Basic of Chemical Engineering - Set 53 - ObjectiveBooks

Basic of Chemical Engineering - Set 53

Practice Test: Question Set - 53

1. The atmospheric temperature during melting of ice/snow (in the atmosphere)
    (A) Decreases
    (B) Increases
    (C) Remain same
    (D) May increase or decrease; depends on the altitude where snow melts

2. Identify the correct statement with reference to the extractive metallurgy of aluminium.
    (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
    (B) Approximately 80% of the aluminium deposited on the cathode comes from cryolite
    (C) Sodium is deposited along with aluminium, but is immediately vaporized
    (D) Anode effect sets in when the cryolite concentration goes below 40%

3. __________ is not a case hardening process.
    (A) Carburizing
    (B) Nitriding
    (C) Cyaniding
    (D) Annealing

4. The main charge in blast furnace is usually
    (A) Iron ore & coke
    (B) Iron ore, coke & air
    (C) Limestone, coke & iron ore
    (D) Limestone, sand & iron ore

5. Removal of non-condensable from steam or other vapor is termed as the __________ process.
    (A) Condensation
    (B) Deaeration
    (C) Scavenging
    (D) Exhaust

6. Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel.
    (A) 0.01 to 0.10
    (B) 0.2 to 0.4
    (C) 0.5 to 0.7
    (D) 0.8 to 1.0

7. __________ cannot increase the fatigue strength of a material.
    (A) Grain refining
    (B) Grain coarsening
    (C) Surface hardening
    (D) Shot peening

8. In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of
    (A) Stainless steel
    (B) Mild steel
    (C) High speed steel
    (D) High carbon steel

9. Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
    (A) Pitot tube
    (B) Hot wire anemometer
    (C) Rotameter
    (D) Stroboscope

10. Production of a hollow product by inflation of a tube or parison is called the __________ process.
    (A) Blow moulding
    (B) Calendaring
    (C) Extrusion
    (D) Injection

11. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas)
    (A) √T
    (B) 1/√P
    (C) √y
    (D) 1/√ρ

12. Unbreakable crockeries are made from __________ polymers.
    (A) Polystyrene
    (B) Melamine
    (C) Polystyrene
    (D) Polyurethane

13. Coarse grained steels have
    (A) Low toughness
    (B) No tendency to distort
    (C) High density
    (D) Very high toughness

14. A form of stress corrosion failure termed as 'season cracking' is generally observed in
    (A) Thermosetting polymers
    (B) High carbon steels
    (C) Brasses
    (D) Borosilicate glasses

15. Hot & cold working of material causes its __________ deformation.
    (A) Visco-elastic
    (B) Isotropic
    (C) Elastic
    (D) Plastic

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