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Process Equipment and Plant Design

Process Equipment and Plant Design
Which of the following lengths of heat exchanger tubes are normally not used in practice?

10 metres
2.5 metres
0.5 metre
6 metres

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Process Equipment and Plant Design
The buckling tendency of compression members is always in the direction of the

Perpendicular to the axis of the load
Least radius of gyration
Axis of the load
None of these

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Process Equipment and Plant Design
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.

Allowable
None of these
Damaging
Working

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Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 0.04/NRe0.16
f = 0.22 NRe0.05
f = 25/NRe
f = 16/NRe

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Process Equipment and Plant Design
What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?

Equal to tube O.D
6.5 cms
6.5 mm
Equal to tube I.D

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Process Equipment and Plant Design
Accidents in chemical plants are mostly due to

Improper layout of the equipments
Inadequate equipment design
Failure of equipments
Faulty operating procedures

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