Chemical Engineering Basics

821. Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?

1. E = 2G (1 + v)
2. E = G (1 + v)
3. E = G (1 + v)/2
4. E = 2G (1 + 2v)

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822. Which of the following terminology is used for the temperature at which new grains are formed in a metal?

1. Eutectic temperature
2. Lower critical temperature
3. Recrystallisation temperature
4. Upper critical temperature

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823. Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?

1. Elaiden test
2. Reichert-Meissl value test
3. Hunter value test
4. Iodine value test

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824. Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?

1. Output & fineness
2. Velocity
3. Both (A) & (B)
4. None of these

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825. Which of the, following is not associated with the functioning of a petrol engine?

1. Compression ignition system
2. Spark plug
3. Carburettor
4. Otto cycle

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826. Which one can be directly solidified from gaseous state without entering into liquid state?

1. Helium
2. Oxygen
3. Carbon dioxide
4. None of these

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827. Which one is neutral in character?

1. N₂O₄
2. N₂O
3. N₂O₅
4. N₂O₃

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828. Which one of the following is incombustible?

1. H₂
2. CCl₄
3. C₂H₂
4. S

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829. While the bin cards are used in the effective stores management, the queuing theory is associated with the __________ time.

1. Waiting
2. Idle
3. Inspection
4. Tool replacement

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830. While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

1. 1800
2. 2000
3. 2400
4. 3000

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