Tuesday, October 30, 2018

MECHANICAL ENGINEERING MCQ SECTION 36


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 

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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