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 CHEMICAL TECHNOLOGY 0%
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 FLUID MECHANICS 0%
 HEAT TRANSFER 0%
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 Answered
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Question 1 of 75
1. Question
1 pointsCategory: THERMODYNAMICSIn a throttling process which one of the following parameters remains constant ?
Correct
Incorrect

Question 2 of 75
2. Question
2 pointsCategory: MATHEMATICSWhat is the least number that can be added to 3500 to make it a perfect square?
Correct
59× 59 = 3481
60× 60 =3600
Required number 3600 – 3500 = 100Incorrect
59× 59 = 3481
60× 60 =3600
Required number 3600 – 3500 = 100 
Question 3 of 75
3. Question
1 pointsCategory: APTITUDEHow many digits are there in
Correct
Incorrect

Question 4 of 75
4. Question
1 pointsCategory: APTITUDEReplace the underlined parts with one of the options given below to correct the sentence
The small child does whatever his father was done.Correct
Incorrect

Question 5 of 75
5. Question
1 pointsCategory: APTITUDESelect the word out of the options which correctly analogizes the underlined words
The doctor declared that the patient has turned the corner.Correct
to change to a different path or root which leads to another direction. So for somebody to “turn the corner” – means he turned from the direction where she was previously heading towards, and headed towards a different direction.
Incorrect
to change to a different path or root which leads to another direction. So for somebody to “turn the corner” – means he turned from the direction where she was previously heading towards, and headed towards a different direction.

Question 6 of 75
6. Question
1 pointsCategory: APTITUDEFind correct sequence of the sentences:
P : not indeed in the sense that education has been universal
Q : our country has been a land of learning
R : and the learned man has been held in higher esteem than the warrior or administrator
S : but in the sense that education has been universalCorrect
Incorrect

Question 7 of 75
7. Question
2 pointsCategory: APTITUDEIn how many ways can a selection be made of 5 letter out of 5A’s , 4B’s , 3C’s , 2D’s and 1E ?
Correct
Incorrect

Question 8 of 75
8. Question
2 pointsCategory: APTITUDEA dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the customer. Besides, he also cheats both his supplier and his buyer by 100 grams while buying and selling 1 kilogram. Find the percentage profit earned by the shopkeeper ?
Correct
While buying
He buys 1100 grams instead of 1000 gms.
Suppose he bought 1100 grams for Rs. 1000
While selling
He sell only 900 grams when he takes the money for 1 kg.
Now as per question he sells at a 8% profit. (20% markup & 10 % discount)
Hence his selling price is Rs.1080 for 900 grams, to calculate profit percentage we will
equate the money.
1100 grams for Rs. 1000 (Buying)
1188 grams for Rs. 1080
900 grams for Rs. 1080 (selling)
Hence profit % =288/900 =32%Incorrect
While buying
He buys 1100 grams instead of 1000 gms.
Suppose he bought 1100 grams for Rs. 1000
While selling
He sell only 900 grams when he takes the money for 1 kg.
Now as per question he sells at a 8% profit. (20% markup & 10 % discount)
Hence his selling price is Rs.1080 for 900 grams, to calculate profit percentage we will
equate the money.
1100 grams for Rs. 1000 (Buying)
1188 grams for Rs. 1080
900 grams for Rs. 1080 (selling)
Hence profit % =288/900 =32% 
Question 9 of 75
9. Question
1 pointsCategory: APTITUDEAnil remembers that his friend Rakesh’s birthday falls after 20th of July but before 28th of July, while Rahul remembers that Rakesh’s birthday falls before 22nd of July but after the 12th of July. What is Rakesh’s exact date of birth, if they are both right?
Correct
Rakesh’s birthday has to fall between the 12th & the 28th of July. Anil remembers it to be after the 20th, while Rahul remember it to be before the 22nd . Hence to satisfy both conditions, simultaneously, Rakesh birthday must be on the 21st of July.
Incorrect
Rakesh’s birthday has to fall between the 12th & the 28th of July. Anil remembers it to be after the 20th, while Rahul remember it to be before the 22nd . Hence to satisfy both conditions, simultaneously, Rakesh birthday must be on the 21st of July.

