Basic Chemical Engineering Concepts - Set 50 - ObjectiveBooks

Basic Chemical Engineering Concepts - Set 50

Practice Test: Question Set - 50

1. The 'laughing gas' is
    (A) Nitrous oxide
    (B) Nitric oxide
    (C) Nitrogen trioxide
    (D) Nitrogen pentoxide

2. Natural water contains approximately __________ percent of heavy water.
    (A) 0.015
    (B) 0.71
    (C) 1.2
    (D) 3.5

3. Heat transfer by __________ is almost absent in case of fluidized bed drying operation.
    (A) Radiation
    (B) Conduction
    (C) Convection
    (D) Both (b) & (c)

4. If a solid is compressed adiabatically in its elastic range, its __________ remains constant
    (A) Internal energy
    (B) Enthalpy
    (C) Entropy
    (D) Temperature

5. What is the range of tempering temperature (°C) for most of the materials?
    (A) 75-100
    (B) 200-300
    (C) 350-450
    (D) 500-600

6. At absolute zero temperature, for any reaction involving condensed phases
    (A) Δ G° = 0, Δ H° = 0
    (B) Δ H° = 0, Δ S° = 0
    (C) Δ S° = 0, Δ E° = 0
    (D) Δ S° = 0, Δ Cp° = 0

7. Boiler draught of 10 mm water column is equivalent to
    (A) 1 kgf/m2
    (B) 10 kgf/m2
    (C) 10 kgf/mm2
    (D) 1 kgf/mm2

8. Insulation of liquid surface can be achieved by __________ on top of its surface.
    (A) Floating hollow polypropylene spheres
    (B) Spraying alumina powder
    (C) Putting cement
    (D) None of these

9. Surface tension of a liquid
    (A) Is due to intermolecular forces of cohesion
    (B) Decreases with rise in temperature
    (C) Is responsible for the spherical shape of an isolated liquid drop
    (D) All (a), (b) & (c)

10. The activity co-efficient of the solute in a dilute solution
    (A) Decreases with the increase of concentration of the solute
    (B) Increases with the increase of concentration of the solute
    (C) Remains constant
    (D) Is unity at infinite dilution

11. Gas turbine normally employs a constant __________ cycle.
    (A) Pressure
    (B) Temperature
    (C) Volume
    (D) None of these

12. __________ property of a material is determined by the Herbert Pendulum device.
    (A) Hardness
    (B) Tensile
    (C) Toughness
    (D) Compressive

13. Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
    (A) Diminishing balance
    (B) Sinking fund
    (C) Multiple straight line
    (D) Sum of the years digit

14. Pick out the wrong statement.
    (A) Molecules with symmetrical arrangements (e.g. CH4 or CCl4) are non-polar
    (B) Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do not ionize
    (C) Most of the hydrocarbons are non-polar
    (D) None of these

15. An example of unsteady non uniform flow is the flow of liquid under pressure through a
    (A) Tapering pipe at constant flow rate
    (B) Tapering pipe at either decreasing or increasing flow rate
    (C) Long pipeline of constant diameter
    (D) None of these

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