- (A) Tin can be readily and very easily drawn into very fine wire
- (B) Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature
- (C) Tin exists in two allotropic forms
- (D) The predominant use of tin is in the form of coating for steel & copper alloys
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- (A) Ostwald chart
- (B) Cox chart
- (C) Sankey diagram
- (D) None of these
- (A) Accelerating the rate of scaling
- (B) Causing metal embrittlement
- (C) Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature
- (D) All
- (A) 20
- (B) 40
- (C) 65
- (D) 80
- (A) Pure rubber is as useless as pure gold as a material of construction
- (B) Thermal conductivity of aluminium is higher than that of copper; hence it is increasingly used for utensil making
- (C) Copper has poor weldability
- (D) Reinforced plastics are made from both thermoplastic as well as thermosetting plastics
- (A) 10
- (B) 25
- (C) 65
- (D) 90
- (A) Saving in fuel consumption
- (B) Reduction in scale losses
- (C) Increase in flame temperature
- (D) All
- (A) 20
- (B) 40
- (C) 60
- (D) 80
- (A) Fire tube
- (B) Water tube
- (C) Waste heat
- (D) Natural circulation
- (A) Glass
- (B) Stainless steel
- (C) Potteries
- (D) Refractory bricks
