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.Management Sciences
Category: Mechanical Engineering Mcqs
The property of a material which enables it to resist fracture due to high impact loads is known as__________________?
A. elasticity
B. endurance
C. strength
D. toughness
E. resilience
In a naturally aspirated diesel engine, the air is supplied by________________?
A. a supercharger
B. a centrifugal blower
C. a vacuum chamber
D. an injection tube
E. forced chamber
The unit of overall coefficient of heat transfer is___________________?
A. kcal/m2
B. kcal/hr °C
C. kcal/m2 hr °C
D. kacl/m hr °C
E. kcal/m3 hr °C
Gradually varied flow is__________________?
A. steady uniform
B. non-steady non-uniform
C. non-steady uniform
D. steady non-uniform
E. true one-dimensional
Turbofan engine employs ____________________ ?
A. one air stream
B. two or more air streams
C. no air stream
D. solid fuel firing
E. rocket principle for its operation
Francis, Kaplan and propeller turbines fall under the category of___________________?
A. Impulse turbines
B. Reaction turbines
C. Axial flow turbines
D. Mixed flow turbines
E. Reaction-cum-impulse turbines
In air breathing jet engine, the jet is formed by expanding__________________?
A. gases
B. solids
C. liquid
D. plasma
E. highly heated atmospheric air
Engine pistons ‘are usually made of aluminium alloy because it_________________?
A. is lighter
B. wears less
C. absorbs shocks
D. is stronger
E. does not react with fuel and lub oil
Transverse fillet welded joints are designed for________________?
A. tensile strength
B. compressive strength
C. shear strength
D. bending strength
E. torsional strength
The efficiency of a Carnot engine depends on_______________________?
A. working substance
B. design of engine
C. size of engine
D. type of fuel fired
E. temperatures of source and sink
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