RPSC – Assistant – Conservator – of – Forest – Chemical – Paper – 2011
| Sr. No | Questions with multiple options |
| 1. | The equation of continuity applies to
(a) Incompressible fluids (b) Compressible fluids (c) Highly viscous fluids (d) Both incompressible and compressible fluids |
| 2. | Cavitation will not occur if the sum of the velocity and pressure heads at the suction is
(a) Zero (b) Much larger than the vapour pressure of the liquid (c) Much smaller than vapour pressure of the liquid (d) Equal to the vapour pressure of the liquid |
| 3. | In constant – pressure filtration,
(a) The filtrate flow rate is maximum at the start and decreases continuously to the end (b) The filtrate flow rate is minimum at the start and increases continuously to the end (c) The filtrate flow rate is constant throughout, (d) Increases slowly to a constant value |
| 4. | Monel is an alloy of
(a) Iron and silicon (b) Copper and chromium (c) Nickel and molybdenum (d) Copper and nickel |
| 5. | Which of the following metals is called metallic glass?
(a) Lead (b) Molybdenum (c) Tantalum (d) Titanium |
| 6. | A rotary drum filter is –
(a) A continuous vacuum filter (b) A discontinuous pressure filter (c) A continuous pressure filter (d) None of the above |
| 7. | The major material of construction in a soda ash plant is
(a) Cast iron (b) PVC (c) Graphite (d) Stainless steel |
| 8. | The corrosion resistance of stainless steel is due to the
(a) Function of a thin oxide film on the surface (b) Formation of graphite carbon on the surface (c) Formation of graphitic carbon on the surface (d) Formation of an inert Fe – c – Fe type complex chain (e) None of the following |
| 9. | The triple point of most fluids is close to
(a) Boiling point (b) Melting point (c) Critical point (d) None of these |
| 10. | The chemical potential of a species is an ideal solution depends on
(a) Temperature (b) Pressure (c) Composition of solution (d) All of these |
| 11. | A mixture of ideal gases is an ideal solution
(a) Never (b) Only at low pressure (c) Only at low pressure and temperature well above critical point (d) Always |
| 12. | Mercaptans present in light distillates are removed by extraction with
(a) Concentrated sulfuric acid solution (b) Concentrated phosphoric acid solution (c) Aqueous caustic soda solution (d) None of these |
| 13. | The operation which is employed for the removal of caffeine from coffee is
(a) Adsorption (b) Crystallization (c) Solvent extraction (d) Fractional distillation |
| 14. | Adsorption of a gas onto a solid
(a) Is an exothermic process (b) Is an endothermic process (c) Does not product any heat effect (d) May be exothermic or endothermic, depending on the system |
| 15. | Absorptivity for a blackbody is
(a) Zero (b) 0.5 (c) 1.0 (d) None of the above |
| 16. | In a fin tube heat exchanger,
(a) Only heat transfer area is augmented (b) Only heat transfer coefficient is augmented (c) Both heat transfer area and heat transfer coefficient are augmented (d) None of the above |
| 17. | For laminar flow of Newtonian fluids in pipes, the ratio of average velocity to maximum velocity is equal to
(a) 0.5 (b) 1.0 (c) 1.5 (d) 2.0 |
| 18. | Forces acting on a particle settling in fluid are
(a) Gravitational and buoyant forces (b) Centrifugal and drag forces (c) Gravitational or centrifugal, buoyant and drag forces (d) External, drug and viscous forces |
| 19. | Sedimentation of commercial scale occurs in
(a) Classifiers (b) Rotary drum filters (c) Thickeners (d) Cyclones |
| 20. | Material of construction for heat exchanger tubes handling sea water is
(a) Mild steel (b) Stainless steel (c) Cupro – nickel alloys (70 % Cu, 30 % Ni) (d) Aluminium |
| 21. | Which of the following plots is called Mollier diagram?
(a) h-s (b) h- P (c) T-s (d) None of these |
| 22. | Van-der Waal’s equation of state improved over the ideal gas equation of state with the following assumptions
(a) Infinitestimal molecular volume (b) No inter molecular force (c) Both (a) and (b) (d) None of the above |
| 23. | In which type of impeller used in liquid agitation, flow is coaxial?
(a) Turbine (b) Propeller (c) Paddle (d) None of these |
| 24. | Final control element is a
(a) Valve (b) Switch (c) Signal (d) None of these |
| 25. | In petroleum industry, which of the flow meters is normally used for heavy liquids characterized by high viscosity?
(a) Nutating disc meter (b) Orifice meter (c) Nozzle (d) Rotating vane/lobe meter |
| Data Collected By – K. Jeyanthi | |
| Published On – 14th Dec 2021 | |
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