Chemical Engineering Archives

Chemical Engineering

Prepare with the best Chemical Engineering MCQs with answers and detailed explanations for exams and job tests. Our collection covers key topics such as chemical process calculations, thermodynamics, fluid mechanics, heat transfer, mass transfer, reaction engineering, instrumentation, and plant design. These Chemical Engineering multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and job interviews. Practice online with updated Chemical Engineering MCQs to strengthen your concepts and improve technical problem-solving skills.

1461. In a shell and tube heat exchanger,

The temperature drops in the two fluids and the wall are proportional to individual resistances

The temperature drop is inversely proportional to the resistance across which the drop occurs

There is no relationship between temperature drop and resistance

The relationship is not generalised

✅ The correct answer is option A.

1462. Steam is routed through the tube in case of a __________ evaporator.

Basket type

Horizontal tube

Short tube vertical

Long tube vertical

✅ The correct answer is option B.

1463. In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator.

Increases

Decreases

Remains constant

May increase or decrease, depends on the vacuum

✅ The correct answer is option A.

1464. The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is

2.36

4.36

120.36

Dependent on NRe only

✅ The correct answer is option B.

1465. A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is

6000

24000

60000

48000

✅ The correct answer is option B.

1466. Steam trap is used to

Condense the steam flowing in the pipeline

Remove water resulting from partial condensation of steam

Stop the supply of steam

None of these

✅ The correct answer is option B.

1467. In a backward feed multiple effect evaporator

Feed is introduced in the first effect

Feed flows from low pressure to high pressure

No pumps are required between successive effects

None of these

✅ The correct answer is option B.

1468. The Grashoff number is defined as the ratio of the

Buoyancy to inertial forces

Buoyancy to viscous forces

Inertial to viscous forces

Buoyancy to surface tension forces

✅ The correct answer is option B.

1469. Electromagnetic radiations propagate in vacuum with a velocity of __________ metre/second.

3 x l05

3 x l08

3 x l010

3 x l012

✅ The correct answer is option B.

1470. Heat produced when a steady state current, I passes through an electrical conductor having resistance, ‘R’ is

I²R

IR²

I²R²

✅ The correct answer is option B.