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.Management Sciences
Category: Mechanical Engineering Mcqs
In multi-V-belt transmission, if one of the belt is broken, we have to change the_________________?
A. broken belt
B. broken belt and its adjacent belts
C. all the belts
D. there is no need of changing any one as remaining belts can take care of transmission of load
E. all the weak belts
An ideal regenerative cycle is ______________________?
A. equal to carnot cycle
B. less than carnot cycle
C. more than carnot cycle
D. could be anything
E. none of the above
Brayton cycle consists’ of following four processes____________________?
A. two isothermals and two isentropics
B. two isentropics and two constant volumes
C. two isentropics, one constant volume and one constant pressure
D. two isentropics and two constant pres-sures
E. none of the above
The maximum propulsion efficiency of a turbojet is attained at around following speed __________________?
A. 550 km/hr
B. 1050km/hr
C. 1700 km/hr
D. 2400km /hr
E. 4000 km/hr
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that___________________?
A. carnot cycle can’t work with saturated steam
B. heat is supplied to water at temperature below the maximum temperature of the cycle
C. a rankine cycle receives heat at two places
D. rankine cycle is hypothetical
E. none of the above
Rectilinear motion of piston is converted into rotary by_______________?
A. cross head
B. slider crank
C. connecting rod
D. gudgeon pin
E. four bar chain mechanism
The relative coefficient of performance is_____________________?
A. actual COP/fheoretical COP
B. theoretical COP/actual COP
C. actual COP x theoretical COP
D. 1-actual COP x theoretical COP
E. 1-actual COP/fheoretical COP.
The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________?
A. same
B. more
C. less
D. more or less depending on other factors
E. unpredictable
Entropy change depends on___________________?
A. heat transfer
B. mass transfer
C. change of temperature
D. thermodynamic state
E. change of pressure and volume
The main disadvantage of the sliding pair is that it is_________________?
A. bulky
B. wears rapidly
C. difficult to manufacture
D. A. and B. above
E. A. and C. above
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