Chemical Engineering - CH 2018 GATE Paper with solution GATE Notes | EduRev

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GATE : Chemical Engineering - CH 2018 GATE Paper with solution GATE Notes | EduRev

 Page 1


GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 1/2 
Q. 1 – Q. 5 carry one mark each. 
Q.1  “When she fell down the _______, she received many _______ but little help. ” 
 
The words that best fill the blanks in the above sentence are  
 
(A) stairs, stares (B) stairs, stairs 
(C) stares, stairs (D) stares, stares 
 
 
Q.2  “In spite of being warned repeatedly, he failed to correct his _________ behaviour. ” 
 
The word that best fills the blank in the above sentence is  
 
(A) rational (B) reasonable (C) errant (D) good 
 
 
Q.3  For 0 = ?? = 2 ?? , sin ?? and cos ?? are both decreasing functions in the interval ________. 
 
(A) ( 0 ,
?? 2
) (B) (
?? 2
, ?? ) (C) (?? ,
3 ?? 2
) (D) (
3 ?? 2
, 2 ?? ) 
 
 
Q.4  
The area of an equilateral triangle is v 3. What is the perimeter of the triangle? 
 
(A) 2 (B) 4 (C) 6 (D) 8 
 
 
Q.5  Arrange the following three-dimensional objects in the descending order of their volumes: 
(i)  A cuboid with dimensions 10 cm, 8 cm and 6 cm
 
 
(ii)  A cube of side 8 cm 
(iii)  A cylinder with base radius 7 cm and height 7 cm 
(iv)  A sphere of radius 7 cm 
 
(A) (i), (ii), (iii), (iv) 
(B) (ii), (i), (iv), (iii) 
(C) (iii), (ii), (i), (iv) 
(D) (iv), (iii), (ii), (i) 
 
 
 
Q. 6 – Q. 10 carry two marks each. 
 
Q.6  An automobile travels from city A to city B and returns to city A by the same route. The 
speed of the vehicle during the onward and return journeys were constant at 60 km/h and 
90 km/h, respectively. What is the average speed in km/h for the entire journey? 
 
(A) 72 (B) 73 (C) 74 (D) 75 
 
Page 2


GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 1/2 
Q. 1 – Q. 5 carry one mark each. 
Q.1  “When she fell down the _______, she received many _______ but little help. ” 
 
The words that best fill the blanks in the above sentence are  
 
(A) stairs, stares (B) stairs, stairs 
(C) stares, stairs (D) stares, stares 
 
 
Q.2  “In spite of being warned repeatedly, he failed to correct his _________ behaviour. ” 
 
The word that best fills the blank in the above sentence is  
 
(A) rational (B) reasonable (C) errant (D) good 
 
 
Q.3  For 0 = ?? = 2 ?? , sin ?? and cos ?? are both decreasing functions in the interval ________. 
 
(A) ( 0 ,
?? 2
) (B) (
?? 2
, ?? ) (C) (?? ,
3 ?? 2
) (D) (
3 ?? 2
, 2 ?? ) 
 
 
Q.4  
The area of an equilateral triangle is v 3. What is the perimeter of the triangle? 
 
(A) 2 (B) 4 (C) 6 (D) 8 
 
 
Q.5  Arrange the following three-dimensional objects in the descending order of their volumes: 
(i)  A cuboid with dimensions 10 cm, 8 cm and 6 cm
 
 
(ii)  A cube of side 8 cm 
(iii)  A cylinder with base radius 7 cm and height 7 cm 
(iv)  A sphere of radius 7 cm 
 
(A) (i), (ii), (iii), (iv) 
(B) (ii), (i), (iv), (iii) 
(C) (iii), (ii), (i), (iv) 
(D) (iv), (iii), (ii), (i) 
 
 
 
Q. 6 – Q. 10 carry two marks each. 
 
Q.6  An automobile travels from city A to city B and returns to city A by the same route. The 
speed of the vehicle during the onward and return journeys were constant at 60 km/h and 
90 km/h, respectively. What is the average speed in km/h for the entire journey? 
 
