Chemical Engineering Basics

601. The dimensional formula of bulk modulus of elasticity is same as that of the

1. Pressure
2. Density
3. Force
4. None of these

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602. The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

1. Wetness
2. Mass flow rate
3. Both 'a' & 'b'
4. Neither 'a' nor 'b'

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603. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T₁ - T₂)/T₁. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T₁ and T₂ is given by

1. T₁/(T₁-T₂)
2. T₂/(T₁-T₂)
3. T₁/T₂
4. T₂/T₁

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604. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

1. More
2. Equal
3. Less
4. Double

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605. The elastic strain in copper is due to the

1. Motion of dislocations
2. Stretching of atomic bonds
3. Breakage of atomic bonds
4. None of the above

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606. The emf of a Deniell cell “Zn | Zn²⁺ || Cu²⁺ | Cu” can be increased by

1. Decreasing the surface area of the electrodes
2. Increasing the concentration of zinc sulphate solution
3. Increasing the surface area of the electrodes
4. Increasing the concentration of copper sulphate solution

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607. The escape velocity of a body on earth which is independent of its mass is about __________ km/second.

1. 3
2. 7
3. 11
4. 15

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608. The excess air required for the combustion of pulverised coal is of the order of about __________ percent.

1. 5
2. 15
3. 30
4. 45

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609. The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.

1. Two
2. Four
3. Six
4. Eight

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610. The following thermocouple may be used for measuring temperature upto 1873°K.

1. Chromel-alumel
2. Copper-constantan
3. Platinum-platinum rhodium
4. Iron-constantan

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