811. A flow through an expanding tube at constant rate is called
steady uniform flow
steady non-uniform flow
unsteady uniform flow
unsteady non-uniform f
✅ The correct answer is option B.
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.
812. In acidic bessemer process, the furnace is lined with
silica bricks
a mixture of tar and burnt dolomite bricks
either (a) or (b)
none of these
✅ The correct answer is option A.
813. The service brakes employed in cars are generally operated
mechanically
hydraulically
pneumatically
none of these
✅ The correct answer is option B.
814. Which of the following refrigerant is highly toxic and flammable?
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
✅ The correct answer is option A.
815. The timing belt is attached to the camshaft pulley and
timing belt drive pulley
distributor
radiator fan pulley
alternator pulley
✅ The correct answer is option A.
816. The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)
sin α =
cos α =
tan α =
cot α =
✅ The correct answer is option C.
817. The law of the machine is(where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)
P = mW – C
P = m/W + C
P = mW + C
P = C – mW
✅ The correct answer is option C.
818. P.M.T.S. (Predetermined Motion Time Systems) include
M.T.M. (Method Time Measurement)
W.F.S. (Work Factor Systems)
B.M.T.S. (Basic Motion Time Study)
all of these
✅ The correct answer is option D.
819. In the below figure, Hook’s law holds good, for the portion from O to A.
Agree
Disagree
✅ The correct answer is option A.
820. A maintenance free battery
has lead-antimony plate grid
has lead-calcium plate grid
does not contain acid
does not contain water
✅ The correct answer is option B.