Chemical Engineering Basics

121. Angular displacement can be measured suitably by a

1. Shaft encoder
2. Linear variable differential transducer (LVDT)
3. Stroboscope
4. Tachometer

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122. Annealing of cast iron

1. Softens it to facilitate machining
2. Decreases the free carbon
3. Increases the strength
4. None of these

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123. Annealing of white cast iron produces __________ iron.

1. Grey
2. Nodular
3. Malleable
4. Spheroidal

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124. As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

1. 110
2. 85
3. 60
4. 45

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125. As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.

1. Butt
2. Lap
3. Welded
4. None of these

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126. As the fluid flow rate increases, the float of the Rotameter

1. Rises in the tube
2. Rotates at higher speed
3. Rotates at lower speed
4. Drops down in the tube

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127. At 100% relative humidity, the dew point temperature of moist air is

1. Less than the wet bulb temperature
2. More than the wet bulb temperature
3. Equal to the wet bulb temperature
4. Equal to the ambient temperature

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128. At absolute zero temperature, for any reaction involving condensed phases

1. δ G° = 0 , δ H° = 0
2. δ H° = 0 , δ S° = 0
3. δ S° = 0 , δ E° = 0
4. δ S° = 0 , δ Cp° = 0

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129. At the point of boundary layer separation in fluid flow, the

1. Shear stress is maximum
2. Velocity gradient is flat
3. Density variation is maximum
4. Shear stress is zero

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130. Atomic __________ is a whole number for an element.

1. Number
2. Weight
3. Radius
4. None of these

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