UPPSC AE (CE) Quiz 2

If the surface tension at the air-water interface is 0.078 N/m, estimate the pressure difference between inside and outside of an air bubble of diameter 0.015mm in water.( Considering outside pressure as atmospheric)

A 1 hr rainfall of 10 cm magnitude at a certain station has a return period of 50 years. The probability that a 1 hr rainfall of magnitude 10 cm or more will occur in each two successive years is:

Calculate the capillary effect in mm in a glass tube of 4 mm diameter, when immersed in mercury. The temperature of the liquid is 20⁰ C and the value of surface tension of mercury at 20⁰C in contact with air is 0.57 N/m respectively. The angle of contact for mercury is 130⁰.

If the specific retention is 10 % and the specific yield of the 100 km² alluvial basin is 0.15. What is the porosity of the soil?

A liquid compressed in a cylinder has a volume of 1000 cm³ at 2MN/m² and a volume of 993 cm³ at 3.3 MN/m². What is the bulk modulus of elasticity?

At Delhi, a maximum rainfall depth of 15 cm in 12 h has a return period of 50 years. The probability of a 12 h rainfall of magnitude equal to or greater than 15 cm will occur in the next year

Velocity component u = (λxy³ – x²y), v = xy² – 6y⁴, then the value of λ for possible flow field involving steady incompressible flow is

A direct runoff hydrograph due to an isolated storm was triangular in shape with a base of 60 hours and a peak of 100 m³/s. If the catchment area is 600 km², the effective rainfall of the storm is

Find SAR value of the given sample:

[Na⁺] = 345 mg/l , [Ca²⁺] = 60 mg/l , [Mg²⁺ ] = 18 mg/l