Related Questions

A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.
A 45
B 60
C 80
D 95
Drop forging dies contain carbon of the order of
A 0.1 to 0.2%
B 0.25 to 0.5%
C 0.6 to 0.7%
D 0.7 to 0.9%
When your hard drive crashes from any of the correct selections in the question above, or from dropping it, it is known as head-to-disk interference, or HDL
A True
B FALSE
C loop backs (wrap plugs)
D sniffer
E None of the above
(b) Fill in the blanks with appropriate word. (i) The government is trying to prevent young boys from dropping ---- the school. (ii) ---- been delayed by the storm, I missed the train . (iii) You do not do it again --- again. (iv) I shall invite you --- one occasion. (v) A soft wind --- the ship gently back to harbor.
A (i) out (ii) As I had (III) and (iv) in (v) Pulled
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
A mercury is a metal.
B density of mercury is greater than that of water.
C cohesion of mercury is greater than its adhesion with glass.
D cohesion of water is greater than its adhesion with glass.
The ratio of the useful heat drop to the isentropic heat drop is called
A Condenser efficiency
B Nozzle efficiency
C Boiler efficiency
D Vacuum efficiency
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
A Convection becomes important
B Conduction becomes important
C Radiation becomes important
D Sub-cooled boiling occurs
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
A Mercury is a metal
B Density of mercury is greater than that of water
C Cohesion of mercury is greater than its adhesion with glass
D Cohesion of water is greater than its adhesion with glass

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