Which of the following operations improve wear resistance and mechanical properties of castings?
A.Shot peening
B.Chilling
C.Nitriding
D.All of the above
A.Shot peening
B.Chilling
C.Nitriding
D.All of the above
A.200 Mpa
B.Mpa
C.5 Mpa
D.10 Mpa
E.20 Mpa
A.an elliptical path
B.a parobolic path
C.a circular path
D.none of the above
A.Impact strength is high
B.With static loading the strength in tension is higher than that in compression
C.With static loading the strength in tension is lower than that in compression
D.(A) and (B) above
E.(A) and (C) above
A.Potential energy
B.Kinetic energy
C.Spring energy
D.Mechanical potential energy
E.Both potential and kinetic energy
A.Brass
B.Silver
C.Copper
D.Lead
E.Aluminium
A.High compression ratio
B.Fine atomisation of fuel
C.High charge density
D.Large quantity of excess air
E.None of the above
A.Double of the actual discharge
B.Square of the actual discharge
C.Actual discharge
D.Half of actual discharge
E.Square root of actual discharge
A.Pressure
B.Flow
C.Mass flow rate
D.All of the above
A.Perfectly elastic
B.Perfectly inelastic
C.50% elastic
D.Partly elastic
E.Partly inelastic