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Full Length Test #10
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 APTITUDE 0%
 CHEMICAL REACTION ENGINEERING 0%
 ECONOMICS 0%
 FLUID MECHANICS 0%
 HEAT TRANSFER 0%
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Question 1 of 65
1. Question
1 pointsCategory: APTITUDEChoose the word that does not belong to the group.
Correct
Barrack, duplex and gazebo are spaces used for specific purposes while imbrue (which means soaked) does not fit in the group.
Incorrect
Barrack, duplex and gazebo are spaces used for specific purposes while imbrue (which means soaked) does not fit in the group.

Question 2 of 65
2. Question
1 pointsCategory: APTITUDEThere is a probability that he was charged with being ______; that many who boasted themselves of _____ and soberness, and wisdom, regarded him as acting like a madman.
Correct
The man was treated as madman, hence the word in the first blank will be ‘deranged’; the others (many) considered themselves to be sober and wise hence ‘prudence’ fits in the second blank.
Incorrect
The man was treated as madman, hence the word in the first blank will be ‘deranged’; the others (many) considered themselves to be sober and wise hence ‘prudence’ fits in the second blank.

Question 3 of 65
3. Question
1 pointsCategory: APTITUDEThe length of a rectangular plot is 20 metres more than its breadth. If the cost of fencing the plot @ 26.50 per metre is Rs. 5300, what is the length of the plot in metres?
Correct
Let breadth = x metres.
Then, length = (x + 20) metres.perimeter = 5300/26.5 m = 200 m
Hence, length = x + 20 = 60 m.
Incorrect
Let breadth = x metres.
Then, length = (x + 20) metres.perimeter = 5300/26.5 m = 200 m
Hence, length = x + 20 = 60 m.

Question 4 of 65
4. Question
1 pointsCategory: APTITUDEChoose the word which is most nearly the SAME in meaning as the word given in bold as used in the passage.
CATACLYSMICCorrect
Cataclysmic and catastrophic means disastrous.
Incorrect
Cataclysmic and catastrophic means disastrous.

Question 5 of 65
5. Question
1 pointsCategory: APTITUDEEach question gives a sentence with a part of the sentence underlined that may contain an error. Four alternative substitutes are given for the underlined portion. Identify the choice that replaces the underlined part to form a logically and grammatically correct statement and mark its number as your answer.
As these changes in the rock are greatest at the surface and diminish downward, we infer that they have been caused by agents that were working downward in the surface.Correct
Option A uses past continuous tense which is not required since a truth is mentioned which should be in present tense. Option B is wrong because there is unnecessary use of present continuous tense. Option C is wrong because ‘so’ changes the meaning of the sentence and ‘downward on the surface’ should be replaced with ‘downward from the surface’.
Incorrect
Option A uses past continuous tense which is not required since a truth is mentioned which should be in present tense. Option B is wrong because there is unnecessary use of present continuous tense. Option C is wrong because ‘so’ changes the meaning of the sentence and ‘downward on the surface’ should be replaced with ‘downward from the surface’.

