Practice Test: Question Set - 24
1. Which of the following commercial metals is most abundantly found in India?
- (A) Copper
- (B) Aluminium
- (C) Nickel
- (D) Zinc
2. Which of the following is not an alloy of tin?
- (A) White-bearing metal
- (B) Pewter type metal
- (C) Soft solder
- (D) German silver
3. Coke oven regenerators are made of __________ bricks.
- (A) Fire clay
- (B) Silica
- (C) Low thermal conductivity
- (D) High electrical conductivity
4. __________ can replace tungsten in high speed steel,
- (A) Chromium
- (B) Vanadium
- (C) Cobalt
- (D) Molybdenum
5. Presence of high phosphorous in cast iron increases its
- (A) Fluidity
- (B) Melting point
- (C) Shrinkage
- (D) Tensile strength
6. The ability of a material to absorb energy in the elastic range is a measure of its
- (A) Toughness
- (B) Resilience
- (C) Malleability
- (D) Brittleness
7. The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
- (A) 0.2
- (B) 2
- (C) 4
- (D) 8
8. Mild steel is
- (A) A low carbon steel (0.05 to 0.3% carbon)
- (B) Highly resistant to corrosion (as much as stainless steel)
- (C) A high carbon steel (0.5 to 1.5% carbon)
- (D) Very poor in strength & ductility
9. Perspex is nothing but
- (A) Acrylic sheet
- (B) An elastomer
- (C) An alloy of lead and tin
- (D) Aluminium foil clad with Bakelite
10. Pick out the wrong statement.
- (A) Tin can be readily and very easily drawn into very fine wire
- (B) Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature
- (C) Tin exists in two allotropic forms
- (D) The predominant use of tin is in the form of coating for steel & copper alloys
11. Cementite is
- (A) Fe3C chemically
- (B) A compound of carbon and iron
- (C) Characterized by an orthorhombic crystal structure
- (D) All (a), (b) and (c)
12. The digester of a Gobar (cow dung) gas plant is a
- (A) Mild steel drum
- (B) Stainless steel vessel
- (C) Masonry well
- (D) Cast iron vessel
13. Monel alloy is
- (A) The costliest of all the alloys of nickel
- (B) Not suitable for making kitchen utensils
- (C) Used for making steam valves and turbine blades as it resists steam attack at high temperature
- (D) Not used in cast and wrought forms
14. Hot working of lead is carried out at
- (A) 75° C
- (B) 373° K
- (C) 150° C
- (D) Room temperature
15. Dielectric strength of a material is
- (A) Its energy storage capacity
- (B) A magnetic property
- (C) Its capacity to resist the flow of current
- (D) Its capacity to withstand high voltage
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