Chemical Engineering GATE 2025 Questions with Answer

Ques 27 Fluid Mechanics

An adiabatic pump of efficiency 40% is used to increase the water pressure from 200 kPa to 600 kPa. The flow rate of water is 600 L/min. The specific heat of water is 4.2 kJ/(kg°C). Assuming water is incompressible with a density of 1000 kg/m³, the maximum temperature rise of water across the pump is ______ °C (rounded off to 3 decimal places).

Ques 28 General Aptitude

Is there any good show _______ television tonight?
Select the most appropriate option to complete the above sentence.

Ques 29 General Aptitude

As the police officer was found guilty of embezzlement, he was _______ dismissed from the service in accordance with the Service Rules.
Select the most appropriate option to complete the above sentence.

Ques 30 General Aptitude

The sum of the following infinite series is:
1/1! + 1/2! + 1/3! + 1/4! + 1/5! + ···

Ques 31 General Aptitude

A thin wire is used to construct all the edges of a cube of 1 m side by bending, cutting and soldering the wire. If the wire is 12 m long, what is the minimum number of cuts required to construct the wire frame to form the cube?

Ques 32 General Aptitude

The figures I, II and III are parts of a sequence. Which one of the following options comes next in the sequence at IV?

A

B

C

D

Ques 33 General Aptitude

“Why do they pull down and do away with crooked streets, I wonder, which are my delight, and hurt no man living? Every day the wealthier nations are pulling down one or another in their capitals and their great towns: they do not know why they do it; neither do I. It ought to be enough, surely, to drive the great broad ways which commerce needs and which are the life-channels of a modern city, without destroying all history and all the humanity in between: the islands of the past.” (From Hilaire Belloc’s “The Crooked Streets”)
Based only on the information provided in the above passage, which one of the following statements is true

Ques 34 General Aptitude

Rohit goes to a restaurant for lunch at about 1 PM. When he enters the restaurant, he notices that the hour and minute hands on the wall clock are exactly coinciding. After about an hour, when he leaves the restaurant, he notices that the clock hands are again exactly coinciding. How much time (in minutes) did Rohit spend at the restaurant?

Ques 35 General Aptitude

A color model is shown in the figure with color codes: Yellow (Y), Magenta (M), Cyan (Cy), Red (R), Blue (Bl), Green (G), and Black (K).
Which one of the following options displays the color codes that are consistent with the color model?

A

B

C

D

Ques 36 General Aptitude

A circle with center at (x,y)=(0.5,0) and radius =0.5 intersects with another circle with center at (x,y)=(1,1) and radius =1 at two points. One of the points of intersection (x,y) is:

Ques 37 General Aptitude

An object is said to have an n-fold rotational symmetry if the object, rotated by an angle of 2π/n, is identical to the original.
Which one of the following objects exhibits 4-fold rotational symmetry about an axis perpendicular to the plane of the screen?
Note: The figures shown are representative.

A

B

C

D

Ques 38 Heat Transfer

In industrial heat exchanger design, the overall heat transfer coefficient U is estimated from the equation 1/U = 1/h_i + 1/h_o, where h_i and h_o are the convective heat transfer coefficients on the inner and outer side of the tube, respectively. This is valid for (i) tube of (ii) thermal conductivity.
Which one of the following is the CORRECT option to fill in the gaps (i) and (ii)?

Ques 39 Heat Transfer

A hot plate is placed in contact with a cold plate of a different thermal conductivity as shown in the figure. The initial temperature (at time t=0) of the hot plate and cold plate are T_h and T_c, respectively. Assume perfect contact between the plates.