Online Chemical Engineering Test - Chemical Engineering Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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In case of a rotameter, the density of the float material is __________ that of the liquid it replaces.

more than

less than

equal to

either (a) or (b)

[#]

For pipes that must be broken at intervals for maintenance, the connector used should be a/an

union

tee

reducer

elbow

[#]

For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.

sodium chloride

sodium carbonate monohydrate

anhydrous sodium sulphate

hypo

[#]

Varnish does not contain

thinner

pigment

both (a) & (b)

neither (a) nor (b)

[#]

Yellow phosphorus is transported under

air

water

nitrogen

helium

[#]

Vacuum is generally maintained in the vapour space of an evaporator mainly to

get economical temperature difference by using moderate pressure steam.

facilitate forward feeding in multiple effect evaporation.

concentrate heat sensitive materials.

achieve very high concentration of the final product.

[#]

In saturated gas, the

vapour is in equilibrium with the liquid at the gas temperature.

vapour is in equilibrium with the liquid at the room temperature.

partial pressure of vapour equals the vapour pressure of the liquid at room temperature.

none of these.

[#]

Which of the following equations is used for the prediction of activity co-efficient from experiments ?

Van Laar equation

Margules equation

Wilson's equation

all (a), (b) and (c)

[#]

What is the order of a chemical reaction,

, if the rate of formation of 'C', increases by a factor of 2.82 on doubling the concentration of 'A' and increases by a factor of 9 on trebling the concentration of 'B'?

7/2

7/4

5/2

5/4

[#]

10.

Combustion of pulverised coal as compared to that of lump coal

develops a non-luminous flame.

develops a low temperature flame.

can be done with less excess air.

provides a lower rate of heat release.

[#]

11.

For long flame and easy ignition, the coal used should have

high volatile matter

low ash

high calorific value

high ash

[#]

12.

Softness of silver can be converted into hardness by alloying it with small quantity of

copper & nickel

zinc

aluminium

tin

[#]

13.

Which of the following is the most prone to atmospheric corrosion ?

Silver

Iron

Tin

Copper

[#]

14.

Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the

ultimate stress to breaking stress.

ultimate stress to working stress.

working stress to ultimate stress.

none of these.

[#]

15.

Furnace aerodynamics is related to the __________ in the furnace.

movement of gases

measurement of flue gas volume

temperature control

pressure adjustment

[#]

16.

The velocity at which individual particles from a fluidised bed are carried away by the fluid passing through it, is defined as the

minimum fluidisation velocity.

terminal velocity.

elutriation velocity.

superficial velocity.

[#]

17.

At absolute zero temperature, for any reaction involving condensed phases

Δ G° = 0 , Δ H° = 0

Δ H° = 0 , Δ S° = 0

Δ S° = 0 , Δ E° = 0

Δ S° = 0 , Δ C_p° = 0

[#]

18.

Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.

parting

synthetic

loam

dry

[#]

19.

Methyl orange indicator turns

orange yellow in alkaline medium.

orange yellow in acidic medium.

colourless in acidic medium.

colourless in basic medium.

[#]

20.

Out of the following, which will fracture most readity, when hit with a hard hammer ?

Brass

Bronze

German silver

Cast iron

[#]

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