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- Question
Thermoplastic resins usually
Options- A. remain hard as long as they are hot.
- B. can not be reclaimed from waste.
- C. permanent setting resins.
- D. less brittle than thermosetting resins.
- Correct Answer
- less brittle than thermosetting resins.
- 1. Antioxidants are added in petrol to
Options- A. impart colour to it, for easy identification.
- B. minimise the gum formation.
- C. prevent icing of the carburettor.
- D. prevent the lead build up in engines. Discuss
- 2. The transfer function of a process is
. If a step change is introduced into the system, then the response will be
Options- A. under damped
- B. critically damped
- C. over damped
- D. none of these Discuss
- 3. Dead zone is the
Options- A. same as time constant.
- B. same as transportation lag.
- C. maximum change in the variable that does not change the reading of the instrument.
- D. none of these. Discuss
- 4. For gasoline, the flash point (<50°C) is determined by the
Options- A. Abel apparatus.
- B. Pensky-Marten's apparatus.
- C. Saybolt chromometer.
- D. none of these. Discuss
- 5. The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be
Options- A. basic
- B. more acidic
- C. neutral
- D. of the same acidity Discuss
- 6. Which of the following is the costliest material of construction used in pressure vessel construction?
Options- A. Low alloy steel
- B. Lead
- C. Titanium
- D. High alloy steel Discuss
- 7. Decarburisation of steel
Options- A. is the removal of carbon from iron carbide (Fe3C).
- B. affects its crystalline structure.
- C. is favoured by CO2.
- D. all (a), (b) and (c). Discuss
- 8. Cast iron has very high
Options- A. compressive strength
- B. ductility
- C. shock resistance
- D. resistance to brittleness Discuss
- 9. Pick out the correct statement.
Options- A. A forced vortex occurs when fluid rotates as a solid about an axis.
- B. In laminar flow, Newton's law of viscosity does not apply.
- C. A free vortex occurs, when fluidrotates as a solid.
- D. In turbulent flow, there are neither cross-currents nor eddies. Discuss
- 10. Functional depreciation of an equipment is the measure of decrease in its value due to its
Options- A. ageing
- B. wear and tear
- C. obsolescence
- D. breakdown or accident Discuss
More questions
Correct Answer: minimise the gum formation.
Correct Answer: under damped
Correct Answer: maximum change in the variable that does not change the reading of the instrument.
Correct Answer: none of these.
Correct Answer: basic
Correct Answer: Titanium
Correct Answer: all (a), (b) and (c).
Correct Answer: compressive strength
Correct Answer: A forced vortex occurs when fluid rotates as a solid about an axis.
Correct Answer: obsolescence
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