Question 10 of 75
10. Question
2 pointsCategory: APTITUDEMost businesses in India use computer technology. A leading computer manufacturer with one million customers estimates that the only way it can be successful is if it increases it’s customer base to include half of all businesses in India that use computer technology.
Out of the options given below, point out what you feel is the correctmost reasoning in context to the paragraph given above.Correct
Option (A) ,(C) giving new data i.e 10 million business or 8 million business which is nowhere stated in problem .
Option (B) giving exact data not more than 1/4 th of all business uses computer technology which is also not stated in problem
Option (D) giving advice in positive way to increase indian business which is center of theme of problem
Incorrect
Option (A) ,(C) giving new data i.e 10 million business or 8 million business which is nowhere stated in problem .
Option (B) giving exact data not more than 1/4 th of all business uses computer technology which is also not stated in problem
Option (D) giving advice in positive way to increase indian business which is center of theme of problem

Question 11 of 75
11. Question
2 pointsCategory: APTITUDEFrom the alternatives given below, choose the one that correctly classifies the four sentences as a Fact (F), Judgement (J) or an Inference (I):
i. If India has embarked on the liberalization route, she cannot afford to go back.
ii. Under this circumstance, being an active supporter of WTO politics will be a good idea.
iii. The WTO is a truly global organisation aiming at freer trade.
iv. Many member countries have already drafted plans to simplify tariff structuresCorrect
Incorrect

Question 12 of 75
12. Question
1 pointsCategory: MATHEMATICSPerform the following operations on the matrix
(i) Add the 1st column to the 2nd column
(ii) Subtract the 3rd row from the 1st row
The determinant of the resultant matrix is ______Correct
Add the 1st column to the 2nd column, then
∴ Determinant of resultant matrix = 17[−15 +18] −10[−25 + 30] + 6[−45 + 45]
=51− 50 =1
Incorrect
Add the 1st column to the 2nd column, then
∴ Determinant of resultant matrix = 17[−15 +18] −10[−25 + 30] + 6[−45 + 45]
=51− 50 =1

Question 13 of 75
13. Question
1 pointsCategory: MATHEMATICS 
Question 14 of 75
14. Question
1 points 
Question 15 of 75
15. Question
1 pointsCategory: MATHEMATICS 
Question 16 of 75
16. Question
1 pointsCategory: MATHEMATICSWhich one of the following integrals is not convergent?

Question 17 of 75
17. Question
1 pointsCategory: PROCESS CALCULATIONSIf 4 kg of a gas occupies a volume of 0.14 m³ at 30ºC temperature and 1.4 bar pressure.
Calculate the molecular weight of the gas. Take R = 8314 J kg k. 
Question 18 of 75
18. Question
1 pointsCategory: PROCESS CALCULATIONSHow many kg atoms of oxygen are present in gaseous product formed by heating 200 kg of calcium carbonate?

Question 19 of 75
19. Question
1 pointsCategory: ECONOMICSThe present worth of a cash flow of Rs.50000 at the end of 5 years with the interest rate of 12% will be Rs._________.

Question 20 of 75
20. Question
1 pointsCategory: PROCESS CONTROL 
Question 21 of 75
21. Question
1 pointsCategory: MODERATE 
Question 22 of 75
22. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGCorrect
Incorrect

Question 23 of 75
23. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGState the correct statement among the following.
(P) The exit age distribution of fluid leaving a vessel is used to study the extent of nonideal flow in vessel.
(Q) Time constant of a mixer is equal to holdup time.
(R) Equilibrium state is dynamic.
(S) Rate constant of a reaction increases by increase in temperature.Correct
Incorrect

Question 24 of 75
24. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGLiquid phase reaction A→R, − r = kcA² taken place with 50% MFR. What will be the conversion if mixed flow reactor 6 times larger than original reactor?

Question 25 of 75
25. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGLiquid A decomposed by first order kinetic in batch reactor and 50% efficiency of A is at 5 min. What is the time required (in minutes) for 75% of ‘A’?

