5911. Siderosis is a disease caused by the inhalation of __________ dust.
Coal
Silica
Iron
None of these
✅ The correct answer is option C.
Chemical Engineering
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5912. Thermal pollution due to excessive heat & temperature in the working place causes
Reduction in working efficiency of manpower
Fatigue
High breathing rate
All of the above
✅ The correct answer is option D.
5913. Which of the following air pollutants is not toxic to vegetation i.e., doesn’t cause vegetation damage?
Smog & ozone
Hydrogen fluoride & nitrogen oxides
Sulphur dioxide & spray of weed killers
Carbon monoxide
✅ The correct answer is option D.
5914. Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes
Poor visibility due to sky darkening
Irritation in eyes
Respiratory trouble
All of the above
✅ The correct answer is option D.
5915. Which of the following is a green house gas other than CO₂ ?
Methane
Nitrous oxide
Chlorofluro carbons (CFC)
All of the above
✅ The correct answer is option D.
5916. At a constant speed of the centrifugal pump . it __________ the impeller diameter.
Capacity varies directly with
Head varies as the square of
Horsepower varies as the cube of
All of the above
✅ The correct answer is option D.
5917. Which of the following flow measuring devices is an area meter?
Venturimeter
Orifice meter
Anemometer
Rotameter
✅ The correct answer is option D.
5918. In power law, ζ = A (du/dy)² + B , then the fluid is
Newtonian
Dilatant
Thixotropic
Rheopectic
✅ The correct answer is option A.
5919. Pick out the wrong statement pertaining to fluid flow.
The ratio of average velocity to the maximum velocity for turbulent flow of Newtonion fluid in circular pipes is 0.5
The Newtonion fluid velocity in a circular pipe flow is maximum at the centre of the pipe
Navier-Stokes equation is applicable to the analysis of viscous flows
Hagen-Poiseuille equation is applicable to the laminar flow of Newtonion fluids
✅ The correct answer is option A.
5920. One dimensional fluid flow implies the
Flow in straight lines only
Uniform flow
Steady uniform flow
Flow in which transverse components are zero
✅ The correct answer is option D.