Chemical Process Engineering Beyond the Basics - Set 23 - ObjectiveBooks

Chemical Process Engineering Beyond the Basics - Set 23

Practice Test: Question Set - 23

1. What is the value of entropy at 273°K?
    (A) 0
    (B) 1
    (D) None of these

2. A high pressure boiler generates steam at a pressure greater than __________ kg/cm2.
    (A) 10
    (B) 30
    (C) 50
    (D) 80

3. Vernier calipers cannot be used to measure the
    (A) I.D. & O.D. of the shaft
    (B) Thickness of parts
    (C) Depth of holes
    (D) Clearance between two mating surfaces

4. The best lubricants for a machine working at high temperature & load is
    (A) Grease
    (B) Solid lubricant
    (C) Animal oils
    (D) Mineral oils

5. Powder metallurgy process does not make metal powder by
    (A) Atomisation
    (B) Grinding/milling
    (C) Hammering
    (D) Electrolytic deposition

6. Ammonia leakage in the refrigeration system is detected by
    (A) Sulphur stick, which on detection gives white smoke
    (B) Using chemical reagents
    (C) Its smell
    (D) Soap solution

7. Wrought iron is not
    (A) Ductile & resistant to corrosion/rusting
    (B) Weldable easily
    (C) Having uniform strength in all directions
    (D) Having maximum tensile strength along the lines of slag distribution

8. Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?
    (A) Emissivity of pipe surface
    (B) Diameter & length of the pipe
    (C) Temperature of hot pipe surface & that of air in the room
    (D) None of these

9. Cast iron contains __________ percent carbon.
    (A) 2.5
    (B) 3.75
    (C) 4.75
    (D) 5.25

10. Blast furnace slag is mainly molten
    (A) Sand
    (B) Magnesium silicate
    (C) Calcium silicate
    (D) Iron pyrite

11. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
    (A) Grashoff number
    (B) Grashoff number & Reynolds number
    (C) Reynolds number
    (D) Grashoff number & Prandtl number

12. Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
    (A) Wet bulb
    (B) Dry bulb
    (C) Saturation
    (D) Dew point

13. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.
    (A) Hot rolled mild
    (B) Cold rolled mild
    (C) Forged
    (D) Machinable stainless

14. Speisses is a mixture of the following:
    (A) Arsenides of heavy metals
    (B) Antimonides of heavy metals
    (C) Arsenides & antimonides of heavy metals
    (D) Iron, cobalt and nickel

15. Wrought iron does not have
    (A) Uniform strength in all directions
    (B) Ability to hold protective coating
    (C) High ductility & corrosion resistance
    (D) Easily weldable characteristics

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