For ethanol-water system, the lowering of distillate quality from 95%
to 92% will cause __________ plate requirement.
(A) No change in theoretical
(B) Marginal decrease in the number of
(C) Major decrease in the number of
(D) None of these
Description : The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by (A) Raising the temperature (B) Lowering the total pressure (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B
Description : Absolute alcohol is 1. Pure ethanol 2. 95% alcohol and 5% water 3. 200% proof 4. Rectified spirit The correct answers are: (a) 1 and 2 (b) 1 and 4 (c) 1 and 3 (d) 2 and 3
Last Answer : Ans:(c)
Description : In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux. (A) Total (B) Minimum (C) Operating (D) Maximum permissible
Last Answer : (A) Total
Description : Rectified spirit is (a) 100% Ethanol (b) 90% Ethanol (c) 100% Methanol (d) 95% Ethanol
Last Answer : 95% Ethanol
Description : The maximum concentration of ethanol that is achieved by successive distillation of fermentation broth in continuous stills is A- .60% B- 95% C- .70% D- 99%
Last Answer : 95%
Description : Pick out the correct statement. (A) The slope of the stripping line is always less than unity (B) For a given separation in a binary distillation column, with increase in reflux ratio ( ... (D) Kremser-Brown-Souder's equation is used to calculate the efficiency of a plate tower
Last Answer : C) In Ponchon-Savarit method of no. of theoretical plate determination, the stripping and rectifying operating lines are vertical at total reflux
Description : Monascus purpureus is a yeast used commercially in the production of (a) ethanol (b) streptokinase for removing clots from the blood vessels (c) citric acid (d) blood cholesterol lowering statins.
Last Answer : (d) blood cholesterol lowering statins.
Description : Match the following list of microbes and their importance. Column I Column II A. Saccharomyces (i) Production of cerevisiae immuno- suppressive agent B. Monascus (ii) Ripening of Swiss purpureus cheese C. Trichoderma (iii)Commercial ... C-(i), D-(ii) (d) A-(iv), B-(iii), C-(ii),D-(i)
Last Answer : (c) A-(iii), B-(iv), C-(i), D-(ii)
Description : Monascus purpureus is a yeast used commercially in the production of (1) Blood cholesterol lowering statins (2) Ethanol (3) Streptokinase for removing clots from the blood vessels (4) Citric acid
Last Answer : (1) Blood cholesterol lowering statins
Description : Theoretical bandwidth requirement for FM system is: (1) Same as that of the modulating signal bandwidth (2) Twice of modulating signal Bandwidth (3) Thrice as of modulating signal Bandwidth (4) Infinite
Last Answer : Theoretical bandwidth requirement for FM system is: Infinite
Description : Resorce requirement in project becomes constant while the project is in its _____ progress stage. (A) 40 to 55% (B) 55 to 70% (C) 70 to 80% (D) 80 to 95%
Last Answer : (D) 80 to 95%
Description : Resorce requirement in project becomes constant while the project is in its progress stage. (A) 40 to 55% (B) 55 to 70% (C) 70 to 80% (D) 80 to 95%
Description : Resource requirement in project becomes constant while the project is in its progress stage. A. 40 to 55% B. 55 to 70% C. 70 to 80% D. 80 to 95%
Last Answer : D. 80 to 95%
Description : Pick out the correct statement. (A) Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of ... Flash distillation is suitable for separating components which have very close boiling temperature
Last Answer : (A) Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of nonideal binary system by distillation
Description : Pick out the wrong statement. (A) Different solids have different equilibrium moisture curves (B) Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele method of ... (D) Even a forced draft cooling tower cannot cool water below the wet bulb temperature
Last Answer : (C) Heat removal load on cooler remains constant, even with increase of the reflux ratio in a distillation column
Description : The thermal efficiency of a diesel engine is of the order of a. 92% b. 68% c. 34% d. 25%
Last Answer : ANSWER c. 34%
Description : A three phase induction motor is drawing 16 Ampere at 440 Volts. If the operating power factor of the motor is 0.90 and the motor efficiency is 92%, then the mechanical shaft power output of the motor is a) 12.04 kW b) 10.09 kW c) 10.97 kW d) None of the above
Last Answer : b) 10.09 kW
Description : In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalent to a theoretical plate HTUOG = overall gas phase height of a transfer unit). (A) Straight (B) Parallel (C) Both (A) & (B) (D) Neither (A) nor (B
Last Answer : (C) Both (A) & (B)
Description : Reboiler is considered as one theoretical plate, because (A) Of the assumption that vapour and liquid leaving the reboiler are in equilibrium (B) Vapour is recycled to the column (C) Reboiler itself contains one plate (D) None of these
Last Answer : (A) Of the assumption that vapour and liquid leaving the reboiler are in equilibrium
Description : In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because (A) Temperature is less (B) Total pressure is less (C) Mixing of steam ... not so intimate as to result in equilibrium condition (D) Saturated steam is used for steam distillation
Last Answer : (C) Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition
Description : In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be ... metres above the ground (C) 5 metres above ground (D) 10 metres above ground
Last Answer : (A) At ground level
Description : The air requirement of a petrol engine during starting compared to the theoretical air requirement for complete combustion is A. more B.unpredictable C. same D. less
Last Answer : ANSWER : D
Description : The air requirement of a petrol engine during starting compared to theoretical air required for complete combustion is a. more b. less c. same d. may be more or less depending on engine capacity
Last Answer : ANSWER b. less
Description : The number of ml of N/10 KOH required to neutralize the fatty acids in the distillate from 5 gm of fat is called (A) Reichert-Meissel number (B) Polenske number (C) Acetyl number (D) Non volatile fatty acid number
Last Answer : Answer : A
Description : If a flat plate with a circular hole is subjected to tensile force, then its theoretical stress concentration factor is? a) 2 b) 3 c) 4 d) 1
Last Answer : b) 3
Description : Two liquids (A)and(B)are separated by fractional distillation, the boiling point of (A) is less than (B).which liquid comes out first in distillate? Explain.
