Basic Chemical Engineering Interview Questions Answers pdf - Set 29 - ObjectiveBooks

Basic Chemical Engineering Interview Questions Answers pdf - Set 29

Practice Test: Question Set - 29


1. Steel balls are manufactured by
    (A) Sintering
    (B) Casting
    (C) Cold heading
    (D) Spinning

2. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
    (A) Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller
    (B) Maintaining vacuum on tube side is more difficult than that on the shell side
    (C) Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam
    (D) Condenser can act as a storage unit for condensed steam

3. __________ are normally subjected to sub-zero treatment.
    (A) Highly stressed parts
    (B) Gauges or precision parts
    (C) Cold rolled sheets
    (D) Non machinable materials

4. Pick out the wrong statement
    (A) Processing of thermosetting plastics is ideally done by injection moulding
    (B) Processing of thermoplastics is ideally done by compression moulding
    (C) Mass production of seamless pipes are done by electrical resistance welding (ERW)
    (D) Stretch forming is a process of cold drawing

5. In the blast furnace, incorporation of water vapor in the blast gives the following effect.
    (A) Increases the reducing potential of the gas
    (B) Increases the flame temperature
    (C) No significant change occurs
    (D) Increases the hydrogen content in the metal

6. Wood is a/an __________ material.
    (A) Amorphous
    (B) Cellular
    (C) Homogeneous
    (D) Granular

7. Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.

    A. Induced draft fan

    B. Economiser

    C. Air preheater

    D. Steam superheater 

Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories?

    (A) A, C, B, D
    (B) D, B, C, A
    (C) D, C, B, A
    (D) D, A, B, C

8. The product out from a cupola is called
    (A) Wrought iron
    (B) Pig iron
    (C) Cast iron
    (D) None of these

9. Induced draft fans provided in large thermal power plant boilers have __________ blades.
    (A) Forward curved
    (B) Backward curved
    (C) Double curved
    (D) Radial or straight

10. The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
    (A) 768
    (B) 1127
    (C) 1359
    (D) 1480

11. In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in meters is given by (where, temperature at sea level is 15°C and t is in °C.)
    (A) t = 15 - 0.0065 h
    (B) t = 15 + 0.0065 h
    (C) t = 0.0035 h - 15
    (D) t = 15 - 0.0035 h

12. Super conduction in metals is observed at a temperature of __________ °K.
    (A) < 100
    (B) > 100
    (C) About 273
    (D) About 373

13. Work done by a/an __________ process is determined by ∫p. dv
    (A) Adiabatic
    (B) Quasi-static
    (C) Isothermal
    (D) Isentropic

14. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.
    (A) Grey
    (B) Black
    (C) Opaque
    (D) White

15. Use of economizer in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.
    (A) 1
    (B) 10
    (C) 30
    (D) 50

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