Chemical Engineering Online Quiz - Set 03 - ObjectiveBooks

Chemical Engineering Online Quiz - Set 03


1. Fluorine is not a constituent of
Freon
Chloroform
Teflon
Fluorocarbons

2. In spite of large heat transfer co-efficients in boiling liquids, fins are used advantageously, where the entire surface is exposed to __________ boiling.
Film
Nucleate
Transition
All modes of

3. The most important consideration in value engineering is the
Profit maximization
Customer satisfaction
Cost reduction
Process improvement

4. The single most important requirement for a turbine blade material is
Damping
Resilience
Creep resistaned
DBTT

5. Thermal expansion of solid is employed in the temperature measurement by a
Bimetallic thermometer
Thermocouple
Mercury thermometer
Resistance thermometer

6. Springback in sheet metal bending depends on the
Elastic limit
Bend radius
Degree of bend
Thickness of sheet

7. Which of the following is categorized as the plastic welding?
Gas welding
Electric arc welding
Forge welding
None of these

8. Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then
It will deliver low discharge of liquid
Its efficiency will not be affected
It will not develop sufficient head to raise water
It will be cavitated

9. Which of the following is not a natural abrasive?
Silicon carbide
Quartz
Corundum
Emery

10. Out of the following, the materials having maximum magnetic permeability is
Silicon steel (Si = 4%)
Cast iron
Wrought iron
Mild steel

11. Out of the following, the highest emf for a given temperature is generated by the __________ thermocouple.
Chromel - Alumel
Iron - constantan
Platinum - platinum + rhodium
Copper-constantan

12. Classification of metal forming processes into hot and cold working is based on the following parameters.
Stacking fault energy
Recrystallization temperature
Solidus temperature
Transformation temperature

13. An ingot is hot forged to a 60% reduction in cross-section area. The percentage reduction in the volume for the above process is
0
60
30
20

14. Welded joint is superior to riveted joint in respect of ease of fabrication, weight and strength. Which of the following joints is the most suitable for pipes carrying fluids under high pressure and temperature?
Flanged joint
Expansion joint
Bell and spigot joint
None of these

15. Permanent set in a material is produced by subjecting it to
Triaxial loading
Fatigue loading
Stresses beyond the elastic limit
Tensile and compressive loads simultaneously

16. When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
Cooled and dehumified
Heated and humidified
Cooled and humidified
Heated and dehumidified

17. During solid state sintering of powders, the following mechanism can be active.
Evaporation and condensation
Solid state diffusion processes
Liquid formation in grain boundaries
Creation of more dislocations

18. A coal with high __________ content will ignite most easily.
Hydrogen
Oxygen
Volatile matter
Fixed carbon

19. Metals in general have a low value of thermal
Conductivity
Diffusivity
Inertia
All (a), (b) and (c)

20. Property of a material to resist a tensile force without giving away is a measure of its
Stiffness
Toughness
Resilience
Tenacity

     Score =

Correct answers:

    Blogger Comment
    Facebook Comment

0 blogger:

Post a Comment