(A) 72 (B) 73 (C) 74 (D) 75 
 
GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 2/2 
Q.7  A set of 4 parallel lines intersect with another set of 5 parallel lines. How many 
parallelograms are formed? 
 
(A) 20 (B) 48 (C) 60 (D) 72 
 
 
Q.8  To pass a test, a candidate needs to answer at least 2 out of 3 questions correctly. A total of 
6,30,000 candidates appeared for the test. Question A was correctly answered by 3,30,000 
candidates. Question B was answered correctly by 2,50,000 candidates. Question C was 
answered correctly by 2,60,000 candidates. Both questions A and B were answered 
correctly by 1,00,000 candidates. Both questions B and C were answered correctly by 
90,000 candidates. Both questions A and C were answered correctly by 80,000 candidates. 
If the number of students answering all questions correctly is the same as the number 
answering none, how many candidates failed to clear the test? 
 
(A) 30,000 (B) 2,70,000 (C) 3,90,000 (D) 4,20,000 
 
 
Q.9  
If ?? 2
+ ?? - 1 = 0 what is the value of ?? 4
+
1
?? 4
? 
 
(A) 1 (B) 5 (C) 7 (D) 9 
 
 
Q.10  In a detailed study of annual crow births in India, it was found that there was relatively no 
growth during the period 2002 to 2004 and a sudden spike from 2004 to 2005. In another 
unrelated study, it was found that the revenue from cracker sales in India which remained 
fairly flat from 2002 to 2004, saw a sudden spike in 2005 before declining again in 2006. 
The solid line in the graph below refers to annual sale of crackers and the dashed line refers 
to the annual crow births in India. Choose the most appropriate inference from the above 
data. 
 
 
(A) There is a strong correlation between crow birth and cracker sales. 
(B) Cracker usage increases crow birth rate. 
(C) If cracker sale declines, crow birth will decline. 
(D) Increased birth rate of crows will cause an increase in the sale of crackers. 
 
END OF THE QUESTION PAPER 
 
Page 3


GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 1/2 
Q. 1 – Q. 5 carry one mark each. 
Q.1  “When she fell down the _______, she received many _______ but little help. ” 
 
The words that best fill the blanks in the above sentence are  
 
(A) stairs, stares (B) stairs, stairs 
(C) stares, stairs (D) stares, stares 
 
 
Q.2  “In spite of being warned repeatedly, he failed to correct his _________ behaviour. ” 
 
The word that best fills the blank in the above sentence is  
 
(A) rational (B) reasonable (C) errant (D) good 
 
 
Q.3  For 0 = ?? = 2 ?? , sin ?? and cos ?? are both decreasing functions in the interval ________. 
 
(A) ( 0 ,
?? 2
) (B) (
?? 2
, ?? ) (C) (?? ,
3 ?? 2
) (D) (
3 ?? 2
, 2 ?? ) 
 
 
Q.4  
The area of an equilateral triangle is v 3. What is the perimeter of the triangle? 
 
(A) 2 (B) 4 (C) 6 (D) 8 
 
 
Q.5  Arrange the following three-dimensional objects in the descending order of their volumes: 
(i)  A cuboid with dimensions 10 cm, 8 cm and 6 cm
 
 
(ii)  A cube of side 8 cm 
(iii)  A cylinder with base radius 7 cm and height 7 cm 
(iv)  A sphere of radius 7 cm 
 
(A) (i), (ii), (iii), (iv) 
(B) (ii), (i), (iv), (iii) 
(C) (iii), (ii), (i), (iv) 
(D) (iv), (iii), (ii), (i) 
 
 
 
Q. 6 – Q. 10 carry two marks each. 
 
Q.6  An automobile travels from city A to city B and returns to city A by the same route. The 
speed of the vehicle during the onward and return journeys were constant at 60 km/h and 
90 km/h, respectively. What is the average speed in km/h for the entire journey? 
 
(A) 72 (B) 73 (C) 74 (D) 75 
 
GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 2/2 
Q.7  A set of 4 parallel lines intersect with another set of 5 parallel lines. How many 
parallelograms are formed? 
 