Question 6 of 65
6. Question
2 pointsCategory: APTITUDETwo pipes A and B can fill a tank in 1 hour 12 minutes and 1 hour 30 minutes respectively. Pipe C can empty the tank in 1 hour. Initially pipes A and B are opened and after 14 minutes C is also opened. In how much time will the tank be full?
Correct
Time taken by A to fill the tank = 72 min
Time taken by B to fill the tank = 90 min
Time taken by C to empty the tank = 60 min
Pipes A and B are opened for 14 min.
Part of the tank filled isIncorrect
Time taken by A to fill the tank = 72 min
Time taken by B to fill the tank = 90 min
Time taken by C to empty the tank = 60 min
Pipes A and B are opened for 14 min.
Part of the tank filled is 
Question 7 of 65
7. Question
2 pointsCategory: APTITUDE“ 4X68Y0 ” is divisible by both 3 & 11. The non zero digits in the place of x & y are
Correct
4 +x+ 6+ 8+ y+ 0 must be divisible by 3
18+x+y must be divisible by 3
and, (x +8+ 0) (4+ 6+ y)
x y 2 must be either 0 or 11
xy2=0 y =x 2
18 +x+ x 2 = 16+ 2x
x can be only 7
y= 5Incorrect
4 +x+ 6+ 8+ y+ 0 must be divisible by 3
18+x+y must be divisible by 3
and, (x +8+ 0) (4+ 6+ y)
x y 2 must be either 0 or 11
xy2=0 y =x 2
18 +x+ x 2 = 16+ 2x
x can be only 7
y= 5 
Question 8 of 65
8. Question
2 pointsCategory: APTITUDEThe missing P & Q in the following series respectively are
Correct
6 = LCM of (2&3) ; 12 = LCM of (3,4)
20 = LCM of (4,5) ; 30 = LCM of (5,6)
So the missing numbers P = LCM of (12, 60) = 60
and Q = LCM of (60, 60) = 60Incorrect
6 = LCM of (2&3) ; 12 = LCM of (3,4)
20 = LCM of (4,5) ; 30 = LCM of (5,6)
So the missing numbers P = LCM of (12, 60) = 60
and Q = LCM of (60, 60) = 60 
Question 9 of 65
9. Question
2 pointsCategory: APTITUDEThe distance between two stations A and B is 600 km. One train leaves station A towards station B at the average speed of 54 kmph. After an hour another train left station B towards station A at the average speed of 66 km per hour. The distance from station A where the two trains meet is________Kms.
Correct
Distance between A and B is 600km
Speed of first train = 54km/hr
Speed of second train = 66km/hr
But 2nd train started 1 hr after the first. So first train might have covered 54 km
Relative speed = 54 + 66 = 120km/hr
Time taken 546/120 =4.55
First train travels 54 × 4.55 km i.e. 299.7km by the time they meetIncorrect
Distance between A and B is 600km
Speed of first train = 54km/hr
Speed of second train = 66km/hr
But 2nd train started 1 hr after the first. So first train might have covered 54 km
Relative speed = 54 + 66 = 120km/hr
Time taken 546/120 =4.55
First train travels 54 × 4.55 km i.e. 299.7km by the time they meet 
Question 10 of 65
10. Question
2 pointsCategory: APTITUDEChoose the option that best captures the essence of the given text.
The birth of the embellishing art must be sought in that stage of animal development when instinct began to discover that certain attributes or adornments increased attractiveness. When art in its human sense came into existence ideas of embellishment soon extended from the person, with, which they had been associated, to all things with which man had to deal. The processes of the growth of the aesthetic idea are long and obscure.Correct
Option A is wrong because ‘intellect’ is not given in the paragraph. Option C can be eliminated because it represents ‘long process of growth of aesthetic ideas’ as a hurdle by using the word ‘though’. Option D is wrong since it was not instinct that was discovered.
Incorrect
Option A is wrong because ‘intellect’ is not given in the paragraph. Option C can be eliminated because it represents ‘long process of growth of aesthetic ideas’ as a hurdle by using the word ‘though’. Option D is wrong since it was not instinct that was discovered.

Question 11 of 65
11. Question
1 pointsCategory: MATHEMATICSIf f(x) is differentiable and g′(x) > 0 such that f(1)=2, g(1)=2, f(2)=8 and f ′(x) = 2g′(x) for each x in [1,2] then the value of g(2) is ____
Correct
Since f(x) and g(x) satisfied the conditions of cauchy’;s mean value theorem in [1,2]
Incorrect
Since f(x) and g(x) satisfied the conditions of cauchy’;s mean value theorem in [1,2]

Question 12 of 65
12. Question
1 pointsCategory: MATHEMATICSThe value of AB if
Correct
Incorrect

Question 13 of 65
13. Question
1 pointsCategory: MATHEMATICSThe real root of the equation 7x3cosx1=0 upto four decimal accuracy is ___
Correct
Incorrect

Question 14 of 65
14. Question
1 pointsCategory: MATHEMATICS3 students A, B, C are in a running race. A & B have the same probability of winning and each is twice as C. The probability that B or C wins is ____
Correct
Incorrect

Question 15 of 65
15. Question
1 pointsCategory: MATHEMATICSA vector field is called solenoidal if its divergence is zero. Consider the vector fields P and Q given by
div p = 0 (solenoidal)
Correct
Incorrect

Question 16 of 65
16. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGFor recycle ratio R = ∞ , pick up correct statement of the following.
Correct
Incorrect

Question 17 of 65
17. Question
1 pointsCategory: HEAT TRANSFERWhich of the following statement is / are correct?
Correct
Incorrect

Question 18 of 65
18. Question
1 pointsCategory: HEAT TRANSFERWhich of the following is the correct equation?
Correct
Incorrect

Question 19 of 65
19. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGFor the following curve, which reactor gives maximum yield?
Correct
Area under the curve is maximum for the mixed flow reactor.
∴ For maximum yield= Area under the curve should be maximum.
∴ plug flow reactor will give maximum yield.Incorrect
Area under the curve is maximum for the mixed flow reactor.
∴ For maximum yield= Area under the curve should be maximum.
∴ plug flow reactor will give maximum yield. 
Question 20 of 65
20. Question
1 pointsCategory: PROCESS CONTROLFor a step change of magnitude 0.5, the transfer function ‘C’ is given by

