 115 volt DC supplies
Last Answer : Answer: B
Description : The average domestic consumption under normal conditions in an Indian city per day per person, is (A) 105 litres (B) 115 litres (C) 125 litres (D) 135 litres
Last Answer : (D) 135 litres
Description : What is the normal blood sugar level of a human being? (1) Close to 10 mg/ml (2) 120 - 150 mg/dl (3) 80 - 90 mg/dl (4) 150 — 200 mg/dl
Last Answer : (2) 120 - 150 mg/dl Explanation: The blood sugar concentration or blood glucose level is the amount of glucose (sugar) present in the blood of a human or animal. The body naturally tightly regulates blood ... (termed "the fasting level"), and rise after meals for an hour or two by a few millimolar.
Description : What is the normal blood sugar level of a human being? (1) Close to 10 mg/ml (2) 120 – 150 mg/dl (3) 80 – 90 mg/dl (4) 150 – 200 mg/dl
Last Answer : 120 – 150 mg/dl
Description : What is the intensity of sound during normal conversation?
Last Answer : What is the intensity of sound during normal conversation? A. 10-20 db B. 30-60 db C. 70-90 db D. 120-150 db
Description : is a blood sugar level of 115 considered high?
Last Answer : is 115 very high What is the average for blood sugar in a 80 yr old man “is a blood sugar level of 115 considered high?†is a blood sugar level of 115 considered high In my opinion a glucose ... 84 or lower I become very weak and nauseated..so I feel better when my blood sugar is around 115
Description : Given three resistances of `30 Omega` each. How can they be connected to given a total resistance of (i) `90 Omega (ii) 10 Omega (iii) 45 Omega` ?
Last Answer : Given three resistances of `30 Omega` each. How can they be connected to given a total resistance of (i) `90 Omega (ii) 10 Omega (iii) 45 Omega` ?
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
Description : Sub soilders are operated at maximum depth of (a) 30-40 cm (b) 45-75 cm (c) 75-90 cm (d) 10-20 cm
Last Answer : (b) 45-75 cm
Description : High strength of concrete requires a water cement ratio of [ A ] 0.10 to 0.15 [ B ] 0.25 to 0.30 [ C ] 0.45 to 0.60 [ D ] 0.75 to 0.90
Last Answer : [ B ] 0.25 to 0.30
Description : How loud is 93 decibels?
Last Answer : answer:Here’s a comparison chart. http://www.controlnoise.com/decibel-chart/ At 90 and above the chart says “sustained exposure may cause hearing loss.” (I goggled this. it was easy to find.)
Description : How many decibels can the human ear bear?
Last Answer : The noise around us usually ranges from 20 / whispering / to 120 / aircraft start / decibels. It can be a little different for each individual. For sound above 120, the sound may start to hurt.
Description : What are decibels a measure of?
Last Answer : Decibel is a measure of the ratio of the strength of twosignals, or two sound levels. It may also refers to the loudness ofONE sound, or the strength of ONE signal, with respect to astandard reference level.It is a logarithmic measure.