Related Questions

If a material expands freely due to heating it will develop
A Thermal stresses
B Tensile stress
C Bending
D No stress
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.
A Working
B Damaging
C Allowable
D None of these
In heating the ferromagnetic material by induction heating, heat is produced due to
A Induced current flow through the charge
B Hysteresis loss taking place below Curie temperature
C Due to hysteresis loss as well as eddy current loss taking place in the charge
D None of the above factors
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
A 0.5
B 2
C $$\sqrt 2 $$
D $$\sqrt {\frac{3}{2}} $$
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be
A Same in both cases
B 2 times more
C 3 times more
D 4 times more
Gross heating value of coal is __________ the net heating value.
A Higher than
B Lower than
C Same as
D None of these
When a body is subjected to a direct tensile stress (σ) in one plane, the maximum shear stress is __________ the maximum normal stress.
A Equal to
B One-half
C Two-third
D Twice
Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.
A Isothermal
B Adiabatic
C Isentropic
D None of these
Heating wet steam at constant temperature is heating it at constant
A Volume
B Pressure
C Entropy
D Enthalpy
In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating
A Decreases with increase in Rankine cycle efficiency
B Increases with increase in Rankine cycle efficiency
C Is unaffected by increase in Rankine cycle efficiency
D None of the above

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