PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around

3.5

1.5

0.5

2.5

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower?

Size, shape, orientation and surface of the packing particles

Fluid flow rates

Density and viscosity of fluids

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Seamless pipe is made

By forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing

Both B and C

From rolled strips formed into cylinders and seam-welded

By extrusion & casting into static and centrifugal molds

TRUE ANSWER : ?
YOUR ANSWER : ?

Cooling water fouling factors vary in the range of 0.001 to 0.003

(BTU/hr.ft² . °F)⁻¹

(W/m².°K)⁻¹

(kcal/hr.m² .°C)⁻¹

(kcal/hr. m. °C)⁻¹

TRUE ANSWER : ?
YOUR ANSWER : ?

The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

pd/4t

pd/8t

pd/t

pd/2t

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in gas flow rate to fabric surface area ratio (Nm³/hr/m² fabric surface area), the size & the cost of a bag filter

Decreases

Remain unaffected

None of these

Increases

TRUE ANSWER : ?
YOUR ANSWER : ?

Le/D for fully open gate valves would be

Much less (say 2% than that for fully open globe valves)

Around 7

Much more than that for fully open globe valves

Both B and C

TRUE ANSWER : ?
YOUR ANSWER : ?

In the agitators, the power required will be changed with the increase of diameter of agitator (D) as

D²

D⁵

D

D⁹

TRUE ANSWER : ?
YOUR ANSWER : ?

The main purpose of providing stepping on the trays is to

Decrease the pressure drop

Facilitate handling of large flow rate of liquid

Increase the residence time

Improve the flow condition

TRUE ANSWER : ?
YOUR ANSWER : ?

For high pressure process equipments/vessels, the connected nozzle should be

Welded

Screwed

Flanged

Brazed

TRUE ANSWER : ?
YOUR ANSWER : ?