Last Answer : The liquid (a) comes out first in distillate. On boiling the vapours of lower boiling component are formed first.
Description : The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number. (A) Increases (B) Decreases (C) Remain same (D) May increase or decrease
Last Answer : (B) Decreases
Description : If the price elasticity of demand of Chicken is +.95. then a 20% increase in price of chicken will lead to in quantity demanded of chicken at that price (a) 19 increase ; (b) 19% decrease ; (c) 20.95% increase ; (d) 20.6% decrease
Last Answer : (a) 19 increase ;
Description : To improve a chromatographic separation, you must A. Increase the number of theoretical plates on the column. B. Increase the height of the theoretical plates on the column. C. Increase both the number ... the column. D. Decrease both the number and the height of the theoretical plates on the column
Last Answer : Increase the number of theoretical plates on the column
Description : State the requirement of good quality material which plays the major role in highway construction
Last Answer : The materials which plays major role in highway construction are: a) Soil b) Bitumen c) Cement d) Stone e) Concrete f) Sand Requirements: a) Soil: i) It should be clean and coarse. ii ... . vii) It should be strong and durable. It should be clean and free from coatings of clay and silt.
Description : More than 95% of __________ is present in corundum. (A) SiO2 (B) Al2O3 (C) CaSiO2 (D) MgO
Last Answer : B) Al2O3
Description : At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation. (A) Operating (B) Total (C) Minimum (D) Maximum permissible
Last Answer : (B) Total
Description : The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperatureconstant, will (a) increase (b) decrease (c) may increase or decrease depending on the type of refrigerant used (d) remain unaffected
Last Answer : Ans: a
Description : Pick up the correct statement from the following: A. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers B. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated ... river C. Solubility of oxygen in sewage is 95% of that of distilled water D. All the above
Last Answer : ANS: D
Description : Consider the following statements: 1. The benefit of surcharge and depth of foundation is only marginal in case of footings on purely cohesive soils. 2. The bearing capacity of a footing in pure clay increases with increase in size of the ... , 2 & 3 (b) 1 & 2 only (c) 2 & 3 only (d) 1 & 3 only
Last Answer : (d) 1 & 3 only
Description : Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be __________ ft. (A) 40 (B) 34 (C) 8 (D) 37
Last Answer : (C) 8
Description : The major product H in the given reaction sequence is `CH_(3)-CH_(2)-CO-CH_(3) overset(._(Theta)CN)toG overset(95% H_(2)SO_(4)) underset("Heat")toH`
Last Answer : The major product H in the given reaction sequence is `CH_(3)-CH_(2)-CO-CH_(3) overset(._(Theta)CN) ... CH=underset(CH_(3))underset(|)(C)-CO-NH_(2)`
Description : How does relative humidity over 95% cause excessive tape and head wear?
Last Answer : High humidity causes increased friction as the tape passes over the heads.
Description : Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller. (A) Radius of (B) Speed of (C) Fluid velocity leaving (D) None of these
Last Answer : (D) None of these
Description : In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller. (A) Speed of (B) Diameter of (C) Fluid velocity leaving (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is __________ Nm3. (A) 0.5 (B) 1 (C) 1/3 (D) 2.5
Last Answer : Option D
Description : With increase in pump speed, its NPSH requirement (A) Decreases (B) Increases (C) Remains unaltered (D) Can either increase or decrease; depends on other factors
Last Answer : (B) Increases
Description : When marginal cost is equal to marginal revenue, the firm should A)produce more to increase profits. B)produce less to decrease total costs. C)stop producing additional units to maximise profits. D)provide discounts to encourage purchases.
Last Answer : C)stop producing additional units to maximise profits.
Description : .An increases in investment is most likely to be caused by (a) Lower interest rates (b) Expectations of lower national incomes © A decrease in the marginal propensity to consume (d) An increase in withdrawals.
Last Answer : (a) Lower interest rates
Description : An increase in investment is caused by (a) Lower interest rates (b) Expectations of lower national income © A decrease in the marginal propensity to consume (d) An increase in withdrawals
Description : Which of these costs will increase or decrease with increase in production (a) Marginal cost ; (b) Financial costs ; (c) Fixed costs ; (d) All the three
Last Answer : (a) Marginal cost ;
Description : The minimum number of theoretical plates is required for achieving a given separation in distillation column with (A) No reflux (B) Total reflux (C) Zero reflux ratio (D) Minimum reflux ratio
Last Answer : (B) Total reflux
Description : . A batch reactor suffers from following disadvantage. (A) Poor product quality control (B) High labour and handling cost (C) High shutdown time requirement for emptying, cleaning and refilling (D) All (A), (B) and (C)
Description : Newton's rings experiment is performed with air gap between lens and plate. Now that gap is filled with water. What will be effect on radius (or diameter)? (a) Radius (or diameter) will remain ... or diameter) will increase (c) Radius (or diameter) will decrease (d) There will be no effect
Last Answer : (c) Radius (or diameter) will decrease
Description : Respiratory acidosis is that in which the blood pH is low due to increased retention of carbon dioxide caused by the lowering of the respiratory frequency or by pulmonary diseases that impair ... caused by metabolic disturbances that increase the concentration of bases (alkalis) in the blood.
Last Answer : Where are the chemoreceptors that detect the acidity of the blood and trigger the respiratory compensation located?