Chemical Engineering GATE 2023 Questions with Answer

Ques 40 Fluid Mechanics

A pump draws water (density = 1000 kg·m⁻³) at a steady rate of 10 kg·s⁻¹. The pressures at the suction and discharge sides of the pump are −20 kPa (gauge) and 350 kPa (gauge), respectively. The pipe diameters at the suction and discharge side are 70 mm and 50 mm, respectively. The suction and discharge lines are at the same elevation, and the pump operates at an efficiency of 80%. Neglecting frictional losses in the system, the power (in kW) required to drive the pump is ______ (rounded off to two decimal places).

Ques 41 Fluid Mechanics

A cylindrical tank with a diameter of 500 mm contains water (density = 1 g·cm⁻³) up to a height h. A 5 mm diameter round nozzle, whose center is 1 cm above the base of the tank, has its exit open to the atmosphere as shown in the schematic below. The pressure above the water level in the tank is maintained at 2 bar (absolute). Neglect all frictional and entry/exit losses. Use acceleration due to gravity as 10 m·s⁻² and atmospheric pressure as 1 bar. The absolute value of initial dh/dt (in mm·s⁻¹) when h = 51 cm is equal to ________ (rounded off to two decimal places).

Ques 42 Fluid Mechanics

A large tank is filled with water (density = 1 g·cm⁻³) up to a height of 5 m. A 100 μm diameter solid spherical particle (density = 0.8 g·cm⁻³) is released at the bottom of the tank. The particle attains its terminal velocity (v_t) after traveling to a certain height in the tank. Use acceleration due to gravity as 10 m·s⁻² and water viscosity as 10⁻³ Pa·s. Neglect wall effects on the particle. If Stokes' law is applicable, the absolute value of v_t (in mm·s⁻¹) is ____________ (rounded off to two decimal places).

Ques 43 General Aptitude

“You are delaying the completion of the task. Send _______ contributions at the earliest.”

Ques 44 General Aptitude

References : ______ : : Guidelines : Implement
(By word meaning)

Ques 45 General Aptitude

In the given figure, PQRS is a parallelogram with PS = 7 cm, PT = 4 cm and PV = 5 cm. What is the length of RS in cm? (The diagram is representative.)

Ques 46 General Aptitude

In 2022, June Huh was awarded the Fields medal, which is the highest prize in Mathematics. When he was younger, he was also a poet.
He did not win any medals in the International Mathematics Olympiads.
He dropped out of college. Based only on the above information, which one of the following statements can be logically inferred with certainty?

Ques 47 General Aptitude

A line of symmetry is defined as a line that divides a figure into two parts in a way such that each part is a mirror image of the other part about that line. The given figure consists of 16 unit squares arranged as shown. In addition to the three black squares, what is the minimum number of squares that must be coloured black, such that both PQ and MN form lines of symmetry? (The figure is representative)

Ques 48 General Aptitude

Human beings are one among many creatures that inhabit an imagined world. In this imagined world, some creatures are cruel. If in this imagined world, it is given that the statement “Some human beings are not cruel creatures” is FALSE, then which of the following set of statement(s) can be logically inferred with certainty?
(i) All human beings are cruel creatures.
(ii) Some human beings are cruel creatures.
(iii) Some creatures that are cruel are human beings.
(iv) No human beings are cruel creatures.

Ques 49 General Aptitude

To construct a wall, sand and cement are mixed in the ratio of 3:1. The cost of sand and that of cement are in the ratio of 1:2.
If the total cost of sand and cement to construct the wall is 1000 rupees, then what is the cost (in rupees) of cement used?

Ques 50 General Aptitude

The World Bank has declared that it does not plan to offer new financing to Sri Lanka, which is battling its worst economic crisis in decades, until the country has an adequate macroeconomic policy framework in place. In a statement, the World Bank said Sri Lanka needed to adopt structural reforms that focus on economic stabilisation and tackle the root causes of its crisis. The latter has starved it of foreign exchange and led to shortages of food, fuel, and medicines. The bank is repurposing resources under existing loans to help alleviate shortages of essential items such as medicine, cooking gas, fertiliser, meals for children, and cash for vulnerable households.
Based only on the above passage, which one of the following statements can be inferred with certainty?

Ques 51 General Aptitude

Which one of the following shapes can be used to tile (completely cover by repeating) a flat plane, extending to infinity in all directions, without leaving any empty spaces in between them? The copies of the shape used to tile are identical and are not allowed to overlap.

Ques 52 Heat Transfer

Match the quantities in Group 1 with their units in Group 2 listed in the table below.