ESE Prelims 2022 Achievers Quiz 13

A reservoir has head of 40 m and a channel leading from the reservoir permits a flow rate of 34 m³/s. If the rotational speed of the rotor is 150 r.p.m., what is the power of the turbine? (Take g = 9.81 m/s²)

A 7.5 cm diameter jet of water strikes a curved plate at its centre with a velocity of 20m/s. The curved plate is moving with a velocity of 8 m/s  in the direction of the jet. The jet is deflected through an angle of 165°. By angle made by the relative velocity at the outlet of the plate?

Which of the following statements are correct about impulse turbines?

(i) It works at atmospheric pressure.

(ii) Relative velocity is nearly the same at the inlet and outlet.

(iii) It requires the use of a draft tube.

(iv) It works for high head and low discharge.

An inward flow reaction turbine has an inlet diameter 0.8 m. If the velocity of flow through the runner is constant and is equal to 1.2 m/s, calculate discharge through the runner, given that width of turbine at inlet is 150 mm.

Hydraulic efficiency of Francis turbine is

Which of the following are the qualities of a good highway pavement?

i. stable and non-yielding under load

ii. low rolling resistance

iii. high permeability

iv. comfortable riding surface

Which one of the following is NOT an advantage of flexible pavements?

Which of the following factors are considered in the design of a flexible pavement?

i. Wheel loads

ii. Subgrade Soil

iii. Strength of concrete

iv. Drainage

Which of the following are correct about the Group Index Method of design of flexible pavements?

i. GI value can have negative values

ii. Low GI means better soil

iii. Thickness of pavement is a function of GI

What will be the ratio of the vehicle damage factor for two axle loads of 24 kN and 18 kN. Assume standard load to be 8.2 kN.