Description : The maximum permissible nitrites in public water supplies, is (A) Nil (B) 0.5 P.P.M. (C) 1.0. P.P.M. (D) 1.5 P.P.M
Last Answer : (A) Ni
Description : Maximum permissible turbidity in potable water is __________ ppm. (A) 1 (B) 10 (C) 250 (D) 1000
Last Answer : (B) 10
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 : The maximum permissible colour for domestic supplies based on cobalt scale, is (A) 5 ppm (B) 10 ppm (C) 15 ppm (D) 20 ppm
Last Answer : (D) 20 ppm
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 : The nitrate concentration in domestic water supplies, is generally limited to (A) 10 ppm (B) 15 ppm (C) 30 ppm (D) 45 ppm
Last Answer : (D) 45 ppm
Description : Pick out the wrong statement. (A) Biological oxygen demand (BOD) is a characteristic and not a constituent of water (B) BOD is a measure of the amount of oxygen which will be demanded & used in 5 days ... BOD is expressed in mg/litre (typically, BOD=2.5 mg/litre for potable water) (D) None of these
Last Answer : (D) None of these
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 : In case of foundations on sandy soil, maximum permissible differential settlement, is usually limited to (A) 15 mm (B) 25 mm (C) 35 mm (D) 45 mm
Last Answer : Answer: Option B
Description : Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be (A) Nil (B) 5 (C) 10 (D) 15
Last Answer : (A) Nil
Description : A rural water supply serves a population of 10, 000 at the rate of 50 litres per capita per day . For the chlorine dose of 2 PPM the required amount of bleaching powder with 20% available chlorine will be a. 0.5 kg b. 5 kg * c. 10 kg d. 15 kg
Last Answer : b. 5 kg
Description : The permissible color for domestic water supply is __________ ppm. (A) 1 (B) 20 (C) 100 (D) 1000
Last Answer : (B) 20
Description : The permissible and normal limit of EC, RSC, SAR (meq 1 –1 ) and Boron content (ppm)
Last Answer : Ans.2–4, < 2.5, < 10 and 10,000 ha
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 : 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 : 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 : From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm. (A) 5 (B) 50 (C) 500 (D) 5000
Last Answer : (A) 5
Description : A hydrometer is used to measure the ____________. A. specific gravity of a battery electrolyte B. water pressure in a deck pipeline C. amount of potable water a vessel is taking on D. power developed by a salt water service pump
Last Answer : Answer: A
Description : Pick out the correct statement. (A) Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water (B) COD is determined by oxidising the organic matter present in water with potassium dichromate ... of potable water may be 1-2 mg/litre (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be (A) 0.35 d (B) 0.40 d (C) 0.45 d (D) Dependent on grade of concrete also
Description : Points & Crossing is laid at a cant of a. 1 in 20 b. 1 in 10 c. 1 in 15 d. NIL*
Last Answer : d. NIL*
Description : Check valves are installed (A) On the delivery side of the pumping set (B) At the interconnections between polluted water system and a potable water system (C) Both (a) and (b) (D) Neither (a) nor (b)
Last Answer : (C) Both (a) and (b)
Description : The prescribed hardness limit of potable water ranges between (A) 50 to 75 P.P.M. (B) 75 to 115 P.P.M. (C) 100 to 150 P.P.M. (D) 150 to 200 P.P.M.
Last Answer : (B) 75 to 115 P.P.M.
Description : Water used for mixing concrete should be [ A ] Slightly acidic [ B ] Free from bacteria [ C ] Distilled [ D ] Potable
Last Answer : [ D ] Potable
Description : Mathamoglobinemia or blue baby disease is caused due to (A) Chlorides (B) Nitrites (C) Nitrates (D) Sulphides
Last Answer : (C) Nitrates
Description : Maximum permissible colour for domestic water supplies, based on Cobalt scale, is (A) 5 P.P.M. (B) 10 P.P.M. (C) 15 P.P.M. (D) 20 P.P.M.
Last Answer : (D) 20 P.P.M.
