Related Questions

A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
A Remain horizontal
B Slant up towards direction of pull
C Slant down towards direction of pull
D None of the above
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
A disc is a spinning with an angular velocity $$\omega $$ rad/s about the axis of spin. The couple applied to the disc causing precession will be (where $$I$$ = Mass moment of inertia of the disc and $$\omega {\text{P}}$$  = Angular velocity of precession of the axis of spin)
A $$\frac{1}{2}I{\omega ^2}$$
B $$I{\omega ^2}$$
C $$\frac{1}{2}I\omega \omega {\text{P}}$$
D $$I\omega \omega {\text{P}}$$
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
Gas carrying pipelines are best joined by
A Nuts & bolts
B Rivetting
C Welding
D None of these
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
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

Next steps