Modern Construction Materials Short Questions - Set 05 - ObjectiveBooks

Modern Construction Materials Short Questions - Set 05

Practice Test: Question Set - 05

1. To improve the machinability of steel by its softening, it is subjected to
    (A) Cold working
    (B) Annealing
    (C) Shot blasting
    (D) Heating

2. __________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working.
    (A) Solid solution hardening
    (B) Screw dislocation
    (C) Strain ageing
    (D) Twinning

3. Which of the following has the least value of ultimate tensile strength (UTS)?
    (A) Medium carbon steel
    (B) High carbon steel
    (C) Cast iron
    (D) Wrought iron

4. Presence of nitrogen in steel
    (A) Makes it brittle
    (B) Increases its strength
    (C) Increases its hardness
    (D) Is desirable

5. With increase in the carbon percentage in the steel, its
    (A) Hardness increases
    (B) Ductility reduces
    (C) Tensile strength increases
    (D) All (a), (b) and (c)

6. Among the tin containing alloys, __________ consumes the maximum amount of tin.
    (A) Solder
    (B) White metal
    (C) Pewter metal
    (D) Bronzes

7. Bearings subjected to light load are made of
    (A) White metal
    (B) Phosphorous bronze
    (C) Monel
    (D) Silicon bronze

8. Pick out the wrong statement
    (A) Hardening makes the steel more brittle
    (B) High alloy steels contain more than 50% alloying element
    (C) 18/8 stainless steel is a magnetic steel
    (D) Both (b) and (c)

9. Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its
    (A) Corrosion resistance
    (B) Tensile strength
    (C) Machinability
    (D) Compressive strength

10. Polymerization reactor used in the production of styrene butadiene rubber (SBR) is made of
    (A) Stainless steel or glass lined steel
    (B) Nickel clad steel
    (C) High silicon cast iron
    (D) Aluminium

11. In SO3 absorber (Contact Process), packing material used is of
    (A) Cast iron
    (B) Chemical stoneware
    (C) Karbate
    (D) Mild steel

12. Which of the following finds the least commercial use?
    (A) Pure iron
    (B) High silicon iron
    (C) Low carbon steel
    (D) High carbon steel

13. __________ does not contain copper as an alloying element,
    (A) Nichrome
    (B) Manganin
    (C) Perminvar
    (D) Monel metal

14. German silver is an alloy of copper, nickel and
    (A) Zinc
    (B) Silver
    (C) Tin
    (D) Lead

15. The chlorinator used in the manufacture of DDT is made of
    (A) Glass
    (B) Glass lined steel
    (C) Teflon
    (D) Bakelite

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