(A) 20 (B) 48 (C) 60 (D) 72 
 
 
Q.8  To pass a test, a candidate needs to answer at least 2 out of 3 questions correctly. A total of 
6,30,000 candidates appeared for the test. Question A was correctly answered by 3,30,000 
candidates. Question B was answered correctly by 2,50,000 candidates. Question C was 
answered correctly by 2,60,000 candidates. Both questions A and B were answered 
correctly by 1,00,000 candidates. Both questions B and C were answered correctly by 
90,000 candidates. Both questions A and C were answered correctly by 80,000 candidates. 
If the number of students answering all questions correctly is the same as the number 
answering none, how many candidates failed to clear the test? 
 
(A) 30,000 (B) 2,70,000 (C) 3,90,000 (D) 4,20,000 
 
 
Q.9  
If ?? 2
+ ?? - 1 = 0 what is the value of ?? 4
+
1
?? 4
? 
 
(A) 1 (B) 5 (C) 7 (D) 9 
 
 
Q.10  In a detailed study of annual crow births in India, it was found that there was relatively no 
growth during the period 2002 to 2004 and a sudden spike from 2004 to 2005. In another 
unrelated study, it was found that the revenue from cracker sales in India which remained 
fairly flat from 2002 to 2004, saw a sudden spike in 2005 before declining again in 2006. 
The solid line in the graph below refers to annual sale of crackers and the dashed line refers 
to the annual crow births in India. Choose the most appropriate inference from the above 
data. 
 
 
(A) There is a strong correlation between crow birth and cracker sales. 
(B) Cracker usage increases crow birth rate. 
(C) If cracker sale declines, crow birth will decline. 
(D) Increased birth rate of crows will cause an increase in the sale of crackers. 
 
END OF THE QUESTION PAPER 
 
GATE 2018     CHEMICAL ENGINEERING 
CH 1/17 
Q. 1 – Q. 25 carry one mark each. 
 
 
Q.2  The fourth order Runge-Kutta (RK4) method to solve an ordinary differential equation 
( , )
dy
f x y
dx
? is given as 
? ?
? ?
1 2 3 4
1
1
2
2
3
43
1
( ) ( ) 2 2
6
( , )
,
22
,
22
,
y x h y x k k k k
k h f x y
k h
k h f x y
k h
k h f x y
k h f x h y k
? ? ? ? ? ?
?
??
? ? ?
??
??
??
? ? ?
??
??
? ? ?
 
 
For a special case when the function f depends solely on x, the above RK4 method reduces 
to 
 
(A) Euler’s explicit method (B) Trapezoidal rule 
 
(C) Euler’s implicit method (D) Simpson’s 1/3 rule 
 
 
Q.3  A watch uses two electronic circuits (ECs). Each EC has a failure probability of 0.1 in one 
year of operation. Both ECs are required for functioning of the watch. The probability of 
the watch functioning for one year without failure is  
 
 
(A) 0.99  (B) 0.90  (C) 0.81 (D) 0.80   
 
  
Q.1  
Consider the following two equations: 
0
0
dx
xy
dt
dy
x
dt
? ? ?
??
 
 
The above set of equations is represented by  
 
(A)
 
2
2
0
d y dy
y
dt dt
? ? ? (B)
 
2
2
0
d x dx
y
dt dt
? ? ?
 
 
(C)
 
2
2
0
d y dy
y
dt dt
? ? ? (D)
 
2
2
0
d x dx
y
dt dt
? ? ? 
Page 4


GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 1/2 
Q. 1 – Q. 5 carry one mark each. 
Q.1  “When she fell down the _______, she received many _______ but little help. ” 
 
The words that best fill the blanks in the above sentence are  
 
(A) stairs, stares (B) stairs, stairs 
(C) stares, stairs (D) stares, stares 
 
 
Q.2  “In spite of being warned repeatedly, he failed to correct his _________ behaviour. ” 
 
The word that best fills the blank in the above sentence is  
 
(A) rational (B) reasonable (C) errant (D) good 
 
 
Q.3  For 0 = ?? = 2 ?? , sin ?? and cos ?? are both decreasing functions in the interval ________. 
 
