In case of cast steel, the contraction allowance will be least for castings having dimensions
A.upto 600 mm
B.600 to 1000 mm
C.1000 mm to 1800 mm
D.above 1800 mm
Category: Mechanical Engineering Mcqs
Gold melts at
A.1063?C
B.1444?C
C.2100?C
D.3300?C
A pantograph is a mechanism with
A.Spherical pairs
B.Turning pairs
C.Rolling pairs
D.Lower pairs
E.Higher pairs
In a compression ignition engine higher combustion chamber wall temperature will
A.Reduce knocking tendency
B.Increase knocking tendency
C.Have no effect
D.Reduce exhaust temperature
E.None of the above
A vibrating system is said to be stable if
A.The amplitude of vibration decreases with time
B.The amplitude of vibration does not change with time
C.Only transient increases indefinitely with time
D.The total energy in the system does not change with time
E.None of the above
The numerical values of Young’s modulus of elasticity in descending order for wood, lead, glass, steel and phospor brouze is given by
A.Steel, Phosphor-bronze, Glass, Lead and Wood
B.Steel, Glass, Phosphor-bronze, Lead Wood
C.Steel, Wood, Lead Phosphor-bronze, Glass
D.Steel, Lead, Wood, Phosphor-bronze, Glass
E.Steel, Phosphor-bronze, Wood, Glass, Lead
The direction of Corioli’s component of acceleration is
A.The direction of relative velocity vector for the two coincidental points rotated by 90? in the direction of the angular velocity of the rotation of the link
B.The direction of relative velocity vector for the two coincidental points rotated by 180? in the direction of the angular velocity of the rotation of the link
C.The direction of relative velocity vector for the two coincidental points in the direction directly opposite to that of angular velocity
D.The direction at right angles to that of relative angular velocity vector
E.None of the above
Which one of the following does not fall under the category of hoisting equipment?
A.Pull lift
B.Jack
C.Chain hoist
D.Drag line
The operation of cutting out flat areas to some desired shape and which is generally the first step in a series of operations is known as
A.Coining
B.Curling
C.Blanking
D.Slitting
E.Lancing
Core prints are
A.made separately in the mould by hand
B.made in the mould be separate pattern
C.attached to pattern
D.none of the above
