Annealing of aluminium castings
A.reduces tensile strength
B.improves ductility
C.relieves micro stresses
D.mechanical properties change
Category: Mechanical Engineering Mcqs
The calorific value of which of the following files is expected to be nearly equal?
A.Coal gas and lignite coal
B.Natural gas and coal gas
C.Anthracite coal and lignite
D.Petrol and diesel oil
E.None of the above
In case of forced vortex
A.Velocity decreases with radius
B.Velocity increases with radius
C.The fluid rotates as a composite solid
D.The motion of fluid varies at random
E.The fluid rotates with radial as well vertical velocities.
The magneto in an automobile is basically
A.Transistor
B.D.C. generator
C.Capacitor
D.Magnetic circuit
E.A.C. generator
Which of the following remains constant during an adiabatic process?
A.internal energy
B.enthalpy
C.entropy
D.All of the above
Air fuel ratio in a petrol engine fitted with dirty air cleaner as compared to that with clean air clearance will be
A.Higher
B.Lower
C.Not affected
D.Fluctuating
E.Depends on load
A geodimeter is used for the measurements of
A.Distances
B.Angles
C.Areas
D.Volumes
E.Bearings of a point
Euler’s equation of motion can be integrated when it is assumed that
A.The fluid is incompressible
B.Bernoulli’s satisfied
C.Continrity equation is satisfied
D.Velocity potential exists and the density is constant
E.The flow is rotational
Crankshafts are generally
A.Sand cast
B.Die cast
C.Turned from bar stock
D.Forged
E.Cold headed
Which of the following is a mesomorphous material?
A.Glass
B.Silver
C.Gold
D.Mica
E.Brass
