Chemical Engineering Objective Questions - Set 41 - ObjectiveBooks

Chemical Engineering Objective Questions - Set 41

Practice Test: Question Set - 41

1. The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their
    (A) Equivalent weight
    (B) (Equivalent weight)2
    (C) Molecular weight
    (D) (Molecular weight)2

2. Viscoelastic behavior is observed in __________ materials.
    (A) Non-crystalline organic polymeric
    (B) Ceramic
    (C) All crystalline
    (D) All amorphous

3. __________ furnace is generally used in the non-ferrous foundries.
    (A) Direct arc
    (B) Indirect arc
    (C) Resistance
    (D) Induction

4. Load cells used for the measurement of weight has
    (A) Compact & rugged construction with an accuracy of 0.1 to 1%
    (B) No moving parts and incurs negligible deflection under load
    (C) Provision of thermal compensation and is hermetically sealed
    (D) All 'a', 'b' & 'c'

5. Volumetric composition of flue gas analyzed with the Orsat apparatus is:

CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that

    (A) Pure oxygen has been used for combustion
    (B) Nitrogen percentage in the fuel is very high
    (C) Excess air has been used for combustion
    (D) Hydrogen is not present in the fuel

6. The order of a chemical reaction
    (A) Can be determined only experimentally
    (B) Can be determined from the stoichiometry of the reaction
    (C) Cannot be zero
    (D) Can be fractional

7. In a good rimming steel
    (A) Carbon and silicon should be low
    (B) Silicon should be low but carbon should be high
    (C) Both silicon & carbon should be high
    (D) Silicon should be high but carbon should be low

8. With increase in temperature, the electrical conductivity of a __________ decreases.
    (A) Semi-conductor
    (B) Metal or alloy
    (C) Dielectric
    (D) None of these

9. Out of the following the refractive index is the highest for
    (A) Glass
    (B) Diamond
    (C) Brine
    (D) Kerosene

10. For an ideal gas, Cp - Cv is
    (A) R
    (B) -R
    (C) 0
    (D) (3/2) R

11. Which of the following if present in iron ore, enhances its value?
    (A) Alumina
    (B) Alkali oxide
    (C) Lime & Magnesia
    (D) None of these

12. Pick out the wrong statement.
    (A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding
    (B) Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded)
    (C) In spot welding, two pieces to be joined are overlapped and placed between two electrodes
    (D) Mild steel sheet cannot be spot welded

13. Name the safety device used to protect the boiler, when the water level falls below a minimum level.
    (A) Blow down valve
    (B) Blow off cock
    (C) Fusible plug
    (D) Safety valve

14. Which of the following materials has the poorest electrical conductivity?
    (A) Carbon
    (B) Aluminium
    (C) Silver
    (D) Stainless steel

15. __________ rubber is generally used for making 'O' rings used for vacuum sealings.
    (A) Natural
    (B) Neoprene
    (C) Butadiene
    (D) Nitrile

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