Specific speed for reaction turbine ranges from
A.3 – 710
B.10 – 110
C.125 – 180
D.200 – 300
E.More than 300
Category: Mechanical Engineering Mcqs
The type of grains usually preferred for moulding sand are
A.Round
B.Hemishperical
C.Cylindrical
D.Cubical
E.Sharp irregular shaped
The statement the resultant of the external forces applied to a body (rigid or non-rigid) composed of a system of particles is equivalent to the vector summation of the effective forces acting on all particles-is known as
A.Nowton’s law
B.Corollary to Newton’s laws of motion
C.Mohr’s principle
D.D’ Alembert’s principle
E.Principle of dynamics
The molecular volume of all the gases at 2 ata and 30?C is
A.1.0 cm-m
B.1.562 cu-m
C.8.48 cu-m
D.12.847 cu-m
E.25.794 cu-m
Brass is
A.Copper-zinc alloy
B.Copper-tin alloy
C.Copper-lead alloy
D.Copper-nickel alloy
E.Copper aluminium alloy
Cut of ratio in a steam engine is the ratio of
A.Pressure at cut off to supply pressure
B.Pressure at cut off to exhaust pressure
C.Pressure at cut off to mean effective pressure
D.Fraction of piston stroke which the piston has travelled when cut off occurs
E.Work done by piston after cut off to total work done per cylinder
For flow of petrol from fuel tank to the carburettor, the fuel system includes
A.An acceleration pump
B.A vacuum pump
C.A fuel pump
D.A suction pump
E.A float
Pour point of a fluid
A.relates to a considerable increase of viscosity with decrease in temperature
B.refers to the change of phase from liquid to solid
C.refers to sudden discontinuity in fluid properties
D.none of the above
The secondary critical speed of a shaft occurs at
A.Half the primary critical speed
B.Twice the primary critical speed
C.Four times the primary critical speed
D.Occurs only when there are more than 2 rotors on a shaft
E.If the externam exciting system has a frequency other than the primary critical speed
A 660 V cable is known as
A.Low tension cable
B.High tension cable
C.Super tension cable
D.Extra high tension cable
E.Extra super voltage cable
