Basic Chemical Engineering Questions and Answers pdf - Set 26 - ObjectiveBooks

Basic Chemical Engineering Questions and Answers pdf - Set 26

Practice Test: Question Set - 26

1. Thermit welding uses the following energy source.
    (A) Electrical energy
    (B) Chemical energy
    (C) Energy of high velocity electrons
    (D) Heat generated by friction

2. A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is
    (A) Lead
    (B) Glass
    (C) Mica
    (D) Silver

3. Out of the following, the __________ pipe has the least corrosion resistance.
    (A) Mild steel
    (B) Copper
    (C) Cast iron
    (D) Wrought iron

4. The best guide to judge the general quality of water is the measurement of its
    (A) pH value
    (B) Electrical conductivity
    (C) Turbidity
    (D) Dissolved oxygen content

5. The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
    (A) Parabolic
    (B) Hyperbolic
    (C) Straight line
    (D) None of these

6. The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
    (A) 0.5
    (B) 3
    (C) 10
    (D) 25

7. Lead is poured into the joints between two __________ pipes.
    (A) Cast iron
    (B) Steel
    (C) Concrete
    (D) Plastic

8. All of the following alloying elements of steel increases hardness but sacrifice ductility, except
    (A) Nickel
    (B) Vanadium
    (C) Molybdenum
    (D) Chromium

9. Reduction in the grain size reduces the __________ of the material.
    (A) Fatigue resistance
    (B) Tensile strength
    (C) Creep resistance
    (D) All (a), (b) & (c)

10. Stainless steel is welded using
    (A) Oxy-acetylene flame
    (B) Oxy-hydrogen flame
    (C) Arc welding
    (D) Inert gas arc welding

11. Wrought iron is never shaped by
    (A) Casting
    (B) Cold working
    (C) Forging
    (D) Welding

12. Fibre glass is a composite material of
    (A) Glass fibre in a polymer matrix
    (B) Glass fibre in a metallic matrix
    (C) Polymer fibre in a glassy matrix
    (D) Both 'b' & 'c'

13. Mild steel has __________ crystal lattice structure.
    (A) Face centered cubic (fcc)
    (B) Body centered cubic (bcc)
    (C) Orthorhombic
    (D) Cubic

14. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
    (A) 20
    (B) 200
    (C) 500
    (D) 2000

15. Diffusion co-efficient of a metal in a solid solution depends upon its
    (A) Composition
    (B) Temperature
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

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