When a liquid is flowing through a pipe, the velocity of the liquid is
A. maximum at the centre and minimum near the walls
B. minimum at the centre and maximum near the walls
C. zero at the centre and maximum near the walls
D. maximum at the centre and zero near the walls
Answer A
A vessel of 4 m³ contains an oil which weighs 30 kN. The specific weight of the oil is
A. 4.5 kN/m³
B. 6 kN/m³
C. 7.5 kN/m³
D. 10 kN/m³
Answer C
Explanation: Sp.weight of oil = weight of the oil/volume of the vessel = 30/4. = 7.5KN/m³.
A structure used to dam up a stream or river over which the water flows is called
A. Orifice
B. Notch
C. Weir
D. Dam
The pressure at a point 4 m below the free surface of water is
A. 19.24 kPa
B. 29.24 kPa
C. 39.24 kPa
D. 49.24 kPa
Explanation:
Pressure= density*g*h. = 1000*9.81*4. = 39240 pascal or 39.2kpa.
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called
A. Density of liquid
C. Compressibility of liquid
B. Specific gravity of liquid
D. Surface tension of liquid
Answer B
