TEST YOUR KNOWEDGE IN CHEMICAL ENGINEERING by Khalid nawaz

1.

In chemical dehumidification process

A. wet bulb temperature increases.

B. dry bulb temperature remains constant.

C. dew point temperature increases.

D. dry bulb temperature increases

2.

What is the value of included angle of a triangular notch for maximum discharge?

A. 30°

B. 60°

C. 90°

D. 120°

3.

With increase in temperature, the surface tension of water

A. increases

B. decreases

C. remains constant

D. increases linearly

4.

__________ is the most important element, which controls the physical properties of steel.

A. Manganese

B. Silicon

C. Carbon

D. Vanadium

5.

Out of the following surfaces, the emissivity will be minimum for

A. aluminum foil

B. concrete

C. plaster

D. smooth glass

6.

Desalination of water

A. makes it potable.

B. makes it non-potable.

C. means distillation of water.

D. none of these.

7.

Probability of cavitation occurring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation

[A]. pressure falls below the vapor pressure

[B]. pressure becomes very high

[C]. temperature becomes low

[D].

all 'a', 'b' & 'c' @

8.

Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.

A. steel

B. lignite

C. water

D. lime stone

9.

Pick out the wrong statement.

A. Dry bulb temperature, wet bulb temperature & dew point are the same in case of saturated air.

B. Dew point is reached by cooling the humid air at constant moisture content.

C. Heating of humid air is done for its dehumidification.

D. none of these.

10.

Pressure exerted by a liquid depends upon its

A. surface tension

B. density

C. viscosity

D. buoyancy