Which of the following is the major source of flyash emission?
A.Sintering plants
B.Oil refineries
C.Blast furnace
D.Power plants
E.Sulphuric acid plant
Category: Engineeeing Mcqs
Flux used in cupola while melting cast iron is
A.lime stone
B.coke slurry
C.molasses
D.any of the above
The ratio inertia forces/surface tension force gives a non-dimensional number known as
A.Weber number
B.Shround number
C.Cauchy number
D.Euler number
E.Froude number
Falling drops of water become spherical due to
A.Adhesion
B.Cohesion
C.Dynamic viscosity
D.Kinematic viscosity
E.Surface tension
With in the range of _______ of oxygen in the flue gas the combustion has enough excess air to minimize incomplete combustion and not to much excess air to cause excessive dry-gas or stack loss
A.15 to 20%
B.2.5 to 3.5%
C.15 to 30%
D.10 to 30%
The average value of thermal conductivity for water at 20?C is about
A.0.13
B.0.32
C.0.51
D.None of the above
Hydraulic jump is used for
A.Increasing the flow rate
B.Reducing the flow rate
C.Reducing the velocity of flow
D.Reducing the energy of flow
E.Reducing turbulence
Which one of the following is not the law of dry friction?
A.If friction is neglected, the reactions are always normal to the surfaces on contact
B.Friction always acts to oppose the relative motion of the free body
C.If static friction is acting, the value of the friction force may vary from zero to its maximum value
D.The force of friction is always normal to the surface
E.All of the above
The decibel is
A.Unit of noise level
B.A logarithmic ratio between a measured quantity and a reference quantity
C.Quantity of noise per unit area
D.A logarithmic ratio between a measured quantity and 100
E.None of the above
