Permeability of sand decreases as
A.permeability increases
B.moisture content increases
C.bonding content increases
D.all of the above
Category: Mechanical Engineering Mcqs
Carburizing is done
A.On steel with carbon percentage of 0.7%
B.On steels with carbon percentage of 0.5%
C.To improve hardenability of steel
D.By heating 200?C below critical temperature
E.To induce soft surface for machining on a hard core
Mercury is generally used in barometer because
A.Of higher density due to which the height of barmeter will be small
B.It has practically zero vapour pressure
C.It shines and can be easily read
D.It does not stick to the tube walls
E.All above
The process of passing the water through a thick layer of filtering media is known as
A.Sedimentation
B.Filtration
C.Disinfection
D.Purification
E.Putrification
The relation of the vapour pressure to the enthalpy of vaporization is expressed in
A.Energy equation
B.Van der Waal’s equation
C.Gas equation
D.Maxwell’s equation
E.Clausius Clapeyron equation
Two forces of 6 and 8 kg act at right angles to each other, the resultant force will be
A.10
B.28
C.41
D.14
E.100
A monopolist makes maximum profits when
A.Prices are high
B.Production is maximum
C.Marginal cost is equal to marginal revenue
D.Sales are high
E.Buyers buy less
Blow holes in castings are due to
A.high moisture content of the sand
B.low permeability of sand
C.excessive fine grains and gas producing ingredients
D.any of the above
Spring steels should have high resistance to
A.Shocks
B.Fatigue
C.Corrosion
D.Deformation
E.All of the above
The specific heat of a perfect gas is a function of
A.temperature only
B.temperature and pressure only
C.temperature and entropy only
D.temperature, pressure and entropy only
