Chemical Engineering Basic Questions - Set 10 - ObjectiveBooks

Chemical Engineering Basic Questions - Set 10

Practice Test: Question Set - 10


1. Which of the following materials has the maximum shrinkage allowance?
    (A) Brass
    (B) Cast iron
    (C) Lead
    (D) Aluminium alloy

2. In multipass welds, shot peening is done after each pass to
    (A) Close the surface porosity
    (B) Break the continuity of columnar grains
    (C) Flatten the weldment
    (D) Introduce texture in the weld

3. A reduction in thermal resistance during heat transfer does not occur in the
    (A) Convection heat transfer by stirring the fluid and cleaning the heating surface
    (B) Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity
    (C) Radiation heat transfer by increasing the temperature and reducing the emissivity
    (D) None of these

4. Pick out the correct combination about the role of various additives used in polymers.
    (A) Plasticiser: increases the polymer strength
    (B) Heat stabilizer: increases the maximum service temperature
    (C) Fillers: Does not affect the property of polymer but increases its weight
    (D) Lubricants: increases the flexibility of polymers

5. Color comparator is used to measure the
    (A) pH value
    (B) Electrode potential
    (C) Color intensity
    (D) None of these

6. Which of the following is not used as a bearing material?
    (A) Copper-lead alloys
    (B) Babbitts
    (C) Bronzes
    (D) Cermets

7. Tumbling is the process of improving the __________ of the materials/parts.
    (A) Surface finish
    (B) Fatigue limit
    (C) Creep limit
    (D) Surface cleanliness

8. The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability?
    (A) Lead
    (B) Copper
    (C) Aluminium
    (D) Wrought iron

9. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
    (A) 1.5
    (B) 3
    (C) 5
    (D) 7

10. Oxide layer formed on the non-ferrous metal surface after its annealing is
    (A) Removed by acid pickling
    (B) Hammered into the surface
    (C) Removed with coarse emery cloth
    (D) Left as such to protect the surface

11. Chlorine acts as a bleaching agent only in the presence of
    (A) Dry air
    (B) Pure oxygen
    (C) Moisture
    (D) Sunlight

12. Case hardening is not done by
    (A) Nitriding
    (B) Hot dipping
    (C) Electroplating
    (D) Both b & c

13. Powder metallurgy technique is used in the production of __________ tools.
    (A) Tungsten carbide
    (B) High carbon steel
    (C) High speed steel
    (D) Drilling

14. Upto the critical radius of insulation, added insulation, will
    (A) Increase the heat loss
    (B) Decrease heat loss and will have no effect beyond that
    (C) Decrease heat flux
    (D) Reduce convection heat loss compared to conduction heat less

15. Rain drops falling through atmospheric air attain limited terminal velocity, because of
    (A) Upward thrust due to air
    (B) Viscous force exerted by air
    (C) Surface tension effects of water
    (D) Force of gravity

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