(A) ( 0 ,
?? 2
) (B) (
?? 2
, ?? ) (C) (?? ,
3 ?? 2
) (D) (
3 ?? 2
, 2 ?? ) 
 
 
Q.4  
The area of an equilateral triangle is v 3. What is the perimeter of the triangle? 
 
(A) 2 (B) 4 (C) 6 (D) 8 
 
 
Q.5  Arrange the following three-dimensional objects in the descending order of their volumes: 
(i)  A cuboid with dimensions 10 cm, 8 cm and 6 cm
 
 
(ii)  A cube of side 8 cm 
(iii)  A cylinder with base radius 7 cm and height 7 cm 
(iv)  A sphere of radius 7 cm 
 
(A) (i), (ii), (iii), (iv) 
(B) (ii), (i), (iv), (iii) 
(C) (iii), (ii), (i), (iv) 
(D) (iv), (iii), (ii), (i) 
 
 
 
Q. 6 – Q. 10 carry two marks each. 
 
Q.6  An automobile travels from city A to city B and returns to city A by the same route. The 
speed of the vehicle during the onward and return journeys were constant at 60 km/h and 
90 km/h, respectively. What is the average speed in km/h for the entire journey? 
 
(A) 72 (B) 73 (C) 74 (D) 75 
 
GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 2/2 
Q.7  A set of 4 parallel lines intersect with another set of 5 parallel lines. How many 
parallelograms are formed? 
 
(A) 20 (B) 48 (C) 60 (D) 72 
 
 
Q.8  To pass a test, a candidate needs to answer at least 2 out of 3 questions correctly. A total of 
6,30,000 candidates appeared for the test. Question A was correctly answered by 3,30,000 
candidates. Question B was answered correctly by 2,50,000 candidates. Question C was 
answered correctly by 2,60,000 candidates. Both questions A and B were answered 
correctly by 1,00,000 candidates. Both questions B and C were answered correctly by 
90,000 candidates. Both questions A and C were answered correctly by 80,000 candidates. 
If the number of students answering all questions correctly is the same as the number 
answering none, how many candidates failed to clear the test? 
 
(A) 30,000 (B) 2,70,000 (C) 3,90,000 (D) 4,20,000 
 
 
Q.9  
If ?? 2
+ ?? - 1 = 0 what is the value of ?? 4
+
1
?? 4
? 
 
(A) 1 (B) 5 (C) 7 (D) 9 
 
 
Q.10  In a detailed study of annual crow births in India, it was found that there was relatively no 
growth during the period 2002 to 2004 and a sudden spike from 2004 to 2005. In another 
unrelated study, it was found that the revenue from cracker sales in India which remained 
fairly flat from 2002 to 2004, saw a sudden spike in 2005 before declining again in 2006. 
The solid line in the graph below refers to annual sale of crackers and the dashed line refers 
to the annual crow births in India. Choose the most appropriate inference from the above 
data. 
 
 
(A) There is a strong correlation between crow birth and cracker sales. 
(B) Cracker usage increases crow birth rate. 
(C) If cracker sale declines, crow birth will decline. 
(D) Increased birth rate of crows will cause an increase in the sale of crackers. 
 
END OF THE QUESTION PAPER 
 
GATE 2018     CHEMICAL ENGINEERING 
CH 1/17 
Q. 1 – Q. 25 carry one mark each. 
 
 
Q.2  The fourth order Runge-Kutta (RK4) method to solve an ordinary differential equation 
( , )
dy
f x y
dx
? is given as 
? ?
? ?
1 2 3 4
1
1
2
2
3
43
1
( ) ( ) 2 2
6
( , )
,
22
,
22
,
y x h y x k k k k
k h f x y
k h
k h f x y
k h
k h f x y
k h f x h y k
? ? ? ? ? ?
?
??
? ? ?
??
??
??
? ? ?
??
??
? ? ?
 
