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- Question
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
Options- A. emf produced is very low of the order of microvolt.
- B. embrittlement of iron occurs.
- C. rusting of iron takes place.
- D. both (b) and (c).
- Correct Answer
- both (b) and (c).
- 1. Which of the following is the most suitable for extraction in a system having very low density difference?
Options- A. Mixer-settler extractor
- B. Centrifugal extractor
- C. Pulsed extractor
- D. Packed extraction tower Discuss
- 2. Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?
Options- A. Sieve plate column
- B. Bubble cap column
- C. Randomly packed column
- D. Wetted wall column Discuss
- 3. A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternery system containing twopairs of partially miscible liquids?
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 4. Which is the most suitable fertiliser for paddy?
Options- A. CAN
- B. Ammonium sulphate
- C. Ammonium nitrate
- D. Superphosphate Discuss
- 5. Which is a catalyst promoter used in catalytic ammonia synthesis reaction?
Options- A. Al2O3
- B. Cr2O3
- C. K2O
- D. MnO Discuss
- 6. Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha?
Options- A. 1.5:1
- B. 3.5:1
- C. 10:1
- D. 15:1 Discuss
- 7. N2 content in a urea sample was found to be only 42%. What is the actual urea content of the sample? (molecular weight of urea = 60)
Options- A. 80%
- B. 90%
- C. 95%
- D. 98% Discuss
- 8. Which of the following is not a colligative property?
Options- A. Osmotic pressure
- B. Depression of freezing point
- C. Lowering of vapor pressure
- D. none of these. Discuss
- 9. Which of the following is a thermodynamic property of a system?
Options- A. Concentration
- B. Mass
- C. Temperature
- D. Entropy Discuss
- 10. A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?
Options- A. Vapor compression cycle using expansion valve.
- B. Air refrigeration cycle.
- C. Vapor compression cycle using expansion engine.
- D. Carnot refrigeration cycle. Discuss
More questions
Correct Answer: Centrifugal extractor
Correct Answer: Wetted wall column
Correct Answer: 0
Correct Answer: Ammonium sulphate
Correct Answer: K2O
Correct Answer: 3.5:1
Correct Answer: 90%
Correct Answer: none of these.
Correct Answer: Entropy
Correct Answer: Carnot refrigeration cycle.
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