Description : Consider efficiencies of hydro-turbines and generators. If the efficiency of a hydro-turbine is 80% and the efficiency of a generator is 90%, what is the overall efficiency of the unit? w) 85% x) 72% y) 90% z) 70%
Last Answer : ANSWER: X -- 72%
Description : Plant lost water in transpiration upto the extent of (a) 80%(b) 90% (c) 95% (d) 99%
Last Answer : (d) 99%
Description : Slow sand filter is used if maximum turbidity of raw water is less than (A) 10 gm/litre (B) 20 gm/litre (C) 30 gm/litre (D) 50 gm/litre
Last Answer : (D) 50 gm/litre
Description : Percentage of Earth surface which is covered by oceans and seas is A. 50% B. 65% C. 85% D. 97%
Last Answer : D. 97%
Description : Nandhini scored 996 marks out of 1200 marks and her elder brother kaviyarasan scored 1020 marks out of 1500 marks. Find the scored percentage which is better? a) 68% b) 83% c) 65% d) 85% e) 97%
Last Answer : Answer: A Percentage of marks scored by nandhini = (994/1200 × 100) = (99400/1200) = (994/12) = 83 % Percentage of marks scored by kaviyarasan = (1020/1500 × 100) = (102000/1500) = (1020/15) = 68 % Hence, the percentage marks scored by nandhini is better.
Description : In trickling filter, B.O.D. is reduced to A. 30 to 40% B. 40 to 60% C. 60 to 80% D. 80 to 90%
Last Answer : ANS: C
Description : Higher plant efficiency up to______ over the entire load range. a. 30%-50% b. 20%-40% c. 60%-90% d. 50%-80%
Last Answer : a. 30%-50%
Description : The sun makes up approximately what percent of matter in our solar system? w) 17% x) 50% y) 85% z) 99%
Last Answer : ANSWER: Z -- 99%
Description : Mud balls may be removed by (A) Breaking and washing (B) Washing the filter with a solution of caustic soda (C) Removing, cleaning and replacing the damaged sand (D) All the above
Last Answer : (D) All the above
Description : Net protein utilization of milk protein is (A) 75% (B) 80% (C) 86% (D) 91%
Last Answer : Answer : A
Description : In slow sand filters, the turbidity of raw water can be removed only up to (A) 60 mg/litre (B) 75 mg/litre (C) 100 gm/litre (D) 150 mg/litre
Last Answer : (A) 60 mg/litre
Description : Concentration of H2SO4 catalyst in alkylation is kept between 90-98%, because H2SO4 having concentration. (A) Less than 90% promotes polymerisation (B) More than 98% promotes cracking (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : An "International Unit" of penicillin activity established in 1944 is amount of penicillin equivalent to A.0.6 micrograms of crystalline penicillin G of about 98% purity B.0.6 micrograms of crystalline ... G of about 98% purity D.0.8 micrograms of crystalline penicillin G of about 90% purity
Last Answer : A.0.6 micrograms of crystalline penicillin G of about 98% purity
Description : A high velocity of wash water is required for (A) Rapid gravity filter with strainers (B) Rapid gravity filter without strainers (C) Slow sand filter with strainers (D) Slow sand filter without strainers
Last Answer : (B) Rapid gravity filter without strainers
Description : Distribution of wash water is provided in (A) Sedimentation tank (B) Slow sand filter (C) Rapid gravity filter (D) All the above
Last Answer : (C) Rapid gravity filter
Description : After cleaning a slow sand filter, the filtered water is not used for (A) 6 hours to 12 hours (B) 12 hours to 18 hours (C) 18 hours to 24 hours (D) 24 hours to 36 hours
Last Answer : (D) 24 hours to 36 hours
Description : Pick up the incorrect statement from the following: (A) The water entering the slow sand filters should be treated by 9.386 coagulants (B) The depth of water on the filter should be twice the ... is 0.75 times the depth of filter sand, the water obtained is purest (D) All the above
Description : Desirable "Micum Index" values of metallurgical coke are (A) M40 > 78% and M10 < 10% (B) M40 > 4% and M10 < 80% (C) M40 > 10% and M10 < 78% (D) M40 > 98% and M10 < 2%
Last Answer : (A) M40 > 78% and M10 < 10%
Description : Pick out the wrong statement. (A) Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80% (B) Contact process of sulphuric acid manufacture produces pure acid of ... of 20% oleum (D) Contact process of sulphuric acid manufacture uses nickel as the catalyst
Last Answer : (D) Contact process of sulphuric acid manufacture uses nickel as the catalyst
Description : Rapid sand filter (A) Should be preceded by coagulation and sedimentation (B) Uses rapid sand as filter media (C) Is used after slow sand filtering has been done (D) Can combine disinfection also
