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- Question
CaCO3 contains __________ percent of Ca by weight.
Options- A. 40
- B. 48
- C. 96
- D. 12
- Correct Answer
- 40
- 1. Suppose that the gain, time constant and dead time of a process with the following transfer function:Gc(s) = 10 exp( - 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as
Options- A. 8, 0.6, 0.08
- B. 12, 0.6, 0.12
- C. 8, 0.6, 0.12
- D. 12, 0.4, 0.08 Discuss
- 2. For a feed back control system to be stable, the
Options- A. roots of the characteristic equation should be real.
- B. poles of the closed loop transfer function should lie in the left half of the complex plane.
- C. Bode plots of the corresponding open loop transfer function should monotoni-cally decrease.
- D. poles of the closed loop transfer function should lie in the right half of the complex plane. Discuss
- 3. The __________ of a chemical company can be obtained directly from the balance sheet as the difference between current assets and current liabilities.
Options- A. cash ratio
- B. net working capital
- C. current ratio
- D. liquids assets Discuss
- 4. Dacron is a
Options- A. condensation polymerisation product of hexamethylene diamine and adipic acid.
- B. condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol.
- C. thermosetting material.
- D. none of these. Discuss
- 5. Pirani gauge is used for the measurement of
Options- A. very high pressure.
- B. high vacuum.
- C. liquid level under pressure.
- D. liquid level at atmospheric pressure Discuss
- 6. Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.
Options- A. N2
- B. KNO3
- C. NO2
- D. NHO3 Discuss
- 7. Colligative properties of a dilute solution are those which depend entirely upon the
Options- A. constitution of the solute.
- B. chemical composition of the solute.
- C. number of solute molecules contained in a given volume of the solvent.
- D. none of these. Discuss
- 8. __________ fuels require the maximum percentage of 'excess air' for complete combustion.
Options- A. Solid
- B. Liquid
- C. Gaseous
- D. Nuclear Discuss
- 9. Optimum reaction temperature in steam reforming of naphtha is __________ °C.
Options- A. 700 - 1000
- B. 300 - 450
- C. 1500-1700
- D. 100-200 Discuss
- 10. Natural gasoline is produced
Options- A. from oil wells
- B. in oil refineries
- C. by natural gas stripping
- D. none of these Discuss
More questions
Correct Answer: 12, 0.6, 0.12
Correct Answer: poles of the closed loop transfer function should lie in the left half of the complex plane.
Correct Answer: net working capital
Correct Answer: none of these.
Correct Answer: high vacuum.
Correct Answer: N2
Correct Answer: constitution of the solute.
Correct Answer: Solid
Correct Answer: 700 - 1000
Correct Answer: by natural gas stripping
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