Question 21 of 65
21. Question
1 pointsCategory: HEAT TRANSFERCalculate the radiative heat transfer (in W / m² K ) coefficient based on the data provided. Temperature of black body of finite dimension = 1500K .Temperature of the infinite medium in which black body is placed = 500K

Question 22 of 65
22. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGThe instantaneous yields for the reactor given below at CA1 = 2 mol/l and CA2 = 1 mol/l are related as
Correct
Incorrect

Question 23 of 65
23. Question
1 pointsCategory: FLUID MECHANICSThe coefficient of performance of a heat pump is 3 and the net work input is 10000 kJ. The value Qout and in Qin are ____ and ___ respectively.
Correct
Qout=3×10000 = 30000 kJ; Qin =Qout −W =30000 −10000 = 20000 kJ
Incorrect

Question 24 of 65
24. Question
1 pointsCategory: MASS TRANSFERA particular mass transfer operation can be represented as follows:
Which of the following is correct?
Correct
Apply graphical construction method for NTU and NTP, clearly we can observe for parallel operating line and equilibrium line both are equal when slope of operating line more than equilibrium line , so NTU > NTP.
Incorrect
Apply graphical construction method for NTU and NTP, clearly we can observe for parallel operating line and equilibrium line both are equal when slope of operating line more than equilibrium line , so NTU > NTP.

Question 25 of 65
25. Question
1 pointsIn order to control the temperature of a process, a pneumatic controller is used within the range of 50 to 120ºF. The controller is adjusted so that the output pressure goes from 3psi (valve fully open) to 15psi (valve fully closed) as the measured temperature goes from 60 to 64ºF with the set point held constant. The gain of the controller is ________ psi/ º F .
Correct
Incorrect

Question 26 of 65
26. Question
1 pointsCategory: FLUID MECHANICSWhich of the following statements is accurate for progressing cavity pump?
Correct
It pumps materials with larger particles and the progressive cavity pump consists of a helical rotor.
Incorrect
It pumps materials with larger particles and the progressive cavity pump consists of a helical rotor.

Question 27 of 65
27. Question
1 pointsCategory: MECHANICAL OPERATIONSConsider a tank in which a suspension of uniform particles in water at a concentration of 250kg of solids per cubic meter of slurry is settling. If the density of the particles is 2000 kg/m³, then the void fraction will be______.
Correct
Incorrect

Question 28 of 65
28. Question
1 pointsCategory: THERMODYNAMICSThe adiabatic line and psychometric line become essentially same when
Correct
Incorrect

Question 29 of 65
29. Question
1 pointsCategory: FLUID MECHANICSA pressure gage on the receiver of an air compressor gives a reading of 0.1MPa (gage). If the atmospheric pressure is 200 kPa , then the absolute pressure in the tank will be ________ MPa.
Correct
Incorrect

Question 30 of 65
30. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGIn an first order reaction which is taking place in a 20 litre constant – volume batch reactor operating isothermally at 298K, the time required for 50% conversion of 10 mole of A is ________ minutes.
Assume the reaction is first order with respect to A with KA = 0.1min−¹ at 298K.Correct
Incorrect

Question 31 of 65
31. Question
1 pointsCategory: CHEMICAL REACTION ENGINEERINGA CSTR of volume 10m³ is operating with a steady – state (liquid) feed rate of 15 m³ / hr . The fraction of the exit stream, which is of age less than 8 min is
Correct
Incorrect

Question 32 of 65
32. Question
1 pointsCategory: PROCESS CONTROLA system is having a transfer function which is given by When a step change of magnitude 8 is introduced, the ultimate value of y(t ) would be equal to ________.
Correct
Incorrect

Question 33 of 65
33. Question
1 pointsCategory: ECONOMICSThe purchase cost of 100 gal glasslined, jacketed reactor was 4 lakhs in 1990. What is the purchase cost of similar 500 gal, glasslined, jacketed reactor in 1995? The following data is provided for cost index to be used in common to all industries. The equipment Vs capacity index is 0.5.
Correct
Incorrect

Question 34 of 65
34. Question
2 pointsCategory: FLUID MECHANICSA cylinder of diameter 50.1 mm has a piston of diameter 50 mm which is moving inside of it. Determine the percent decrease in force necessary to move the piston when the lubricant warms from 0ºC to 125ºC. Assume the values of μ for the lubricant as 0.015 Pa⋅s at 0ºC and 0.003 Pa⋅s at 125ºC.
Correct
Incorrect

Question 35 of 65
35. Question
2 pointsCategory: MATHEMATICSFind
Correct
Incorrect

