Balls for a ball bearing are made of
A.Stainless steel
B.Carbon chrome steel
C.High speed steel
D.Stainless steel
E.Mild steel
Category: Mechanical Engineering Mcqs
Exhaust gases from a engine possess
A.Potential energy
B.Kinetic energy
C.Chemical energy
D.Solar energy
E.Stored energy
Radial distance from the top to the pitch circle for a tooth is known as
A.working depth
B.dedendum
C.addendum
D.None of the above
In the theory of lubrication the assumption is made that
A.The velocity distribution is the same at all cross-sections
B.The velocity distribution at any section is the same as if the plates were parallel
C.The pressure variation along the bearing is the same as if the plates were parallel
D.The velocity varies linearly between the two surfaces
E.The velocity varies linearly between the two surfaces
A worker’s real wages are determined by
A.The average daily wage
B.The purchasing power of his earnings
C.The money value of his production
D.The actual amount paid in lieu of work done
E.Any of the above
Which of the following ray has least wavelength?
A.Cosmic rays
B.X-rays
C.Ultraviolet rays
D.Infra-red rays
E.Yellow light rays
Case hardening
A.Is done to induce hardness in the core of materials
B.Is followed by tempering
C.Is preceded by tempering
D.Is allowed by carburizing
E.Is done to get a soft ductile interior with a very hard surface
The portion of the power canal that extends from the intake works to the power house, is known as
A.Lead race
B.Main storage
C.Diversion canal
D.Head race
E.Tail race
A steel specimen is heated to 730?C and cooled at the slowest possible rate in the furnace. Which property will be imparted to the steel piece?
A.Hardness
B.Softness
C.Toughness
D.Tempering
Which variety of cast iron can be forged?
A.Grey cast iron
B.High silicon cast iron
C.Wrought iron
D.All of the above
