Related Questions

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
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
A $$\frac{\tau }{2}$$
B $$\tau $$
C $$2\tau $$
D $$4\tau $$
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
If the time required for half change is inversely proportional to the square of initial concentration and the velocity depends on the units in which the concentration term is expressed, then the order of reaction is
A 1
B 2
C 3
D 0
Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.
A Proportional to
B Independent of
C Inversely proportional to
D Proportional to the square of
In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the
A Solute concentration
B Temperature
C Both A & B
D Neither A nor B
The value of diagram factor depends upon
A Initial conditions of steam
B Back pressure
C Initial pressure of steam
D All of these
The value of fouling factor depends upon the
A Characteristic of process fluid
B Velocity of process fluid containing suspended solids
C Suspended solids in the fluid
D All of the above
The reheat factor depends upon
A Initial pressure and superheat
B Exit pressure
C Turbine stage efficiency
D All of these
jH factor for heat transfer depends upon the __________ number.
A Biot
B Nusselt
C Reynolds
D Prandtl

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