Question with Answer Mechanical Engineering
1. Pure iron is the structure of
(a) Ferrite
(b) Pearlite
(C )Austenite
(d) Cementite
Ans. A
2. Babbit materials are used for
(a) Gears
(b) Bearings
(c ) Bolts
(d) Clutch liners
Ans. B
3. Which one of the following is the ferrous materials ?
(a) Zinc
(b) Iron
(c ) Silicon Carbide
(d) Copper
Ans. B
4. German silver is an alloy of
(a) Silver and Tin
(b) Silver and Gold
(C )Nickel and Copper
(d) Nickel , Copper and Zinc
Ans. D
5. Alloys with carbon content higher than 2.1% are known as :
(a) high speed steel
(b) hypoeutectoid steel
(c ) hypereutectoid steel
(d) cast iron
Ans. D
6. In the structure of steel, globular form of cementite is obtained through
(a) Normalising
(b) Carbonizing
(c )Spheroidising
(d) Malleabilising
Ans. D
7. Which of the following is close to the purest form of Iron ?
(a) Cast Iron
(b) Wrought Iron
(c ) Grey Iron
(d) Mild Steel
Ans. B
8. The percentage of carbon in low carbon steel
(a) 1.0 %
(b)0.15 %
(c )0.87%
(d)0.50%
Ans. B
9. 18/8 stainless steel contains
(a) 18% Nickel , 8% Chromium
( b) 18% Chromium, 8 % Nickel
(c )18% Tungsten , 8% Nickel
(d) 18 % Tungsten, 8 % Chromium
Ans. B
10. The unique property of cast iron is its high
(a) Malleability
(b) Ductility
(c )Hardness
(d) Damping characteristics
Ans. D