Basics of Chemical Engineering for Interview Questions - Set 18 - ObjectiveBooks

Basics of Chemical Engineering for Interview Questions - Set 18

Practice Test: Question Set - 18

1. Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.
    (A) Copper
    (B) Steel
    (C) Aluminium
    (D) Brass

2. Water-tube boiler is the one, in which
    (A) Water passes through tubes and flue gases around it
    (B) Tube carrying hot flue gases are immersed in a pool of water
    (C) Tubes are placed in vertical position
    (D) None of these

3. Silicon in steel
    (A) Makes it usable in almost all magnetic circuits where alternating current is used
    (B) Increases its electrical resistivity and decreases the hysteresis loss
    (C) Is present upto 5% & 4% respectively when used in transformers & motor armatures
    (D) All 'a', 'b' & 'c'

4. Ferromagnetic materials owe their properties to __________ inner sub-shells.
    (A) Completely filled
    (B) Partially filled
    (C) Equally filled
    (D) Vacant

5. Superheating of steam is done at constant
    (A) Enthalpy
    (B) Entropy
    (C) Pressure
    (D) Volume

6. The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element.
    (A) Silicon
    (B) Carbon
    (C) Phosphorous
    (D) Chromium

7. Corrosion is
    (A) A physical phenomenon
    (B) A chemical phenomenon
    (C) Same as erosion
    (D) An uncontrollable phenomenon

8. Pick out the wrong statement.
    (A) Copper is the metal having the highest electronic conductivity
    (B) Hardenability & Weldability of metals are inversely related
    (C) Covalent bonding formed by sharing of electrons is present in all semi-conductor materials
    (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

9. Which of the following phenomenon will exhibit the minimum heat transfer?
    (A) Boiling
    (B) Forced convection in air
    (C) Free convection in air
    (D) Conduction in air

10. Out of the following, which will fracture most readity, when hit with a hard hammer?
    (A) Brass
    (B) Bronze
    (C) German silver
    (D) Cast iron

11. Which of the following metals cannot be hot worked at room temperature?
    (A) Zinc
    (B) Nickel
    (C) Lead
    (D) Tin

12. _________ stress cannot be sustained by a fluid in equilibrium.
    (A) Shear
    (B) Tensile
    (C) Compressive
    (D) None of these

13. Which of the following equipments is used for liquid dispersion?
    (A) Packed column
    (B) Venturi scrubber
    (C) Bubble cap plate column
    (D) Wetted wall column

14. Oxyacetylene reducing flame is used while carrying out welding on
    (A) Alloy steel
    (B) Grey cast iron
    (C) Mild steel
    (D) High carbon steel

15. Limestone is added in the blast furnace (during pig iron manufacture) to
    (A) Form slag by combining with impurities
    (B) Supply heat by undergoing exothermic reaction with impurities
    (C) Reduce the coke consumption
    (D) Reduce slag viscosity

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