Related Questions

Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is
A Black
B Silver grey
C Green
D Yellow
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
Disc compensators are provided in large diameter fuel gas carrying pipelines to
A Keep the pipe in proper orientation
B Make the pipe joint leak-proof
C Account for contraction/expansion of pipe due to temperature changes of the surroundings
D Account for the pressure variation side the pipeline
Water hammer is caused in steam carrying pipelines, because of
A Partial condensation of steam
B Vibration of the pipeline
C High degree of superheat of steam
D Its exposure to torrential rain
Identification of pipelines carrying different liquids and gases is done by the __________ of the pipe.
A Diameter
B Colour
C Altitude
D None of these
Which of the following is the most widely used heat insulating material for pipelines carrying steam?
A Tar dolomite bricks followed by asbestos
B Fireclay refractory followed by aluminium sheet
C Cotton followed by aluminium foil
D 85% magnesia cement and glass wool
Steam traps are provided in steam carrying pipelines to
A Condense steam
B Release excess steam pressure by bleeding steam
C Remove condensate and inert gases
D None of these
Oxygen carrying pipelines in chemical industries are coloured with __________ colour.
A Yellow
B Black
C Blue
D Red
Fresh water carrying pipelines in chemical industries are coloured with __________ color.
A Sea green
B Brown
C Yellow
D Red
Fire in fuel gas pipelines is extinguished most effectively by
A Spraying water
B Blanketting the area with nitrogen atmosphere
C Fire fighting foam
D None of these

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