Chemical Engineering Objective Questions and Answers pdf - Set 39 - ObjectiveBooks

Chemical Engineering Objective Questions and Answers pdf - Set 39

Practice Test: Question Set - 39

1. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
    (A) Borosilicate
    (B) High silica
    (C) Supermax
    (D) Lead

2. Out of the following __________ iron has the best capability to bear sudden & excessive shocks.
    (A) White
    (B) Cast
    (C) Wrought
    (D) Pig

3. Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
    (A) Cold
    (B) Work
    (C) Age
    (D) Induction

4. Which one is neutral in character?
    (A) N2O4
    (B) N2O
    (C) N2O5
    (D) N2O3

5. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
    (A) Length of the pipe
    (B) Diameter of the pipe
    (C) Density of the fluid
    (D) Velocity of the fluid

6. The normal stress is the same in all directions at a point in a fluid, only when the fluid
    (A) Is at rest & has zero viscosity
    (B) Is frictionless
    (C) Fluid layer has no motion relative to an adjacent layer of fluid
    (D) Is incompressible & frictionless

7. Softening of hardened steel is done by its
    (A) Normalizing
    (B) Tempering
    (C) Annealing
    (D) Carburizing

8. Hot extrusion of aluminium is done in the temperature range of __________ °C.
    (A) 550-600
    (B) 450-500
    (C) 350-400
    (D) 250-300

9. Potable water means the water used for
    (A) Fire-fighting
    (B) Cooling
    (C) Drinking
    (D) Evaporation to produce steam

10. Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm.
    (A) 10
    (B) 20
    (C) 30
    (D) 40

11. Which of the following gases cause global warming?
    (A) Carbon monoxide
    (B) Carbon dioxide
    (C) Nitrogen
    (D) Ozone

12. What is the pH of distilled water?
    (A) 0
    (B) 1
    (C) 7
    (D) 14

13. Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about
    (A) 9 : 1
    (B) 17 : 1
    (C) 23 : 1
    (D) 29 : 1

14. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as
    (A) Re0.5, Re0.8
    (B) Re0.8, Re-0.5
    (C) Re0.8, Re0.5
    (D) Re-0.8, Re0.5

15. Photographic plates are coated with
    (A) Silver nitrate
    (B) Silver halide
    (C) Calcium silicate
    (D) Metallic silver

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