Out of the following, which will fracture most readity, when hit with a hard hammer ? Brass Cast iron German silver Bronze TRUE ANSWER : ? YOUR ANSWER : ?
Out of the following, the dimensionless quantity is Mach number Density Viscosity Specific weight TRUE ANSWER : ? YOUR ANSWER : ?
Fatigue resistance of a material is measured by the Endurance limit Ultimate tensile strength Young's modulus Elastic limit TRUE ANSWER : ? YOUR ANSWER : ?
The velocity of sound in air is independent of changes in its Temperature Humidity None of these Pressure TRUE ANSWER : ? YOUR ANSWER : ?
The weight of a body at the centre of the earth is None of these Same as on the surface of the earth Infinite Zero TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not a characteristic observed in material failure by fatigue fracture ? Initation of crack occurs on the surface of the machine part Plastic deformation of material does not occur Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface Initiation of crack from below the surface does not occur TRUE ANSWER : ? YOUR ANSWER : ?
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure. Hexagonal close, packed (hcp) Simple cubic Body centred cubic (bcc) Face centred cubic (fcc) TRUE ANSWER : ? YOUR ANSWER : ?
In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following : Mixture of water and air Blast of air Rain of molten lead Jet of water at high pressure TRUE ANSWER : ? YOUR ANSWER : ?
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is Patenting Bright annealing None of these Full annealing TRUE ANSWER : ? YOUR ANSWER : ?