Chemical Engineering Basics Objective Questions - ObjectiveBooks

Chemical Engineering Basics Objective Questions

Practice Test: Question Set - 59

1. Common salt is produced from sea water in India generally by the _________ method.
    (A) Freeze drying
    (B) Solar evaporation
    (C) Electrolytic
    (D) None of these

2. Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be
    (A) 9.5 : 1
    (B) 12.5 : 1
    (C) 15.5 : 1
    (D) 18.5 : 1

3. Which of the following terminology is used for the temperature at which new grains are formed in a metal?
    (A) Eutectic temperature
    (B) Lower critical temperature
    (C) Recrystallisation temperature
    (D) Upper critical temperature

4. Which of the following phenomenon/ phenomena is/are diffusion controlled?
    (A) Dislocation climb
    (B) Cross-slip
    (C) Twinning
    (D) Recrystallisation

5. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
    (A) Cresylic acid
    (B) Xanthaies
    (C) Pine oil
    (D) All 'a' 'b' & 'c'

6. _________ the exhaust gas is an indication of the incomplete combustion of fuel.
    (A) Low temperature of
    (B) High temperature of
    (C) High % of CO in
    (D) High % of CO2 in

7. The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the _________ point of the material.
    (A) Elastic
    (B) Ultimate
    (C) Yielding
    (D) Breaking

8. In _________ process, there is an increase in entropy with no degradation of energy.
    (A) Isothermal expansion
    (B) Isochoric heat addition
    (C) Polytropic expansion
    (D) Isobaric heat addition

9. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterized by the
    (A) Low impact strength
    (B) High flexibility
    (C) Better finish and surface appearance
    (D) High plastic deformation

10. Air-petrol ratio in an automotive petrol engine is around
    (A) 14 : 1
    (B) 22 : 1
    (C) 25 : 1
    (D) 4 : 1

11. An approximately _________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.
    (A) Adiabatic
    (B) Isothermal
    (C) Isentropic
    (D) Isochoric

12. Pick out the wrong conversion of absolute & kinematic viscosities.
    (A) 1 stoke = 1 cm2/sec
    (B) 1 N.sec/m2 = 10 paise
    (C) 1 stoke = 1 m2/sec
    (D) 1 m2/sec = 104 stokes

13. _________ of test specimens is not involved in any hardness testing method.
    (A) Fracture
    (B) Indentation
    (C) Wear
    (D) Scratch

14. _________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.
    (A) Lancing
    (B) Shot peening
    (C) Slugging
    (D) Spinning

15. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
    (A) Small punches, broaches reamers and springs
    (B) Cutlery, screws, rivets and files
    (C) Mandrels, twist drills, small lathe tools and razors
    (D) Forgings like can shaft, structural steel plate, threading dies and drawing dies

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