21. Normalising of a casting does not
22. Normalising of an object does not
23. __________ is not used as the control rod material in a nuclear reactor.
24. Young's modulus of a material is the measure of its
25. __________ is the hardest material out of the following.
26. With decrease in the grain size of a material, its creep resistance
27. Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.
28. Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?
29. Which of the following is not a principal alloying element for the structural steel?
30. Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and
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