2491. Power required in case of forced draught as compared to induced draught (for the same draught produced) is
Same
Less
More
Either more or less; depends on the flue gas density
✅ The correct answer is option B.
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.
2492. Dampers are located
Before the I.D fan
After the I.fan
Near the top of the chimney
Anywhere after the I.fan
✅ The correct answer is option A.
2493. If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.
Premix
Outside mixing type
Rotary
Diffusion
✅ The correct answer is option A.
2494. An example of a periodic furnace is the
Blast furnace stoves
Blast furnace
Coke oven heating chamber
Rotary kilns
✅ The correct answer is option A.
2495. Indirect contact heat exchangers are preferred over direct contact heat exchangers, because
Heat transfer co-efficient are high
There is no risk of contamination
There is no mist formation
Cost of equipment is lower
✅ The correct answer is option B.
2496. In a forward feed multiple effect, the pressure build up will be
Least at the inlet of the first effect
Least at the outlet of the last effect
Highest at the inlet of the last effect
Highest at the outlet of the last effect
✅ The correct answer is option B.
2497. Crude oil is subjected to vacuum distillation in the last stage, because
high boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose.
lighter/low boiling products are prone to thermal decomposition.
high purity products can be obtained thereby.
none of these.
✅ The correct answer is option A.
2498. Road grade bitumen is produced from vacuum residue by its
aeration
pyrolysis
hydrogenation
steam reforming
✅ The correct answer is option D.
2499. __________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
Acid
Solvent extraction
Alkali
Clay
✅ The correct answer is option B.
2500. It is desired to concentrate a 20% salt solution (20 kg of salt in 100 kg of solution) to a 30% salt solution in an evaporator. Consider a feed of 300 kg/min at 30°C. The boiling point of the solution is 110°C, the latent heat of vaporisation is 2100 kJ/kg and the specific heat of the solution is 4 kJ/kg.K. The rate at which the heat has to be supplied in (kJ/min) to the evaporator is
3.06 x l0⁵
6.12 x 10⁵
7.24 x 10⁵
9.08 x 10⁵
✅ The correct answer is option A.