Process Equipment and Plant Design MCQs

Question 1

Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around

Accepted Answer

0.5"

Answer

2.5"

Answer

5"

Answer

50% of the plate spacing

Question 2

Heat transfer co-efficient, h G (K cal /hr.m 2 .°C) and mass velocity of air, G (kg/hr.m 2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as h G = 0.0176 G 0.8 . But when the flow of air perpendicular to the surface is encountered, this equation changes to

Accepted Answer

h G = 1.004 G 0.37

Answer

h G = 1.004 G 0.8

Answer

h G = 0.0176 G 0.37

Answer

h G = 0.0176 G 1.37

Question 3

In case of design of a shell and tube heat exchanger,

Accepted Answer

All of the above

Answer

Minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch

Answer

Minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto 15 mm tube diameter; and for > 15 mm tube diameter, tube sheet thickness is smaller than tube diameter

Answer

O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres

Question 4

In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

Accepted Answer

> 10

Answer

< 10

Answer

> 20

Answer

30

Question 5

Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

Accepted Answer

More

Answer

Less

Answer

Same

Answer

Either A or B; no generalisation can be made

Question 6

Joint efficiency (J) for a seamless pipe is

Accepted Answer

1

Answer

0.85

Answer

1.2

Answer

< 0.5

Question 7

Frame thickness in the plate and frame filter press is normally in the range of __________ inches.

Accepted Answer

0.25 to 8

Answer

0.25 to 4

Answer

1 to 5

Answer

1 to 12

Question 8

Hold up of material in a operating rotary drier is in the range of

Accepted Answer

0.05 to 0.15

Answer

0.25 to 0.50

Answer

0.5 to 0.8

Answer

0.8 to 0.9

Question 9

A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design

Accepted Answer

Irrespective of the shape of the vessel

Answer

Only if the opening is on spherical vessel

Answer

Only if the opening is on a vertical cylinderical vessel

Answer

Only if the opening is on a horizontal cylinderical vessel