Presence of high amount of silicon in cast iron Increases the contraction of the metal Suppresses the decomposition of Fe₃ C Increases the formation of graphite Reduces its fluidity TRUE ANSWER : ? YOUR ANSWER : ?
Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of Zircalloy Concrete Graphite Steel TRUE ANSWER : ? YOUR ANSWER : ?
Carbon content in steel is __________ percent. 0.001-0.01 0.1-2 43927 43865 TRUE ANSWER : ? YOUR ANSWER : ?
Molybdenum steels containing 0.15 to 0.40% molybdenum Are used for automobile parts like gears, axle, shaft, bearings etc Are prone to temper brittleness Have very poor fatigue resistance Do not contain nickel or chromium or both TRUE ANSWER : ? YOUR ANSWER : ?
Which one contains the least percentage of carbon? Wrought iron Pig iron High speed steel Cast iron TRUE ANSWER : ? YOUR ANSWER : ?
Presence of cobalt in steel improves its None of these Cutting ability Tensile strength Corrosion resistance TRUE ANSWER : ? YOUR ANSWER : ?
Hydrochloric acid absorber in made of Karbate Stainless steel Cast iron Mild steel TRUE ANSWER : ? YOUR ANSWER : ?
Post weld heat treatment is done by Solution annealing Stress relieving Normalising Tempering TRUE ANSWER : ? YOUR ANSWER : ?
The carbonating tower used in Solvay process of soda ash manufacture is made of Cast iron Karbate Stainless steel Lead lined steel TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not an alloy of copper? Admirability gun metal German silver Muntz metal Pewter metal TRUE ANSWER : ? YOUR ANSWER : ?