Mechanical Engineering - Engineering Materials

36.
Which of the following display properties similar to that of steel?
Blackheart cast iron
Whiteheart cast iron
both (a) and (b)
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.

38.
When a low carbon steel is heated upto upper critical temperature
there is no change in grain size
the average grain size is a minimum
the grain size increases very rapidly
the grain size first increases and then decreases very rapidly
Answer: Option
Explanation:
No answer description is available. Let's discuss.

39.
The steel widely used for motor car crankshafts is
nickel steel
chrome steel
nickel-chrome steel
silicon steel
Answer: Option
Explanation:
No answer description is available. Let's discuss.

40.
Combined carbon in iron makes the metal
soft and gives coarse grained crystalline structure
soft and gives a fine grained crystalline structure
hard and gives a coarse grained crystalline structure
hard and gives a fine grained crystalline structure
Answer: Option
Explanation:
No answer description is available. Let's discuss.