A. refine grain structure
B. reduce segregation in casting
C. improve mechanical properties
D. induce stresses-
E. relieve internal stresses
Related Mcqs:
- Which is false statement about annealing. Annealing is done to________________?
A. relieve stresses
B. harden steel slightly
C. improve machining characteristic
D. soften material
E. permit further cold working - Which is false statement about tempering. Tempering is done to_______________?
A. improve machinability
B. improve ductility
C. improve toughness
D. release stresses
E. reduce hardness and brittleness - Which is false statement about case hardening. Case hardening is done by_______________?
A. electroplating
B. cyaniding
C. induction hardening
D. nitriding
E. flame hardening - Which is the false statement about wrought iron. It has________________?
A. high resistance to rusting and corrosion
B. high ductility
C. ability of hold protective coating
D. easily weldable characteristics
E. uniform strength in all directions - Which is false statement about properties of aluminium ___________________?
A. modulus of elasticity is fairly low
B. wear resistance is very good
C. fatigue strength is not high
D. creep strength limits its use to fairly low temperatures
E. corrosion resistance is good - Pick up the false statement ?
A. Thermal efficiency of diesel engine i about 34%
B. Theoretically correct mixture of air am petrol is approximately 15 : 1
C. High speed compression engines operate on dual combustion cycle
D. Diesel engines are compression ignition engines
E. S.I. engines are quality-governed engines - Which is false statement about advantages of V-type engine_________________?
A. compact design requiring lesser space
B. improved distribution of air to cylinder
C. casting less liable to distortion
D. reduced torsional vibration because of shorter crankshaft
E. less overhead clearance - Pick up false statement?
A. For petrol and large gas engines, quantity governingds preferred
B. In quantity governing, air fuel ratio is almost constant and quantity of charge is changed depending on load
C. In hit and miss governing, fuel supply is completely cut off during one or more number of cycles
D. In quality governing, quantity of fuel is varied to suit the load and total charge of air is varied
E. For close regulation of speed, combination of both quality and quantity governing is used - Pick up the wrong statement Nickel and chromium in steel help in _________________?
A. providing corrosion resistance
B. improving machining properties
C. providing high strength at elevated temperatures
D. raising the elastic limit
E. improving the resilience and ductility - Feed water conditioning in thermal power plants in done to__________________?
A. reduce hardness and for removal of solids
B. increase efficiency-of thermal power plant
C. increase *heat transfer rate
D. increase steam parameters
E. all of the above
