Online Chemical Engineering Test - Process Equipment and Plant Design Test

Instruction:

This is a FREE online test. Beware of scammers who ask for money to attend this test.
Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
DO NOT refresh the page.
All the best!

In case of a continuous distillation column, increase in reflux ratio may result in the

lower fixed charges for the column.

greater cost for the reboiler heat supply.

greater cost for the condenser coolant.

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

[#]

The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the

equal sized reactors are the best.

smaller reactor should come first.

larger reactor should come first.

none of these.

[#]

The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

-q

-q/(1-q)

-q/(q-1)

none of these

[#]

Pick out the wrong statement:

The tensile strength of a brittle material is less than its compressive strength.

The compressive strength of a ductile materia] is less than its tensile strength.

In a thick cylindrical shell, the hoop stress is maximum at the inner radius.

The value of crushing load is more than that of buckling load for long colmns.

[#]

At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

increases

decreases

remains same

may increase or decrease depending upon the solubility of the gas in the liquid

[#]

Pick out the wrong statement

In a flanged and standard dished head, the crown radius is ≤ shell outside diameter.

In a flanged and shallow dished head, the crown radius is > shell outside diameter.

Flat head covers are most suitable for larger vessels operating at very high pressure.

Flanged only head is a type of flat head in which gradual change in the shape at the centre results in reduced local stresses.

[#]

Pick out the wrong statement pertaining to the design of a horizontal tube evaporator.

It is unsuitable for concentrating those liquids, which form a scale or deposit salt.

It is suitable for process, in which the final product is a liquor instead of solid.

Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres.

Liquor flows inside the tube, while the steam is outside submerging the tube.

[#]

In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement

results in higher shell side pressure drop.

can accomodate less number of tubes for a given shell diameter.

facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell side fluid.

creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer co-efficient.

[#]

Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger.

The corrosive and fouling fluid should be preferably routed through the tubes.

The viscous fluid should be routed through the shell side.

Lower flow rate fluid should be routed through the shell side.

Higher pressure fluid stream should be routed through the shell side.

[#]

10.

In shell and tube heat exchangers, straight tie rods are used to

hold baffle in space.

fix the tubes in position.

account for thermal strain.

none of these.

[#]

11.

An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

an increase in liquid viscosity.

an increase in relatived volatility for rectification columns.

decrease in gas solubility for absorbers.

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

[#]

12.

Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to

G^0.2

G^0.5

G^0.8

G^1.5

[#]

13.

What is the slope of the operating line in the stripping section of a distillation column ?

∞

> 1

< 1

[#]

14.

For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.

1 to 1.5

2.5 to 3.5

4 to 5

6 to 8

[#]

15.

What is the slope of the operating line in the rectifying section of a distillation coloumn ?

∞

> 1

[#]

16.

Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

same

less

about 3 times

about 0.33 times

[#]

17.

Joint efficiency (J) for a seamless pipe is

0.85

1.2

< 0.5

[#]

18.

Back-trapping in a distillation column results due to

low gas velocity.

high gas velocity.

excessive liquid gradient over the tray.

low reflux ratio.

[#]

19.

Liquid gradient over a tray can be minimised by

providing a higher skirt clearance or a higher weir.

decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must flow.

using split flow, radial flow or cascade flow for column diameter large than 4 ft.

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

[#]

20.

Pick out the wrong statement.

Lug supports are less expensive than other type of supports.

A pipe is differentiated from a tube by the fact that a pipe has a greater wall thickness compared to the tube.

A reducer is used to change the direction of a pipe in a straight run.

The method of fixing tubes to a tube sheet by expanding is called 'tube rolling'.

[#]

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers

Online Chemical Engineering Test - Process Equipment and Plant Design Test

Marks : 2/20

Test Review : View answers and explanation for this test.

Current Affairs

Interview Questions

Group Discussions