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.Management Sciences
Category: Mechanical Engineering Mcqs
Ferromagnetic alpha iron exists in temperature range of________________?
A. below 723°C
B. 770 – 910°C
C. 910-1440°C
D. 1400-1539°C
E. above 1539°C
A material is known as allotropic or polymorphic if it __________________?
A. has a fixed structure under all conditions
B. exists in several crystal forms at different temperatures
C. responds to heat treatment
D. has its atoms distributed in a random pattern
E. none of the above
Liquids_________________?
A. cannot be compressed
B. occupy definite volume
C. are not affected by change in pressure and temperature
D. are not viscous
E. none of the above
The flow which neglects changes in a transverse direction is known as_________________?
A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
E. streamline flow
If three forces acting in different planes can be represented by a triangle, these will be in________________?
A. non-equilibrium
B. partial equilibrium
C. full equilibrium
D. unpredictable
E. none of the above
Which of the following mechanism is obtained from lower pair________________?
A. gyroscope
B. pantograph
C. valve and valve gears
D. generated straight line motions
E. all of the above
Railway rails are normally made of_______________?
A. mild steel
B. alloy steel
C. high carbon
D. tungsten steel
E. cast iron steel
Reheating in gas turbine results in___________________?
A. increase of work ratio
B. decrease of thermal efficiency
C. decrease of work ratio
D. both A. and B. above
E. both B. and C. above
In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?
A. same level
B. slightly higher level
C. slightly lower level
D. may be anywhere
E. varies from situation to situation
If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as__________________?
A. free expansion
B. hyperbolic expansion
C. adiabatic expansion
D. parabolic expansion
E. throttling
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