 
For a special case when the function f depends solely on x, the above RK4 method reduces 
to 
 
(A) Euler’s explicit method (B) Trapezoidal rule 
 
(C) Euler’s implicit method (D) Simpson’s 1/3 rule 
 
 
Q.3  A watch uses two electronic circuits (ECs). Each EC has a failure probability of 0.1 in one 
year of operation. Both ECs are required for functioning of the watch. The probability of 
the watch functioning for one year without failure is  
 
 
(A) 0.99  (B) 0.90  (C) 0.81 (D) 0.80   
 
  
Q.1  
Consider the following two equations: 
0
0
dx
xy
dt
dy
x
dt
? ? ?
??
 
 
The above set of equations is represented by  
 
(A)
 
2
2
0
d y dy
y
dt dt
? ? ? (B)
 
2
2
0
d x dx
y
dt dt
? ? ?
 
 
(C)
 
2
2
0
d y dy
y
dt dt
? ? ? (D)
 
2
2
0
d x dx
y
dt dt
? ? ? 
GATE 2018     CHEMICAL ENGINEERING 
CH 2/17 
Q.4  
The figure which represents 
sin x
y
x
? for x > 0 (x in radians) is  
(A)  
 
 
(B) 
 
 
(C)  
  
 
(D) 
 
Page 5


GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 1/2 
Q. 1 – Q. 5 carry one mark each. 
Q.1  “When she fell down the _______, she received many _______ but little help. ” 
 
The words that best fill the blanks in the above sentence are  
 
(A) stairs, stares (B) stairs, stairs 
(C) stares, stairs (D) stares, stares 
 
 
Q.2  “In spite of being warned repeatedly, he failed to correct his _________ behaviour. ” 
 
The word that best fills the blank in the above sentence is  
 
(A) rational (B) reasonable (C) errant (D) good 
 
 
Q.3  For 0 = ?? = 2 ?? , sin ?? and cos ?? are both decreasing functions in the interval ________. 
 
(A) ( 0 ,
?? 2
) (B) (
?? 2
, ?? ) (C) (?? ,
3 ?? 2
) (D) (
3 ?? 2
, 2 ?? ) 
 
 
Q.4  
The area of an equilateral triangle is v 3. What is the perimeter of the triangle? 
 
(A) 2 (B) 4 (C) 6 (D) 8 
 
 
Q.5  Arrange the following three-dimensional objects in the descending order of their volumes: 
(i)  A cuboid with dimensions 10 cm, 8 cm and 6 cm
 
 
(ii)  A cube of side 8 cm 
(iii)  A cylinder with base radius 7 cm and height 7 cm 
(iv)  A sphere of radius 7 cm 
 
(A) (i), (ii), (iii), (iv) 
(B) (ii), (i), (iv), (iii) 
(C) (iii), (ii), (i), (iv) 
(D) (iv), (iii), (ii), (i) 
 
 
 
Q. 6 – Q. 10 carry two marks each. 
 
Q.6  An automobile travels from city A to city B and returns to city A by the same route. The 
speed of the vehicle during the onward and return journeys were constant at 60 km/h and 
90 km/h, respectively. What is the average speed in km/h for the entire journey? 
 
(A) 72 (B) 73 (C) 74 (D) 75 
 
GATE 2018                                                                                            General Aptitude (GA) Set-4  
GA 2/2 
Q.7  A set of 4 parallel lines intersect with another set of 5 parallel lines. How many 
parallelograms are formed? 
 
(A) 20 (B) 48 (C) 60 (D) 72 
 
 
Q.8  To pass a test, a candidate needs to answer at least 2 out of 3 questions correctly. A total of 
6,30,000 candidates appeared for the test. Question A was correctly answered by 3,30,000 
candidates. Question B was answered correctly by 2,50,000 candidates. Question C was 
answered correctly by 2,60,000 candidates. Both questions A and B were answered 
correctly by 1,00,000 candidates. Both questions B and C were answered correctly by 
90,000 candidates. Both questions A and C were answered correctly by 80,000 candidates. 
If the number of students answering all questions correctly is the same as the number 
answering none, how many candidates failed to clear the test? 
 
