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Determine hardness of material:
Hardness is surface property. It can be defined as resistance of material against permanent deformation of surface in the form of scratch, indentation, cutting, or mechanical wear. The requirement of hardness test arises from the fact that in numerous engineering applications, 2 components in contact are made to slide over each other. Eventually, their surfaces are scratched and they may fail because of mechanical wear. This result in not only quick replacement of both parts but also incurs big loss in the terms of money.
For instance, piston ring of an I.C engine remains in sliding contact with cylinder body when piston reciprocates within the cylinder. If proper care is not taken in the selection of materials for then, the piston rings and cylinder will wear soon.
In this case replacement or repairing of cylinder block will require much time, trouble and money. Thus, the material of piston rings and cylinder block should be taken such that wear is least on cylinder. Thus in case of repairing, cheaper piston rings can be easily replaced. This envisages that the material of cylinder block should be harder than material of piston rings so that cylinder wears the least. This can be ascertained by the conduct of hardness test. This is why it is essential to know how this test can be conducted.
Find the minimum weight to keep equilibrium: A belt supports the two weights W 1 an d W 2 over a pulley as shown in the figure given below. If W 1 = 1000N, fi
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Angle of friction: It can be defined as the angle made by resultant of normal reaction ( R ) and limiting force of friction ( F ) with normal reaction ( R ). Let,
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Clutch free play: Check for free play of the clutch lever, it should be within 10-20 mm.
SHIELDING GAS ADVANTAGES Some of the advantages of GMAW process as compared to other arc welding process are as follows: It is a continuous welding process and can
(a) A 50 mm dia. jet having a velocity of 18 m/sec. impinges without shock on a flat plate inclined at an angle to the axis of jet. If the plate is moving at 5 m/sec in the directi
Determine moment of this normal force - rectangular beam: A rectangular beam contains a width of 100 mm and a depth of 200 mm. This is utilized as a simply supported beam & th
Details of rolling process,Different rolling methods,
Describe productivity. How do we calculate the productivity? Enumerate various factors effecting the productivity. Define various ways for the improvement of productivity.
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