Online Chemical Engineering Test - Chemical Engineering Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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A mono pump is a __________ pump.

centrifugal

piston

positive acting rotary

a group of vacuum

[#]

For separation of sugar solution from settled out mud, we use a __________ filter.

sparkler

plate and frame

centrifugal

rotary drum vaccum

[#]

A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is

125

133

150

160

[#]

Maximum heat transfer rate is achieved in __________ flow.

co-current

counter-current

turbulent

laminar

[#]

A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are k_A and k_B and the specific heat capacities are C_PA and C_PB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when

C_PA > C_PB

C_PA < C_PB

k_A < 0.5k_B

k_A>2 k_B

[#]

The catalytic cracking of heavier petroleum fraction is done to produce mainly

gasoline

asphalt

diesel oil

tar

[#]

The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives

low pressure drop and high hold up.

high pressure drop and low hold up.

low pressure drop and low hold up.

high pressure drop and high hold up.

[#]

The necessary and sufficient condition for equilibrium between two phases is

the concentration of each component should be same in the two phases.

the temperature of each phase should be same.

the pressure should be same in the two phases.

the chemical potential of each component should be same in the two phases.

[#]

Which of the following identities can be most easily used to verify steam table data for superheated steam.

(∂T/∂V)_S = (∂p/∂S)_V

(∂T/∂P)_S = (∂V/∂S)_P

(∂P/∂T)_V = (∂S/∂V)_T

(∂V/∂T)_P = -(∂S/∂P)_T

[#]

10.

Which of the following is not endothermic in nature ?

Combustion of sulphur.

Gasification of carbon.

Thermal cracking of fuel oil.

Steam reforming of naphtha.

[#]

11.

Brass container is suitable for storing

aqueous ammonia

beer

H₂SO₄(95%)

phosphoric acid (95%)

[#]

12.

For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell

decreases upwards.

increases upwards.

remains same throughout.

may decrease or increase upwards depending upon whether vacuum or positive pressure would be maintained inside the shell.

[#]

13.

Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

30°

45°

60°

75°

[#]

14.

Hearth furnaces are not used for

roasting

melting

reheating

none of these

[#]

15.

Buna-S is a __________ material.

fibrous

plastic

resinous

rubbery

[#]

16.

Which of the following is not a condensation polymer ?

Bakelite

Melamine polymer

Polymethylmethacrylate (PMMA)

None of these

[#]

17.

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

cold

work

age

induction

[#]

18.

Filler metal is used in __________ welding.

braze

electric spot

projection

seam

[#]

19.

L.D. (Linz-Donawitz) converter is used in the production of

copper

steel

zinc

aluminium

[#]

20.

For a fixed cross-sectional area, the most economical channel section has maximum

wetted perimeter.

fluid discharge rate.

fluid velocity.

depth of flowing fluid.

[#]

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