> 0.75
< 0.75
< 0.50
< 0.25
✅ The correct answer is option B.
Engineering
Boost your preparation with the latest Engineering MCQs with answers and explanations. Our collection covers civil engineering, electrical engineering, mechanical engineering, electronics, software engineering, and other core subjects. These multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, PEC exams, university entry tests, and job interviews. Practice online with updated Engineering MCQs to strengthen concepts, improve technical knowledge, and perform better in exams and recruitment tests.
2462. The function of an economiser in a boiler is to preheat the
Feedwater
Combustion air
Pulverised coal
Furnace oil
✅ The correct answer is option A.
2463. In reverberatory furnace, charge is heated mainly by
Conduction
Natural convection
Radiation of heat from the roof of the combustion chamber
None of these
✅ The correct answer is option C.
2464. Pot furnace which is either regenerative or recupterative, is used in the manufacture of
Glass
Stainless steel
Potteries
Refractory bricks
✅ The correct answer is option A.
2465. Circulation of gases in furnace is caused by the
Change in volume during a change of temperature
Difference in density between hot and cold gases
Furnace pressure in conjunction with draft in flues
All of the above
✅ The correct answer is option D.
2466. Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid?
Bleed point
Vent
Catchall
Baffle
✅ The correct answer is option C.
2467. Air filtration in a furnace
Reduces its thermal efficiency
Is indicated by flame sting out
Increases the flue gas temperature
None of these
✅ The correct answer is option A.
2468. Which characteristic of a fluid is not important in deciding its route in a shell and tube heat exchanger?
Corrosiveness
Fouling characteristic
Viscosity
None of these
✅ The correct answer is option D.
2469. Hearth furnaces are not used for
Roasting
Melting
Reheating
None of these
✅ The correct answer is option D.
2470. Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of
Graphite powder
Thoria
Zircon powder
Beryllium
✅ The correct answer is option C.