Basic Concepts of Chemical Engineering MCQs - Set 15 - ObjectiveBooks

Basic Concepts of Chemical Engineering MCQs - Set 15

Practice Test: Question Set - 15

1. To counteract the bad effects of strain hardening on a cold formed part, it must be
    (A) Tempered
    (B) Normalized
    (C) Annealed
    (D) Hardened

2. Which of the following metals reacts violently with water?
    (A) Mercury
    (B) Sodium
    (C) Calcium
    (D) Magnesium

3. The thermodynamic law, PVy = constant, is not followed by the
    (A) Free expansion of an ideal gas
    (B) Adiabatic expansion of steam in turbine
    (C) Adiabatic compression of air
    (D) Ideal compression of air

4. Steel is welded using the _________ flame.
    (A) Carburizing
    (B) Neutral
    (C) Oxidizing
    (D) All (a), (b) & (c)

5. The majority charge carriers in p-type silicon are
    (A) Free electrons
    (B) Ions
    (C) Conduction electrons
    (D) Holes

6. _________ is a special constituent of chlorophyll without which photosynthesis is not possible.
    (A) Calcium
    (B) Nitrogen
    (C) Phosphorous
    (D) Hydrogen

7. Quartz is a _________ material.
    (A) Diamagnetic
    (B) Ferromagnetic
    (C) Ferroelectric
    (D) Piezoelectric

8. The highest stress that a material can withstand for a specified length of time without excessive deformation is called the _________ strength.
    (A) Creep
    (B) Endurance
    (C) Fatigue
    (D) None of these

9. Force between the molecules of the same substance is called _________ force.
    (A) Adhesive
    (B) Cohesive
    (C) Molecular
    (D) Vander Walls

10. Coating thickness in case of galvanizing of steel sheet generally corresponds to the deposition of _________ gms of zinc per m2 of steel strip.
    (A) 5-10
    (B) 1000-1500
    (C) 120-500
    (D) 1500-3000

11. Which of the following is the most suitable abrasive for grinding high tensile strength materials?
    (A) Silicon carbide
    (B) Corundum
    (C) Aluminium oxide
    (D) Boron carbide

12. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
    (A) 1 : 1
    (B) 1 : 2
    (C) 2 : 1
    (D) 1 : 4

13. The noble metals
    (A) Are exemplified by Na, K and Li
    (B) Do not resist corrosion very strongly
    (C) Are the lowermost in the electro-chemical series of metals
    (D) None of these

14. Lead is poured into the joint between two _________ pipes.
    (A) Mild steel
    (B) Concrete
    (C) Cast iron
    (D) Asbestos cement

15. Unit of surface tension in S.I. unit is
    (A) Watt/m
    (B) Joule/m2
    (C) Newton/m2
    (D) Joule/m

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