Material Science And Metallurgy (3131904) MCQs

MCQs of Allotropy of Iron, Iron-Iron-Carbide equilibrium system

Showing 71 to 79 out of 79 Questions
5 6 7 8
71.

The main alloying elements high speed steel in order of increasing proportion are

(a)

vanadium, chromium, tungsten
(b)

tungsten, titanium, vanadium
(c)

chromium, titanium, vanadium
(d)

tungsten, chromium, titanium
Answer:

Option (a)

72.

According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is

(a)

0.04%
(b)

0.35 to 0.45%
(c)

0.4 to 0.6%
(d)

0.6 to 0.8%
Answer:

Option (b)

73.

18-4-1 high speed steel contains

(a)

vanadium 4%, chromium 18% and tungsten 1%
(b)

vanadium 1%, chromium 4% and tungsten 18%
(c)

vanadium 18%, chromium 1% and tungsten 4%
(d)

none of the above
Answer:

Option (b)

74.

The blade of a power saw is made of

(a)

boron steel
(b)

high speed steel
(c)

stainless steel
(d)

malleable cast iron
Answer:

Option (b)

75.

The steel widely used for motor car crankshafts is

(a)

nickel steel
(b)

chrome steel
(c)

nickel-chrome steel
(d)

silicon steel
Answer:

Option (b)

76.

Connecting rod is, usually, made from

(a)

low carbon steel
(b)

high carbon steel
(c)

medium carbon steel
(d)

high speed steel
Answer:

Option (c)

77.

The silicon steel is widely used for

(a)

connecting rods
(b)

cutting tools
(c)

generators and transformers in the form of laminated cores
(d)

motor car crankshafts
Answer:

Option (c)

78.

Ball bearings are, usually, made from

(a)

low carbon steel
(b)

high carbon steel
(c)

medium carbon steel
(d)

chrome steel
Answer:

Option (d)

79.

The cutting tools are made from

(a)

nickel steel
(b)

chrome steel
(c)

nickel-chrome steel
(d)

high speed steel
Answer:

Option (d)

Showing 71 to 79 out of 79 Questions
5 6 7 8