MECHANICAL ENGINEERING MCQ SECTION 36
351. Mandrels are used to hold
(A) Drill Bits
(B) Hollow Work Pieces
(C) Cutting Tools
(D) Face Plate
Answer: -Hollow Work Pieces
352. Brasses and bronze are welded using
(A) Neutral Flame
(B) Carburizing Flame
(C) Reducing Flame
(D) Oxidizing Flame
Answer: -Oxidizing Flame
ONE LINER MCQ
ONE LINER MCQ
353. Which law states that the specific heat
of a gas remains constant at all temperatures and pressures
Regnault’s Law
354. Isochoric process is one in which
no mechanical work is done by the system
355. Da-laval turbines are mostly used________
For small power purposes and and high speeds
356. The degree of reaction is defined as the ratio___________
Heat drop in the moving blades to the total heat drop in the fixed blades
357. The maximum efficiency of a Da-Lavel turbine is (where α= nozzle angle) ........
Cos2α
358.The ratio of isentropic heat drop to the heat supplied is called........
Rankine efficiency
359.There is enthalpy drop only in_______ in case of an impulse steam turbine
Fixed blades
360.The efficiency of steam turbine may be improved by........
Reheating of steam
Regenerative feed heating
Binary vapour plants
Any of the above
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