In a single effect evaporator, the economy is________________?
In a single effect evaporator, the economy is________________?
A. 1
B. < 1
C. > 1
D. None of these
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Absorptivity and reflectivity of a perfect black body are respectively _______________?
Absorptivity and reflectivity of a perfect black body are respectively _______________?A. 1 and 0
B. 0 and 1
C. 1 and ∞
D. 0 and 0.5During crystallisation, formation of crystal can occur in ______________ solution only?
During crystallisation, formation of crystal can occur in ______________ solution only?A. Saturated
B. Supersaturated
C. Under-saturated
D. All A., B. and C.Radiation energy is emitted by all the substances, which are above____________________?
Radiation energy is emitted by all the substances, which are above____________________?A. 0°K
B. 0°C
C. 100°C
D. Room temperatureIndirect contact heat exchangers are preferred over direct contact heat exchangers, because_________________?
Indirect contact heat exchangers are preferred over direct contact heat exchangers, because_________________?A. Heat transfer co-efficient are high
B. There is no risk of contamination
C. There is no mist formation
D. Cost of equipment is lowerIn the equation Q = UAΔt; Δt is_________________________?
In the equation Q = UAΔt; Δt is_________________________?A. Geometric mean temperature difference
B. Arithmetic mean temperature difference
C. Logarithmic mean temperature difference
D. The difference of average bulk temperatures of hot and cold fluids1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is__________________?
1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is__________________?A. 520
B. 200
C. 400
D. 500