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.Management Sciences
Category: Mechanical Engineering Mcqs
The value of the wavelength for maximum emissive power is given by ___________________?
A. Wien’s law
B. Planck’s law
C. Stefan’s law
D. Fourier’s law
E. Kirchhoff’s law
A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to___________________?
A. 25
B. 50
C. 100
D. 250
E. 500
Each fission of U235 produces following number of fast neutrons per fission________________?
A. 1 neutron
B. 1 — neutrons
C. 1 – 2 neutrons
D. 2 — neutrons
E. infinite
Pick up the wrong statement?
A. In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator.
B. Slow or thermal neutrons have energy of the order or 0.025 eV
C. Fast neutrons have energies above 1000 eV
D. Fast reactor uses moderator
E. Most serious drawback in using water as coolant in nuclear plants is its high vapour pressure
The value of modulus of elasticity for mild steel is of the order of________________?
A. 2.1xl05 kg/cm2
B. 2.1 X 106 kg/cm2
C. 2.1 x 107 kg/cm2
D. 0.1 xlO6 kg/cm2 (<?) 3.8 x 106 kg/cm2
In nitrated parts, the origins of the fatigue cracks will occur at__________________?
A. surface
B. just below the surface
C. within the core
D. could occur anywhere
E. none of the above
A specimen of aluminium metal when observed under microscope shows __________________?
A. B.C.C. crystalline structure
B. F.C.C. crystal structure
C. H.C.P. structure
D. a complex cubic structure
E. orthorhombic crystalline structure
In jet engines the compression ratio__________________?
A. varies as square root of the speed
B. Varies linearly to the speed
C. varies as square of the speed
D. varies as cube of the speed
E. is constant irrespective of variation in speed
Stirling and Ericsson cycles are__________________?
A. reversible cycles
B. irreversible cycles
C. quasi-static cycles
D. semi-reversible cycles
E. adiabatic irreversible cycles
Depth of hardness of steel is increased by addition of_________________?
A. nickel
B. chromium
C. tungsten
D. vanadium
E. ell of the above
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