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- Question
In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is
Options- A. independent of the temperature.
- B. increased with the increase in pressure.
- C. decreased with the increase in pressure.
- D. unchanged by the pressure change.
- E. none of these
- Correct Answer
- decreased with the increase in pressure.
- 1. Degrees of freedom will be equal to the number of components for a system comprising of
Options- A. only soluble liquid components.
- B. partially miscible two liquid components system having two phases.
- C. two liquid components and one solute (soluble in both the liquids).
- D. none of these. Discuss
- 2. Internal energy change of a system over one complete cycle in a cyclic process is
Options- A. zero
- B. +ve
- C. -ve
- D. dependent on the path Discuss
- 3. __________ is not a polyester fibre.
Options- A. Terylene
- B. Dacron
- C. Nylon
- D. Polyacrylonitrite Discuss
- 4. Furnace aerodynamics is related to the __________ in the furnace.
Options- A. movement of gases
- B. measurement of flue gas volume
- C. temperature control
- D. pressure adjustment Discuss
- 5. Pick out the wrong statement.
Options- A. Insulating refractories used in place of regular refractory bricks are usually called light weight refractories, and they have similar composition as heavy bricks.
- B. Graphite refractories are also called plumbago refractories.
- C. Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28.
- D. Calcined magnesite is also called dead burnt magnesite. Discuss
- 6. Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called
Options- A. polyurethane
- B. silicone rubber
- C. teflon
- D. epoxy resin Discuss
- 7. Silica bricks are never used for lining the
Options- A. beehive coke ovens.
- B. by-product coke ovens.
- C. dome of blast furnace stoves.
- D. roof of open hearth furnace. Discuss
- 8. A gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c.
Options- A. 283
- B. 566
- C. 293
- D. 141.5 Discuss
- 9. Pick out the wrong statement.
Options- A. Hammer crushers operate by impact action.
- B. Standard screens have circular opening.
- C. With increase in mesh number of screens, their diameter in microns decreases.
- D. 200 mesh screen has 200 openings per linear cm. Discuss
- 10. Overfire burning in a furnace is a phenomenon characterised by
Options- A. supply of excess fuel.
- B. supply of excess air.
- C. burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air.
- D. none of these. Discuss
More questions
Correct Answer: only soluble liquid components.
Correct Answer: zero
Correct Answer: Nylon
Correct Answer: movement of gases
Correct Answer: Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28.
Correct Answer: teflon
Correct Answer: beehive coke ovens.
Correct Answer: 293
Correct Answer: 200 mesh screen has 200 openings per linear cm.
Correct Answer: burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air.
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