Description : TLV of ozone (O3 ) and phosgene (COCl2 ) in air is __________ ppm. (A) 0.1 (B) 25 (C) 100 (D) 1000
Last Answer : (A) 0.1
Description : TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes (A) Skin disorder (B) Bronchitis (C) Bone disease (D) Cancer
Last Answer : (B) Bronchitis
Description : TLV of mercury in potable (drinking) water is about __________ ppm. (A) 0.001 (B) 0.1 (C) 1 (D) 5
Last Answer : (A) 0.001
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
Description : A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm. (A) 1000 to 2000 (B) 3000 to 6000 (C) 6000 to 9000 (D) 10000 to 100000
Last Answer : (D) 10000 to 100000
Description : Methyl isocyanate (MIC) gas (TLV
Last Answer : (D) Very extremely
Description : Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm). (A) Highly (B) Moderately (C) Extremely (D) Very extremely
Last Answer : (B) Moderately
Description : TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm. (A) 5 (B) 100 (C) 1000 (D) 2000
Description : Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million). (A) 0.002 (B) 0.2 (C) 1.2 (D) 4.8
Last Answer : (B) 0.2
Description : Out of the following, TLV of __________ is maximum (about 500 ppm). (A) Carbon dioxide (B) Toluene (C) Carbon disulphide (D) Acetaldehyde
Last Answer : (A) Carbon dioxide
Description : Threshold limit value (TLV) of CO in air is __________ ppm. (A) 5 (B) 50 (C) 2000 (D) 5000
Last Answer : (B) 50
Description : Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm. (A) < 1 (B) 10-100 (C) 100-200 (D) 100-1000
Last Answer : (A) < 1
Description : Out of the following, TLV of __________ is the minimum (about 0.02 ppm). (A) Phosgene (B) Bromine (C) MIC (Methyl isocyanate) (D) Ozone
Last Answer : (C) MIC (Methyl isocyanate)
Description : Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) (A) Acts as a green house gas thereby raising earth's ... (B) Causes asphyxia (C) Causes increase in sea level (D) Enhances the green house effect
Last Answer : (B) Causes asphyxia
Description : Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the (A) Industrial chimney exhaust (B) Automobiles exhaust (C) Photochemical reaction in polluted atmosphere (D) Burning of domestic fuel
Last Answer : (B) Automobiles exhaust
Description : The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C. (A) 100 to 150 (B) 350 to 450 (C) 550 to 650 (D) 700 to 850
Last Answer : (B) 350 to 450
Description : Temperature attained in soldering of metals is about __________ °C. (A) 150-300 (B) 400-500 (C) 650-800 (D) 1000-1100
Last Answer : (A) 150-300
Description : TLV of aldrin in public water supply system is about __________ μg/litre. (A) 0.5 (B) 17 (C) 357 (D) 1097
Last Answer : (B) 17
Description : Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre. (A) 22 (B) 42 (C) 332 (D) 1050
Last Answer : (B) 42
Description : The chloride content of treated water for public supplies should not exceed (A) 100 ppm (B) 150 ppm (C) 200 ppm (D) 250 ppm
Last Answer : (D) 250 ppm
Description : Inter-distance between ventilation columns in a sewer line is kept A. 25 to 50 m B. 50 m to 100 m C. 100 m to 150 m D. 150 m to 300 m
Last Answer : ANS: D
Description : Typical waste gases temperature from glass melting furnace a) 1000-1550 oC b) 800-950 oC c) 650–750 oC d) 760-815 oC
Last Answer : 1000-1550 oC
Description : Tolerable limit of nitrogen oxides in air is __________ ppm. (A) 0.1 (B) 1 (C) 5 (D) 25
Last Answer : (C) 5
Description : As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3 .(μg-microgram) (A) 10 (B) 90 (C) 800 (D) 750
Last Answer : (B) 90
Description : If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is A. 50 ppm B. 100 ppm C. 150 ppm D. 200 ppm
Description : 37. Euro –II norm stipulate ‘sulphur’ level in diesel and petrol to be ... e) 400 ppm in diesel and 150 ppm in petrol. f) 350 ppm in diesel and 180 ppm in petrol. g) 100 ppm in diesel and 50 ppm in petrol. h) 350 ppm in diesel and 150 ppm in petrol.
