Practice Test: Question Set - 01
1. Steels used for welded assemblies are
- (A) Medium
carbon steel
- (B) Mild
steel
- (C) High
carbon steel
- (D) Alloy steel
2. Material used for bearing bushes is
- (A) Phosphor
bronze
- (B) Gunmetal
- (C) Babbitt
- (D) Any
one of above
3. Hardness of steel is increased by adding,
- (A) Chromium
- (B) Molybdenum
- (C) Tungsten
- (D) All
of above elements
4. Plain carbon steel designated by 40C8 means,
- (A) Plain
carbon steel with ultimate tensile strength of 400 N/mm2 and 0.8% carbon
- (B) Plain
carbon steel with 0.35 to 0.45% carbon and 0.7to 0.9% manganese
- (C) Plain
carbon steel with 0.8% carbon and 4 % manganese
- (D) Plain
carbon steel with 40% carbon and 8% manganese
5. Synthetic rubber is used for
- (A) V-belt
- (B) Gasket
- (C) Seals
- (D) All three
parts
6. Which of the following materials has maximum strength?
- (A) Grey cast
iron
- (B) Plain carbon
steel
- (C) Alloy steel
- (D) Aluminium
alloy
7. Toughness of steel is increased by adding,
- (A) Nickel
- (B) Chromium
- (C) Sulphur
- (D) Tungsten
8. Plain carbon steels are designated by,
- (A) Tensile
strength
- (B) Carbon
content
- (C) Composition
of alloying element
- (D) None of the
above
9. Which of the following materials has maximum ductility?
- (A) Grey
cast iron
- (B) Mild steel
- (C) Alloy steel
- (D) High carbon
steel
10. Medium carbon steel contains
- (A) Less than
0.3% carbon
- (B) 0.3 to 0.5%
carbon
- (C) 0.5 to 1.4%
carbon
- (D) 3 to 4%
carbon
11. Hardness of steel is increased by adding,
- (A) Nickel
- (B) Molybdenum
- (C) Sulphur
- (D) None of
above
12. In free cutting steels, important alloying element is
- (A) Nickel
- (B) Chromium
- (C) Sulphur
- (D) Tungsten
13. Material used for machine tool beds is
- (A) Cast iron
- (B) Mild steel
- (C) High carbon
steel
- (D) Alloy steel
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