Question 26 of 75
26. Question
2 pointsCategory: CHEMICAL REACTION ENGINEERING 
Question 27 of 75
27. Question
2 pointsCategory: FLUID MECHANICSCalculate the diameter of a pipe(in mm) required to carry a flow of 50 lit/sec, if the loss head is not to exceed 6m per 1km. Assume f = 0.02

Question 28 of 75
28. Question
1 pointsCategory: CHEMICAL TECHNOLOGYWhy cracking furnaces are not operated at reduced absolute pressure?
Correct
Incorrect

Question 29 of 75
29. Question
2 pointsCategory: FLUID MECHANICSThe velocity of water in a pipe is measured of a pitot tube such that the stagnation pressure head is 8m and the static pressure head is 6m. Calculate the velocity of flow, if the coefficient of tube equal to 0.96.

Question 30 of 75
30. Question
2 pointsCategory: FLUID MECHANICSAn existing pipe line 1000m long consists of four sizes namely 30cm for 200m, 25cm for next 250m, 20 cm for next 250 m, and 15 cm for remaining length. Find the diameter (in m) of the uniform pipe of 1000m length to replace the compound pipe?

Question 31 of 75
31. Question
1 pointsCategory: HEAT TRANSFERThe left face of one dimensional slab off thickness 0.5m maintained at 90 ºC and right face is exposed to air at 30ºC. The thermal conductivity of the slab is 1.5 w/m.k and the heat transfer coefficient from the right face is 10 w/m²k. At steady state, the temperature of the right face in ºC will be__________(nearest integer).

Question 32 of 75
32. Question
2 pointsCategory: CHEMICAL TECHNOLOGYCorrect
Incorrect

Question 33 of 75
33. Question
1 pointsCategory: PROCESS CONTROLConsider unity feedback system shown below.
The value of derivative feedback constant ‘a’ , which will increase the damping ratio of the system to 0.7 is

Question 34 of 75
34. Question
2 pointsCategory: MASS TRANSFER 
Question 35 of 75
35. Question
1 pointsCategory: MASS TRANSFER 
Question 36 of 75
36. Question
2 pointsCategory: MASS TRANSFER 
Question 37 of 75
37. Question
1 pointsCategory: THERMODYNAMICSA heat engine is used to drive a heat pump. The heat transfers from the heat engine and from the heat pump are used to heat the water circulating through the radiators of a building. The efficiency of the engine is 27% and the coefficient of performance of the pump is 4. The ratio of the heat transfer to the circulating water and the heat transfer to the heat engine is_________.

Question 38 of 75
38. Question
2 pointsCategory: MATHEMATICSFor what values of μ the given system of equations x + y + z = 1, x + 2y + 4z =μ ,x + 4y+ 10z = μ² has no solution?

Question 39 of 75
39. Question
2 pointsCategory: MATHEMATICSLet x be normal variable with mean 8 and standard deviation 4 then P (X ≤ 5) is

Question 40 of 75
40. Question
2 pointsCategory: MATHEMATICS 
Question 41 of 75
41. Question
1 pointsCategory: MATHEMATICS 
Question 42 of 75
42. Question
2 pointsCategory: MATHEMATICS 
Question 43 of 75
43. Question
2 pointsCategory: MASS TRANSFER200 kg of solid (on dry basis) is converted to a drying process for a period of 5000 sec. The drying occurs in the constant rate period. With the drying rate as Nc =0.5 × 10^3 kg/m²s. The initial moisture content of the solid is 0.2kg moisture per kg dry solid. The interfacial are available for drying is 4m²/100 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid).

Question 44 of 75
44. Question
2 pointsCategory: CHEMICAL TECHNOLOGY65% Oleum is
Correct
Incorrect

Question 45 of 75
45. Question
2 pointsCategory: MASS TRANSFERCompound A is extracted from a solution of A + B into a pure solvent’S’. A cocurrent unit is used for the liquidliquid extraction. The inlet rate of the solution containing A is 200 mol of B/hm² and the solvent flow rate is 400ml of S/hm². The equilibrium data is represented by y = 3x² where y is in mol of A/mol of B and x is in mol of A/mol of S. The maximum percentage extraction achieved in the unit is________.

