Chemical Engineering - Materials and Construction

41.
High speed cutting tool steels contain about __________ percent of tungsten.
6-8
18-20
30-35
50-55
Answer: Option
Explanation:
No answer description is available. Let's discuss.

42.
The 'bomb' in the bomb calorimeter is made of
molybdenum stainless steel
mild steel
high silicon iron (14% Si)
copper
Answer: Option
Explanation:
No answer description is available. Let's discuss.

43.
Which of the following is produced by condensation polymerisation ?
Bakelite
Polythene
Poly vinyl chloride
Polystyrene
Answer: Option
Explanation:
No answer description is available. Let's discuss.

44.
The crystal structure of most of the common metals is
orthorhombic
cubic
hexagonal
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

45.
Telfon (PTFE) is corroded by
hydrochloric acid (10%)
hydrochloric acid (95%)
sulphuric acid
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.