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.Management Sciences
Category: Mechanical Engineering Mcqs
Annealing of white cast iron results in production of_________________?
A. malleable iron
B. nodular iron
C. spheroidal iron
D. grey iron
E. none of the above
The stress necessary to initiate yielding is_________________?
A. considerably greater than that necessary to continue it
B. considerably lesser than that necessary to continue it
C. greater than that necessary to stop it
D. lesser than that necessary to stop it
E. equal to that necessary to stop it
A self locking screw has________________>
A. fine threads
B. coarse threads
C. coefficient of friction > tangent of load angle
D. hole for inserting split pin
E. two nuts for locking
The weakest section of a diamond riveting is the section which passes through ___________________?
A. the first row
B. the second row
C. the central row
D. one rivet hole of the end row
E. none of the above
For same compression ratio and for same heat added_________________?
A. Otto cycle is more efficient than Diesel cycle
B. Diesel cycle is more efficient than Otto cycle
C. efficiency depends on other factors
D. both Otto and Diesel cycles are equally efficient
E. none of the above
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process ________________?
A. involves no change in volume
B. takes place at constant temperature
C. takes place at constant entropy
D. takes place at constant enthalpy
E. takes place at constant pressure
In regenerative air preheater, the heat is transferred _____________________?
A. from a metal wall from one medium to another
B. from heating an intermediateanaterial and then heating the air from this material
C. by direct mixing
D. heat is transferred by bleeding some gas from furnace
E. none of the above
The dry saturated steam at very high pressure (150-200 kg/cm2) when throttled to atmosphere will become_______________?
A. wet
B. superheated
C. remain dry saturated
D. dry
E. none of the above
Reversed joule cycle is called_________________?
A. Carnot cycle
B. Rankine cycle
C. Brayton cycle
D. Bell Coleman cycle
E. Dual cycle
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