Discussion
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- Question
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
Options- A. Cork
- B. Saw dust
- C. Sand
- D. Chemically prepared foam
- Correct Answer
- Sand
- 1. Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve)
Options- A. S2/S1
- B. S1/S2
- C. S1 - S2
- D. S1 x S2 Discuss
- 2. Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a
Options- A. thermocouple
- B. reistance thermometer
- C. mercury in glass thermometer
- D. vapor pressure thermometer Discuss
- 3. Roof of a basic electric furnace is made of __________ bricks.
Options- A. superduty fireclay
- B. silica
- C. chromite
- D. none of these Discuss
- 4. Foot valves provided in pumps are __________ valves.
Options- A. relief
- B. three/four way
- C. pressure reducing
- D. directional control Discuss
- 5. Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.
Options- A. < 2
- B. < 5
- C. < 8
- D. < 10 Discuss
- 6. What is the Laplace transform of impulse input having magnitude 'X'?
Options- A. X
- B. X2
- C. 1/X
- D. 1 Discuss
- 7. Which of the following expressions defines the Baume gravity scale for liquids lighter than water?
Options- A. °Be = (140/G) - 130
- B. °Be = 200(G-1)
- C. °Be = 145 - (145/G)
- D. °Be = (400/G) - 400 Discuss
- 8. Which is not an acidic refractory?
Options- A. Silica
- B. Fireclay
- C. High alumina refractory
- D. Carbon black Discuss
- 9. Which of the following is the best nuclear fuel?
Options- A. Np- 239
- B. U-234
- C. Pu-239
- D. Th-236 Discuss
- 10. Sulphuric acid mist is arrested by using a __________ scrubber.
Options- A. packed wet
- B. hollow wet
- C. venturi
- D. co-current Discuss
More questions
Correct Answer: S1/S2
Correct Answer: thermocouple
Correct Answer: silica
Correct Answer: directional control
Correct Answer: < 2
Correct Answer: 1
Correct Answer: °Be = (140/G) - 130
Correct Answer: Carbon black
Correct Answer: Pu-239
Correct Answer: venturi
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