(A) 30,000 (B) 2,70,000 (C) 3,90,000 (D) 4,20,000 
 
 
Q.9  
If ?? 2
+ ?? - 1 = 0 what is the value of ?? 4
+
1
?? 4
? 
 
(A) 1 (B) 5 (C) 7 (D) 9 
 
 
Q.10  In a detailed study of annual crow births in India, it was found that there was relatively no 
growth during the period 2002 to 2004 and a sudden spike from 2004 to 2005. In another 
unrelated study, it was found that the revenue from cracker sales in India which remained 
fairly flat from 2002 to 2004, saw a sudden spike in 2005 before declining again in 2006. 
The solid line in the graph below refers to annual sale of crackers and the dashed line refers 
to the annual crow births in India. Choose the most appropriate inference from the above 
data. 
 
 
(A) There is a strong correlation between crow birth and cracker sales. 
(B) Cracker usage increases crow birth rate. 
(C) If cracker sale declines, crow birth will decline. 
(D) Increased birth rate of crows will cause an increase in the sale of crackers. 
 
END OF THE QUESTION PAPER 
 
GATE 2018     CHEMICAL ENGINEERING 
CH 1/17 
Q. 1 – Q. 25 carry one mark each. 
 
 
Q.2  The fourth order Runge-Kutta (RK4) method to solve an ordinary differential equation 
( , )
dy
f x y
dx
? is given as 
? ?
? ?
1 2 3 4
1
1
2
2
3
43
1
( ) ( ) 2 2
6
( , )
,
22
,
22
,
y x h y x k k k k
k h f x y
k h
k h f x y
k h
k h f x y
k h f x h y k
? ? ? ? ? ?
?
??
? ? ?
??
??
??
? ? ?
??
??
? ? ?
 
 
For a special case when the function f depends solely on x, the above RK4 method reduces 
to 
 
(A) Euler’s explicit method (B) Trapezoidal rule 
 
(C) Euler’s implicit method (D) Simpson’s 1/3 rule 
 
 
Q.3  A watch uses two electronic circuits (ECs). Each EC has a failure probability of 0.1 in one 
year of operation. Both ECs are required for functioning of the watch. The probability of 
the watch functioning for one year without failure is  
 
 
(A) 0.99  (B) 0.90  (C) 0.81 (D) 0.80   
 
  
Q.1  
Consider the following two equations: 
0
0
dx
xy
dt
dy
x
dt
? ? ?
??
 
 
The above set of equations is represented by  
 
(A)
 
2
2
0
d y dy
y
dt dt
? ? ? (B)
 
2
2
0
d x dx
y
dt dt
? ? ?
 
 
(C)
 
2
2
0
d y dy
y
dt dt
? ? ? (D)
 
2
2
0
d x dx
y
dt dt
? ? ? 
GATE 2018     CHEMICAL ENGINEERING 
CH 2/17 
Q.4  
The figure which represents 
sin x
y
x
? for x > 0 (x in radians) is  
(A)  
 
 
(B) 
 
 
(C)  
  
 
(D) 
 
GATE 2018     CHEMICAL ENGINEERING 
CH 3/17 
 
 
Q.5  The terminal velocity of a spherical particle in gravitational settling under Stokes’ regime 
varies 
(A) linearly with the particle diameter 
 
(B) linearly with the viscosity of the liquid 
 
(C) directly with the square of particle diameter 
 
(D) inversely with the density of particle 
 
 
Q.6  Critical speed of a ball mill depends on  
 
(A) the radius of the mill (shell) and the radius of the particles 
 
(B) the radius of the mill (shell) and the density of the particles 
 
(C) the radius of the balls and the radius of the particles 
 
(D) the radius of the balls and the radius of the mill (shell) 
 
 
Q.7  Economy of evaporators used for concentrating sugarcane juice is 
 
(A) 
kg of concentrated juice produced
kg of steam supplied
 
 
(B) 
kg of steam supplied 
kg of sugarcane juice fed
 
 
 
(C) 
kg of water vaporized  
kg of steam supplied 
 
 
 
(D) 
kg of sugarcane juice fed 
kg of  water vaporized
 
 
 
 
 
 
 
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