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)