Description : The maximum permissible size of aggregates to be used in casting the ribs of a slab, is (A) 5 mm (B) 7.5 mm (C) 10 mm (D) 15 mm
Last Answer : Answer: Option C
Description : The amount of commission on a Service money order for Rs 5000 is a) Rs 250/- b) Half rate of normal MO c) Nil d) None of these
Last Answer : c) Nil
Description : Fee to be collected when a regd parcel is redirected to the neighboring Distrust is a) Nil b) Half rate c) Amount of postage prepaid on the parcel d) Half the rate excluding the registration charge
Last Answer : d) Half the rate excluding the registration charge
Description : The amount of commission charged on a Service MO amounting to Rs. 1000/- is (a) Rs. 25/- (b) Rs.50/- (c) Rs. 100/- (d) NIL
Last Answer : (d) NIL
Description : . Amount of 2,4-D amine salt at 10 ppm for a pond measuring 40mx20mx5m a). 0.4 kg b). 400 kg c). 40 kg d). 4 kg
Last Answer : c). 40 kg
Description : Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that (A) Pure oxygen has been used for combustion ... very high (C) Excess air has been used for combustion (D) Hydrogen is not present in the fuel
Last Answer : (C) Excess air has been used for combustion
Description : The live load to be considered for an inaccessible roof, is (A) Nil (B) 75 kg/m2 (C) 150 kg/cm2 (D) 200 kg/m
Description : The live load to be considered for an accessible roof, is (A) Nil (B) 75 kg/m3 (C) 150 kg/m2 (D) 200 kg/cm
Description : In scanty rainfall regions, the camber provided will be (A) Nil (B) Flatter (C) Steeper (D) None of these
Description : Pick up the correct statement from the following: (A) The height of head light above road surface, is taken as 0.75 m (B) The beam of head light is up to one degree upwards from the grade of road (C) While designing the valley curve, the height of the object is assumed nil (D) All the above
Last Answer : Answer: Option D
Description : Vibrated concrete needs ________________slump values (a) High (b) Less (c) Nil (d) None of these
Last Answer : (b) Less
Description : If a concrete column 200 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 ... 15 Ec (A) 264 MN (B) 274 MN (C) 284 MN (D) 294 MN
Last Answer : (C) 284 MN
Description : A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2 ... area of steel required, is (A) 14 cm (B) 15 cm2 (C) 16 cm2 (D) 17 cm
Description : Minimum permissible speed on high speed roads, is decided on the basis of (A) 15 percentile cumulative frequency (B) 20 percentile cumulative frequency (C) 30 percentile cumulative frequency (D) 40 percentile cumulative frequency
Last Answer : Answer: Option A
Description : Which of the process is known as nitrification? (1) Reaction of Nitrogen Monoxide with oxygen to form nitric acid (2) Reaction of nitrogen dioxide with water to form nitric acid (3) Conversion of ammonia to nitrites (4) Conversion of nitrite to nitric oxide
Last Answer : Conversion of ammonia to nitrites
Description : The total amount of iodine in the body of an average adult is (A) 10–15 mg (B) 20–25 mg (C) 45–50 mg (D) 75–100 mg MINERAL METABOLISM 199
Last Answer : Answer : C
Description : Opening WDV off the block of assets was Rs 15 lakh. During the year, asset was acquired under this block on 15 June 2017 amounting to rupees 10 lakh. One of the assets falling within the block was sold for rupees 5.5 ... . rupees 1.95 lakh f. rupees 2.5 lakh g. rupees 2.25 lakh h. Rs 1.45 lakh
Last Answer : e. rupees 1.95 lakh
Description : Opening WDV off the block of assets was Rs 15 lakh. During the year, asset was acquired under this block on 15 January 2018 amounting to rupees 10 lakh. One of the assets falling within the block was sold for rupees 5.5 ... rupees 1.95 lakh b. rupees 2.5 lakh c. rupees 2.25 lakh d. Rs 1.45 lakh
Last Answer : d. Rs 1.45 lakh
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 : 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 : A hollow shaft of 1 m length is designed to transmit a power of 30 kW at 700 rpm. The maximum permissible angle of twist in the shaft is 1o. The inner diameter of the shaft is 0.7 times the outer diameter. The modulus of ... shaft is _______. (a) 43 to 45 (b) 50to 60 (c) 70 to 80 (d) 85 to 100
Last Answer : (a) 43 to 45
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 : Are EPDM coatings suitable for potable water?
Last Answer : EPDM Liquid Rubber can be applied to following substrates . For further information feel confident to contact us at call: 855-281-0940. Our experts are always willing to help.
Description : For classification of potable (drinking) water, we use a __________ filter. (A) Gravity sand (B) Plate and frame (C) Vacuum leaf (D) Rotary vacuum
Last Answer : (A) Gravity sand