Last Answer : (A) Should be preceded by coagulation and sedimentation
Description : The period of cleaning of a slow sand filter, is usually (A) 5 to 10 days (B) Two weeks to three weeks (C) One month to three months (D) Three months to six months
Last Answer : (C) One month to three months
Description : The yield of a rapid gravity filter as compared to that of slow sand filter, is (A) 10 times (B) 15 times (C) 20 times (D) 30 times
Last Answer : (D) 30 times
Description : A slow sand filter is cleaned if its filter head is higher than (A) 10 cm to 20 cm (B) 20 cm to 40 cm (C) 40 cm to 70 cm (D) 70 cm to 120 cm
Last Answer : (D) 70 cm to 120 cm
Description : The following proportion of the total body calcium is present in bones and teeth: (A) 75% (B) 90% (C) 95% (D) 99%
Last Answer : Answer : D
Description : What percentage of cyclohexane molecule is estimated to be in the boat form at any given time? (a) over 99% (b) between 90% and 99% (c) approximately 50% (d) less than 1%
Last Answer : less than 1%
Description : For amalgamation in the nature of merger, the shareholders holding at least ______ or more of the equity shares of the transferor company becomes the equity shareholders of the transferee company. A. 51% B. 90% C. 99% D. 100%
Last Answer : B. 90%
Description : In blood, the percentage of water is _____. A. 75% B. 85% C. 90% D. 95%
Last Answer : ANSWER: C
Description : In blood, the percentage of water is------? A. 75% B. 85% C. 90% (Answer) D. 95%
Last Answer : C. 90% (Answer)
Description : Percentage of surface of Earth which is covered by water is A. 70% B. 85% C. 90% D. 60%
Last Answer : A. 70%
Description : The sum of the percentage of tricalcium silicate and dicalcium silicate for Portland cement varies from. (a) 50 to 60% (b) 60 to 70% (c) 70 to 80% (d) 80 to 90%
Last Answer : (c) 70 to 80%
Description : In Portland Blast furnace slag cement, the blast furnace slag content shall not exceed [ A ] 50% [ B ] 65% [ C ] 80% [ D ] 90%
Last Answer : [ B ] 65%
Description : What percent solution of NaCl is considered isotonic to mammalian RBCs. a. 0.8% b. 0.85% c. 0.90% d. 0.95%
Last Answer : 0.85%
Description : Saravanan has scored an total of 90% in an examination with five subjects in the ratio 18:14:15:21:22. If 85% is the marks required to get an ‘A’ grade in each subject, then find in how many subjects did he get an ‘A’ grade. Given that the maximum marks in each subject is 120. A) 2 B) 3 C) 4 D) 5
Last Answer : Answer: B) Maximum total marks = 5 120 = 600 Marks scored by Saravanan = 90/100*600=540 Let the marks scored by him in the 5 subjects be 18x,14x,15x,21x and 22x respectively. 18x + 14x + 15x + 21x + ... A' grade i.e. 0.85 120 = 102 Therefore, he has got an A' grade in 3 subjects.
Description : For design of sewers, percentage of sewage discharge is assumed A. 65 to 70% B. 70 to 75% C. 75 to 80% D. 85%
Description : Rectified spirit contains alcohol about ? A. 80% B. 95% (Answer) C. 70% D. 85%
Last Answer : B. 95% (Answer)
Description : In Kinnow mandarin, fruit drop in month of June is upto: a. 70% b. 75% c. 80% d. 85%
Last Answer : 75%
Description : Water filtration rate in a slow sand filter ranges from __________ litres/m2 /hr. (A) 10 to 20 (B) 100 to 200 (C) 1500 to 2500 (D) 4000 to 5000
Last Answer : (B) 100 to 200
Description : Which one of these statements is correct? A. There is a slow decline in digital budgets with an average reduction of 10% in digital marketing budget. B. 98% of marketers affirm that offline ... 50% less than marketing professionals. D. Around 25% of the global population is now on the Internet.
Last Answer : B. 98% of marketers affirm that offline and online marketing are merging
Description : Which one of these statements is correct? A. There is a slow decline in digital budgets with an average reduction of 10% in digital marketing budget. B. 98% of marketers affirm that offline ... 50% less than marketing professionals. D. Around 25% of the global population is now on the Internet
Description : Milk contains water A. 70% B. 75% C. 80% (Answer) D. 90%
Last Answer : C. 80% (Answer)
Description : What percentage of the human body is composed of water? a. 50% b. 80% c. 90%
Last Answer : B. 80%
Description : Contribution of albumin to colloid osmotic pressure of plasma is about (A) 10% (B) 50% (C) 80% (D) 90%
Last Answer : Answer : C