Chemical Engineering Gate Yearwise 


Chemical Engineering Gate 2017 Questions with Answer

Ques 27 GATE 2017

The following table provides four sets of Fanning friction factor data, for different values of Reynolds number (Re) and roughness factor k/D. Which of the above sets of friction factor data is correct?

Set f Re = 102 Re = 103 Re = 105
k/D = 0 k/D = 0.001 k/D = 0 k/D = 0.001
Set I f 0.16 0.016 16×10−5 16×10−5
Set II f 0.016 0.16 0.0055 0.0045
Set III f 0.16 0.016 0.0045 0.0055
Set IV f 0.0045 0.0055 0.016 0.16

A

(A) Set I

B

(B) Set II

C

(C) Set III

D

(D) Set IV


(c) is the correct answer.

Ques 28 GATE 2017

A propeller (diameter D = 15 m) rotates at N = 1 revolution per second (rps). To understand the flow around the propeller, a lab-scale model is made. Important parameters to study the flow are velocity of the propeller tip (V = πND), diameter D and acceleration due to gravity (g). The lab-scale model is 1/100th of the size of the actual propeller. The rotation speed of the lab-scale model, to the nearest integer, should be


(10) is the correct answer.

Ques 29 GATE 2017

The bacteria in milk are destroyed when it ________ is heated to 80 degree Celsius.

A

(A) would be

B

(B) will be

C

(C) is

D

(D) was


(c) is the correct answer.

Ques 30 GATE 2017

________ with someone else’s email account is now a very serious offence.

A

(A) Involving

B

(B) Assisting

C

(C) Tampering

D

(D) Incubating


(c) is the correct answer.

Ques 31 GATE 2017

All benches are beds. No bed is a bulb. Some bulbs are lamps. Which of the following can be inferred? i. Some beds are lamps. ii. Some lamps are beds.

A

(A) Only i

B

(B) Only ii

C

(C) Both i and ii

D

(D) Neither i nor ii


(d) is the correct answer.

Ques 32 GATE 2017

If the radius of a right circular cone is increased by 50%, its volume increases by

A

(A) 75%

B

(B) 100%

C

(C) 125%

D

(D) 237.5%


(c) is the correct answer.

Ques 33 GATE 2017

The following sequence of numbers is arranged in increasing order: 1, x, x, x, y, y, 9,16,18. Given that the mean and median are equal, and are also equal to twice the mode, the value of y is

A

(A) 5

B

(B) 6

C

(C) 7

D

(D) 8


(d) is the correct answer.

Ques 34 GATE 2017

The old concert hall was demolished because of fears that the foundation would be affected by the construction of the new metro line in the area. Modern technology for underground metro construction tried to mitigate the impact of pressurized air pockets created by the excavation of large amounts of soil. But even with these safeguards, it was feared that the soil below the concert hall would not be stable. From this, one can infer that

A

(A) the foundations of old buildings create pressurized air pockets underground, which are difficult to handle during metro construction.

B

(B) metro construction has to be done carefully considering its impact on the foundations of existing buildings.

C

(C) old buildings in an area form an impossible hurdle to metro construction in that area.

D

(D) pressurized air can be used to excavate large amounts of soil from underground areas.


(b) is the correct answer.

Ques 35 GATE 2017

Students applying for hostel rooms are allotted rooms in order of seniority. Students already staying in a room will move if they get a room in their preferred list. Preferences of lower ranked applicants are ignored during allocation. Given the data below, which room will Ajit stay in?

A

(A) P

B

(B) Q

C

(C) R

D

(D) S


(b) is the correct answer.

Ques 36 GATE 2017

The last digit of (2171)7 + (2172)9 + (2173)11 + (2174)13 is

A

(A) 2

B

(B) 4

C

(C) 6

D

(D) 8


(b) is the correct answer.

Ques 37 GATE 2017

Two machines M1 and M2 are able to execute any of four jobs P, Q, R and S. The machines can perform one job on one object at a time. Jobs P, Q, R and S take 30 minutes, 20 minutes, 60 minutes and 15 minutes each respectively. There are 10 objects each requiring exactly 1 job. Job P is to be performed on 2 objects, Job Q on 3 objects, Job R on 1 object and Job S on 4 objects. What is the minimum time needed to complete all the jobs?

A

(A) 2 hours

B

(B) 2.5 hours

C

(C) 3 hours

D

(D) 3.5 hours


(a) is the correct answer.

Ques 38 GATE 2017

The bar graph below shows the output of five carpenters over one month, each of whom made different items of furniture: chairs, tables, and beds.

Consider the following statements.
i. The number of beds made by carpenter C2 is exactly the same as the number of tables made by carpenter C3.
ii. The total number of chairs made by all carpenters is less than the total number of tables.
Which one of the following is true?

A

(A) Only i

B

(B) Only ii

C

(C) Both i and ii

D

(D) Neither i nor ii


(c) is the correct answer.

Ques 39 GATE 2017

The one-dimensional unsteady heat conduction equation is
∂T/∂t = (1/(ρCp)) ∂/∂r (rn k ∂T/∂r)
where T- temperature, t - time, r - radial position, k - thermal conductivity, ρ - density, and Cp - specific heat. For the cylindrical coordinate system, the value of n in the above equation is

A

(A) 0

B

(B) 1

C

(C) 2

D

(D) 3


(b) is the correct answer.

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