3551. The damper in a steam boiler is provided to control the draught (i.e. rate of flow of air) and thus regulate the rate of generation of steam.
Correct
Incorrect
✅ The correct answer is option A.
Mechanical Engineering
Prepare with the best Mechanical Engineering MCQs with answers and explanations for exams, interviews, and job tests. Our collection covers core topics such as engineering mechanics, thermodynamics, strength of materials, theory of machines, fluid mechanics, heat transfer, manufacturing processes, machine design, and power plant engineering. These Mechanical Engineering multiple-choice questions are designed for students, fresh graduates, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your technical knowledge and problem-solving ability with our updated and comprehensive Mechanical Engineering MCQs.
3552. Which of the following are boiler accessories ?
economiser
superheater
both (a) and (b)
none of these
✅ The correct answer is option C.
3553. The reduced ambient air cooling system has
one cooling turbine and one heat exchanger
one cooling turbine and two heat exchangers
two cooling turbines and one heat exchanger
two cooling turbines a
✅ The correct answer is option C.
3554. A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as
superheater
air preheater
economiser
injector
✅ The correct answer is option B.
3555. Sensitiveness of the governor is defined as the ratio of the
mean speed to the maximum equilibrium speed
mean speed to the minimum equilibrium speed
difference of the maximum and minimum equilibrium speeds to the mean speed
sum of the maximum and
✅ The correct answer is option C.
3556. The gross or total head of the turbine is the __________ of the water levels at the head race and tail race.
sum
difference
product
✅ The correct answer is option B.
3557. The internal flue tubes of a Lancashire boiler are reduced in diameter at the back to provide access to the lower part of the boiler.
TRUE
FALSE
✅ The correct answer is option A.
3558. A Kaplan turbine is an axial flow reaction turbine.
Correct
Incorrect
✅ The correct answer is option A.
3559. The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle.
TRUE
FALSE
✅ The correct answer is option B.
3560. The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as
Wien’s law
Stefan’s law
Kirchhoff’s law
Planck’s law
✅ The correct answer is option C.