Materials and Construction Online MCQ Test - Set 01 - ObjectiveBooks

Materials and Construction Online MCQ Test - Set 01

Practice Test: Question Set - 01

1. A metallic alloy in general as compared to their pure metal components is
    (A) More corrosion resistant
    (B) Having higher melting point
    (C) Having lower hardness, reactivity and fusibility
    (D) Having lower electrical conductivity

2. Which of the following will have the highest melting point?
    (A) Pig iron
    (B) Mild steel
    (C) Wrought iron
    (D) High carbon steel

3. Which of the following is produced by addition polymerisation?
    (A) Polybutadiene
    (B) Phenol formaldehyde
    (C) Urea-formaldehyde
    (D) Dacron

4. Containers made of high silicon cast iron (14% Si) are not suitable for the storage of
    (A) Acetic acid
    (B) Benzoic & boric acids
    (C) Phosphoric acid (95%) & sulphuric acid (95%)
    (D) Hydrochloric acid (concentrated)

5. Cast iron is
    (A) Used for making shock resisting parts
    (B) Manufactured in cupola and is brittle
    (C) Having compressive strength more than its tensile strength
    (D) All (a), (b) & (c)

6. Alinco, which is a aluminium-cobalt-nickel steel, is used for making
    (A) Surgical instruments
    (B) Powerful magnets
    (C) Chemical equipments
    (D) Boiler tubes

7. Maximum carbon content in cast iron is __________ percent.
    (A) 3.8
    (B) 5.2
    (C) 4.8
    (D) 4.3

8. Which of the following comprises of hydrocarbons?
    (A) Mica flakes
    (B) Glass
    (C) Rubber
    (D) None of these

9. Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with
    (A) Acidic refractory
    (B) Rubber
    (C) Karbate
    (D) Lead or acid-proof bricks

10. The softest material just next to talc in the Mho's scale is
    (A) Quartz
    (B) Gypsum
    (C) Feldspar
    (D) Fluorite

11. __________ iron is produced, when molten pig iron is allowed to cool gradually.
    (A) White cast
    (B) Grey cast
    (C) Wrought
    (D) None of these

12. 'Age hardening' of duralumin is due to
    (A) Copper
    (B) Magnesium
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

13. Reduction in the grain size reduces the __________ of the material.
    (A) Fatigue resistance
    (B) Tensile strength
    (C) Creep resistance
    (D) All (a), (b) & (c)

14. Pick out the wrong statement.
    (A) The toughness of a material decreases, when it is heated
    (B) Crane hooks are normally made of wrought iron
    (C) Cold working of a metal decreases its fatigue strength
    (D) The temperature at which new grains are formed in a metal is known as the recrystallization temperature

15. Ferric stainless steels compared to austenitic stainless steels
    (A) Have lower corrosion resistance
    (B) Are harder to fabricate
    (C) Are less ductile and hence less suitable for cold pressing
    (D) All (a), (b) and (c)

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