Chemical Heat Transfer | Test For NTS PPSC FPSC, TEST

Pick out the wrong statement ?

A. ‘Solvates’ are chemical compounds formed by solute with their solvents. When water is the
solvent, then it is called a ‘hydrate’
B. In heat exchanger calculations (Δt) weighted is used in place of Δt, when it involves more
than one sequence of heating or cooling i.e., desuperheating & condensation or condensation
& sub-cooling
C. Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted
D. In case of short tube vertical evaporators, area of central downtake is about 50 to 100% of the
total tube cross-sectional area

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Category: Chemical Heat Transfer

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

A graph between _____________ is called Wilson plot?

In a heat exchanger, the rate of heat transfer from the hot fluid to the cold fluid___________________?

With increase in temperature, the thermal conductivity of most liquids_________________?

In Fourier’s law, the proportionality constant is called the______________________?

The rate of heat transfer from a vertical plate by natural convection depends upon the temperature differences (ΔT) between wall and outside bulk. The proportionality is given as______________?

Pick out the wrong statement ?

If h1 = inner film co-efficient and /h2 = outer film co-efficient, then the overall heat transfer co-efficient is________________?

In a single evaporator system, the steam economy ________________ by creating vacuum in the evaporator?

Trap is used to remove ________________ from steam pipe lines?