Question 36 of 65
36. Question
2 pointsCategory: MATHEMATICSIf z = x + iy then the region represented by 2Ιz −1Ι < Ιz − iΙ is
Correct
Incorrect

Question 37 of 65
37. Question
1 pointsCategory: MATHEMATICSAssume that 50% of all engineering students are good in mathematics. The probability that in a sample of 18 engineering students, at most 8 are good in mathematics is
Correct
Incorrect

Question 38 of 65
38. Question
1 pointsCategory: MATHEMATICSThe magnitude of y at x =π/4 is ____ .
Correct
Incorrect

Question 39 of 65
39. Question
2 pointsCategory: HEAT TRANSFERConsider an uninsulated steam pipe passing through a room in which air and walls are maintained at 20ºC. The outside diameter at the pipe is 50mm and its surface temperature and emissivity are 150ºC and 0.6 respectively. The surface emissive power and the irradiation of the pipe will be ______ and _________ respectively.
Correct
Incorrect

Question 40 of 65
40. Question
1 pointsCorrect
Incorrect

Question 41 of 65
41. Question
1 pointsCorrect
Incorrect

Question 42 of 65
42. Question
1 pointsCorrect
Incorrect

Question 43 of 65
43. Question
1 pointsAn ideal gas at 27 °C and 0.2MPa is enclosed in a cylinder by a frictionless piston, and the gas slowly forces the piston up so that the volume of gas expands from 0.1m³ to 30.2m ³, by following two different paths. Patha= constant pressure path Pathb= constant temperature path The work done by gas in Patha is _______ the work done by the gas in Pathb.
Correct
Incorrect

Question 44 of 65
44. Question
1 pointsCorrect
Incorrect

Question 45 of 65
45. Question
1 pointsCorrect
Incorrect

Question 46 of 65
46. Question
1 pointsInitial value will be_____ times salvage value of a pump, which is having a useful period of 4 years and asset values after 2 years and 3 years are in the ratio of 4:2. Use declining balance method of depreciation
Correct
Incorrect

Question 47 of 65
47. Question
1 pointsCorrect
Incorrect

Question 48 of 65
48. Question
1 pointsA sample of 5000ml of unfiltered and filtered water gave a solid residue of 0.515g and 0.500g respectively. The total solids dissolved as well as suspended is_________ppm
Correct
Incorrect

Question 49 of 65
49. Question
1 pointsHow many grams of ammonia is needed to produce 150g of urea?
Correct
Incorrect

Question 50 of 65
50. Question
1 pointsThe dimensions of a glass window are: width = 2m , height = 1.2m and thickness= 7.5mm. The thermal conductivity of glass is 1.0W / m⋅K . The inner and outer surface temperatures of the glass window are 20ºC and 25ºC, respectively. The rate of heat loss from 2×12m windows is
Correct
Incorrect

Question 51 of 65
51. Question
1 pointsIf stream function of flow is ψ = 3xy, then the velocity at a point (2, 3) will be ______ (in units).
Correct
Incorrect

Question 52 of 65
52. Question
1 pointsThe outer diameter of an uninsulated steam pipe is 2cm. The outer surface temperature of the pipe is constant at 95° C , and the pipe is placed in a room where the surrounding temperature is constant at 25ºC. The emissivity of the pipe is 0.5 and the heat transfer coefficient for convection is 200 2 W/ m ²hºC. The total length of the pipe is 35m. Heat loss by convection from the pipe is
Correct
Incorrect

Question 53 of 65
53. Question
1 pointsCorrect
Incorrect

Question 54 of 65
54. Question
1 pointsCorrect
Incorrect

Question 55 of 65
55. Question
1 pointsCorrect
Incorrect

Question 56 of 65
56. Question
1 pointsCorrect
Incorrect

Question 57 of 65
57. Question
1 pointsCorrect
Incorrect

Question 58 of 65
58. Question
1 pointsCorrect
Incorrect

Question 59 of 65
59. Question
1 pointsCorrect
Incorrect

Question 60 of 65
60. Question
1 pointswhich of the following is/are used for recovering elemental sulfur from pyrite ores?
Correct
All of these
Incorrect
All of these

Question 61 of 65
61. Question
1 pointsCorrect
Incorrect

Question 62 of 65
62. Question
1 pointsCorrect
Incorrect

Question 63 of 65
63. Question
1 pointswhich of the following statement is correct?
Correct
The viscosity of gas increases with increase in temperature
Incorrect
The viscosity of gas increases with increase in temperature

Question 64 of 65
64. Question
1 pointsCorrect
Incorrect

Question 65 of 65
65. 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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