Last Answer : h) 350 ppm in diesel and 150 ppm in petrol.
Description : 17. Euro –II norm stipulate ‘sulphur’ level in diesel and petrol to be ... a) 400 ppm in diesel and 150 ppm in petrol. b) 350 ppm in diesel and 180 ppm in petrol. c) 100 ppm in diesel and 50 ppm in petrol. d) 350 ppm in diesel and 150 ppm in petrol.
Last Answer : d) 350 ppm in diesel and 150 ppm in petrol.
Description : Carbon dioxide is an important greenhouse gas. What is the current rate in parts per million per year of atmospheric increase of this gas? w) 0.15 ppm per year (parts per million) x) 1.5 ppm per year y) 15 ppm per year z) 150 ppm per year
Last Answer : ANSWER: X -- 1.5 PPM PER YEAR
Description : Ventilating shafts are provided to a sewer line at every A. 100 m B. 150 m C. 200 m D. 300 m
Description : Sewer ventilating columns are generally placed at A. Distances 150 m to 300 m B. Upper ends of branch sewers C. Every change in the size of sewers D. All the above
Description : If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these
Last Answer : ANS: B
Description : The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended (A) 100 mm (B) 150 mm (C) 200 mm (D) 175 mm
Last Answer : (B) 150 mm
Description : Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C. (A) 250 (B) 650 (C) 850 (D) 1000
Last Answer : (B) 650
Description : 650 divided by 25?
Last Answer : 26
Description : Which of the following agents and dosage regimens is the best choice of treatment for an asthma patient with rheumatoid arthritis who is considered sensitive to aspirin (experiences bronchospasm with use)? ... once a week (d) Azathioprine, 75 mg daily (e) Cyclophosphamide, 100 mg daily
Last Answer : Ans: C
Description : The compound interest accrued on an amount of Rs. 25,500 at the end of three years is Rs. 8,440.5.What would be the simple interest accrued on the same amount at the same rate in the same period? a) Rs. 5,450/- b) Rs. 8,750/- c) Rs. 4,350/- d) Rs. 3,650/- e) Rs. 7,650/-
Last Answer : A = P + Interest = 25500 + 8440.5 = 33940.5 A = P + 1 + (R/100)^3 33940.5 = 25500 a + R/100)^3 a + R/100)^3 = 33940.5 / 25500 a + R/100)^3 = 1.331 a + R/100)^3 = ... R = 10% Simple Interest = Principle Rate Time / 100 = 25500 10 3/100 = 7650 Answer: e)
Description : 25 buses are running between two places P and Q. In how many ways can a person go from P to Q and return by a different bus? a) 300 b) 625 c) 600 d) 650
Last Answer : c) 600
Description : Maximum permissible turbidity in potable water is __________ ppm. (A) 1 (B) 10 (C) 250 (D) 1000
Last Answer : (B) 10
Description : Dissolved oxygen content in river water is around __________ ppm. (A) 5 (B) 100 (C) 250 (D) 500
Description : For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm. (A) 10000 (B) 5 (C) 500 (D) 1000
Last Answer : (B) 5
Description : The permissible color for domestic water supply is __________ ppm. (A) 1 (B) 20 (C) 100 (D) 1000
Last Answer : (B) 20
Description : Bromine content in sea water may be around __________ ppm. (A) 70 (B) 640 (C) 1875 (D) 2500
Last Answer : (A) 70
Description : Sea water contains about __________ ppm of bromine. (A) 5 (B) 70 (C) 500 (D) 1700
Last Answer : (B) 70
Description : If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen
Last Answer : ANS: A
Description : Lead acetate test in sewer manhole is done to test the presence of A. Methane gas B. Hydrogen sulphide C. Carbondioxide gas D. Diesel vapours
Description : The sewer which resists sulphide corrosion, is A. Brick sewer B. Cast iron sewer C. R.C.C. sewer D. Lead sewer
Description : B.O.D. of treated water should be (A) 10 ppm (B) 25 ppm (C) 20 ppm (D) Nil
Last Answer : (D) Nil
Description : Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm. (A) 1 (B) 50 (C) 5000 (D) 10000
Description : Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ ppm. (A) 50 (B) 1000 (C) 5000 (D) 10000
Last Answer : (A) 50
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