Which of the following is an example of cathodic protection of metals against corrosion ? Lead lined reactor Painted steel Galvanised iron Case hardened steel TRUE ANSWER : ? YOUR ANSWER : ?
Rain drops falling through atmospheric air attain limited terminal velocity, because of Force of gravity Viscous force exerted by air Upward thrust due to air Surface tension effects of water TRUE ANSWER : ? YOUR ANSWER : ?
Steel produced from phosphatic iron is __________ in nature. Malleable Ductile Brittle Tough TRUE ANSWER : ? YOUR ANSWER : ?
On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is Toughness Fatigue Tensile strength Creep TRUE ANSWER : ? YOUR ANSWER : ?
Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type Parallel flow with equal heat capacities Parallel flow with unequal heat capacities Counter flow with equal heat capacities Counter flow with unequal heat capacities TRUE ANSWER : ? YOUR ANSWER : ?
Dies for wire drawing are generally made of Carbides High carbon steel Mild steel Stainless steel TRUE ANSWER : ? YOUR ANSWER : ?
During sensible cooling of air, its wet bulb temperature Decreases & the dew point increases Decreases but dew point remains constant Increases & the dew point decreases Increases but dew point remains constant TRUE ANSWER : ? YOUR ANSWER : ?
__________ of air does not increase with increase in temperature. Density Thermal conductivity Thermal diffusivity Viscosity TRUE ANSWER : ? YOUR ANSWER : ?
Lead is added to 60:40 brass primarily to improve Corrosion resistance Machinability Fluidity Strength TRUE ANSWER : ? YOUR ANSWER : ?
Tempering of a material does not improve its Toughness Softness Internal stress level Machinability TRUE ANSWER : ? YOUR ANSWER : ?