Web crippling occurs due to
A.column action of the web
B.failure of web under concentrated load
C.excessive bending moment
D.secondary stresses
Category: Engineeeing Mcqs
The operating pressure drop for the electrostatic precipitator including perforated plates varies in the range of
A.0.2 to 0.5 in. H2O g
B.3 to 60 in. H2O g
C.2 to 6 in. H2O g
D.0.01 to 0.1 in. H2O g
Some engineering materials are made up of more than one phase, with different mechanical properties, such materials are known as
A.Discontinuous
B.Brittle
C.Plastic
D.Heterogeneous
E.None of the above
All of these form explosive dust except
A.Soyabean flour
B.Starch
C.Sulphur
D.Pulverized Mica
Which one of the following substances is used as a nitrogenous fertilizer as a weed killer in the onion fields and for correcting acidic soils?
A.Urea
B.Basic slag
C.Superphosphate of lime
D.Calcium cyanamide
The electrostatic precipitators have an efficiency characteristic which is related primarily to exposure time i.e. the period during which a dust particle is exposed to the electrostatic field. Exposure time can be increased by
A.increasing the cross-sectional area of the precipitator
B.increasing its length in the direction of gas flow
C.both a and b
D.neither a nor b
The wavelength for maximum emissive power is given by
A.Planck’s law
B.Fourier’s law
C.Wein’s law
D.Stefan Boltzman’s law
E.Kirchhoff’s law
Which of the following aluminium alloy is commonly used for utensils?
A.Y-alloy
B.Duralumin
C.Magnalium
D.Babbit alloy
E.Hindalium
In case clutch is to be introduced in the drive for belt conveyor, which clutch will be preferred?
A.Dog clutch
B.Spring loaded clutch
C.Hydraulic clutch
D.Any of the above
Balanced draft incorporates
A.Forced draft
B.Induced draft
C.Forced and induced draft
D.Chimney draft only