Question 46 of 75
46. Question
2 pointsCategory: PROCESS CONTROLBode stability criterion is defined as
Correct
Incorrect

Question 47 of 75
47. Question
1 pointsCategory: MASS TRANSFERFor absorbing sparingly soluble gas in liquid
Correct
Incorrect

Question 48 of 75
48. Question
1 pointsCategory: MASS TRANSFERWhich of the following is correct expression for absorption factor A?
Correct
Incorrect

Question 49 of 75
49. Question
1 pointsCategory: MASS TRANSFERWhich of the following is correct relation between A ( Absorption factot) and S( Strippng factor)
Correct
Incorrect

Question 50 of 75
50. Question
1 pointsCategory: MASS TRANSFERWhich of the following is correct expression for Freundlich Isotherm ?
Correct
Incorrect

Question 51 of 75
51. Question
1 pointsCategory: MASS TRANSFERFor a partly miscible pair system as temperature changes then equilibrium varies as ?
Correct
Incorrect

Question 52 of 75
52. Question
1 pointsCategory: MASS TRANSFERWhich of the following is correct for solvent in LLE ?
Correct
Incorrect

Question 53 of 75
53. Question
1 pointsCategory: MASS TRANSFERWhich of the following is correct for the equilateral triangular diagram ?
Correct
Incorrect

Question 54 of 75
54. Question
1 pointsCategory: MASS TRANSFERFind the composition of X
Correct
See perpendicular distance from base opposite to desired vertex , thickness of each strip is 20 unit .. easy huh !
Incorrect
See perpendicular distance from base opposite to desired vertex , thickness of each strip is 20 unit .. easy huh !

Question 55 of 75
55. Question
1 pointsCategory: MASS TRANSFERIn a single stage extraction process, 10 kg of pure solvent S [ Containing no solute A ] is mixed with 30 kg of feed F containing A at a mass fraction x_{F} = 0.2 . The mixture splits into an extract phase E & a raffinate phase R containing A at x_{E} = 0.5 & x_{R} = 0.05 respectively. The total mass of the extract phase in (KG) is
Correct
Incorrect

Question 56 of 75
56. Question
1 pointsProcess in which rubber is converted into a twin sheet is called
Correct
Calendaring
Incorrect
Calendaring

Question 57 of 75
57. Question
1 pointsCorrect
Incorrect

Question 58 of 75
58. Question
1 pointsgiven the counter flow heat exchanger, calculate the tube length (in m) necessary to perform the heat exchange requirement given below.
Correct
Incorrect

Question 59 of 75
59. Question
1 pointsFor splitting catalyst is
Correct
Zinc
Incorrect
Zinc

Question 60 of 75
60. Question
1 pointsCorrect
Incorrect

Question 61 of 75
61. Question
1 pointsCorrect
Incorrect

Question 62 of 75
62. Question
1 pointsCorrect
Incorrect

Question 63 of 75
63. Question
1 pointsCorrect
Incorrect

Question 64 of 75
64. Question
1 pointsCorrect
Incorrect

Question 65 of 75
65. Question
1 pointsCorrect
Incorrect

Question 66 of 75
66. Question
1 pointsCorrect
Incorrect

Question 67 of 75
67. Question
1 pointsCorrect
Incorrect

Question 68 of 75
68. Question
1 pointsCorrect
Incorrect

Question 69 of 75
69. Question
1 pointsA suitable material of construction to use with fuming sulfuric acid
Correct
Carbon steel
Incorrect
Carbon steel

Question 70 of 75
70. Question
1 pointsCommercially Ethylene is produced from NAPTHA by
Correct
Pyrolisis
Incorrect
Pyrolisis

Question 71 of 75
71. Question
1 pointsCorrect
Incorrect

Question 72 of 75
72. Question
1 pointsCorrect
Incorrect

Question 73 of 75
73. Question
1 pointsCorrect
Incorrect

Question 74 of 75
74. Question
1 points 
Question 75 of 75
75. Question
1 pointsCorrect
Incorrect
0sincostansin^{1}cos^{1}tan^{1}πex^{y}x^{3}x^{2}e^{x}10^{x}^{y}√x^{3}√x√xlnlog()1/x%n!789+MS456–M+123×M0.EXP÷MR±RNDC=MC 
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