- A. Cast iron
- B. Aluminium
- C. Mild steel
- D. Stainless steel
Chemical Engineering Basics
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No cutting fluid is normally used, while machining_____.
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For the irreversible reaction, Ca+ 2C = Ca C₂ , Δ H°298 = – 60000 J . mole⁻¹ . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be_____.
- A. 30000 J
- B. 60000 J
- C. 90000 J
- D. 240000 J
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Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the _____ draught.
- A. Natural
- B. Induced
- C. Forced
- D. Chimney
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With decrease in the grain size of a material, its creep resistance_____.
- A. Increases
- B. Decreases
- C. Remains constant
- D. Either A or B ; depends on the material
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The factor of safety for brittle materials (having elongation < 5%) is based on the _____ stress.
- A. Yield
- B. Proof
- C. Ultimate
- D. None of these
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Factor of safety is the ratio of the _____ stress to the working stress.
- A. Tensile
- B. Compressive
- C. Yield
- D. Bearing
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Pick out the correct statement.
- A. Jet engine can work, where there is no atmosphere
- B. Rocket engines cannot work, where there is no atmosphere
- C. Rocket engines carry oxygen required for the combustion in the form of oxidiser
- D. Jet engines also carry oxidiser
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Magnetic permeability of iron is increased by its_____.
- A. Decarburising
- B. Alloying with cobalt
- C. Purification
- D. Alternate heating & cooling
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Coarse grained steels have_____.
- A. Low toughness
- B. No tendency to distort
- C. High density
- D. Very high toughness
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Production of one ton of steel plate in a modern integrated steel plant in India consumes about _____ kWh of electricity.
- A. 50
- B. 250
- C. 450
- D. 850