Mechanical Engineering - Engineering Materials

16.
The quenching of steel from the upper critical point results in a fine grained structure.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and
chromium
silicon
manganese
magnesium
Answer: Option
Explanation:
No answer description is available. Let's discuss.

18.
Which of the following has a fine gold colour and is used for imitation jewellery?
Silicon bronze
Aluminium bronze
Gun metal
Babbit metal
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
When the steel is normalised, its
yield point increases
ductility decreases
ultimate tensile strength increases
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

20.
White cast iron has a high tensile strength and a low compressive strength.
Yes
No
Answer: Option
Explanation:

White cast iron has a low tensile strength and a high compressive strength.

Source: https://en.wikipedia.org/wiki/Cast_iron#Table_of_comparative_qualities_of_cast_irons