SSC JE Mechanical Engineering 27th Jan 2018 Shift-2
For the following questions answer them individually
A Pelton wheelwith single jet rotates at 600 rpm. The velocity of the jet from the nozzle is 100 m/s. If the ratio of the vane velocity of jet velocity is 0.44, whatis the diameter of the Pelton wheel?
A 1.0 m long modelofa ship is towed at a speed of 81 cm/s in a towing tank. To what speed of the ship, 64 m long doesthis correspond to?
The region between the separation streamline and the boundary surface of the solid body is known as
Forsimilarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal
In a single casing, multi-stage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by
If A and v stand for head and velocity and suffixes s,dand f for suction, delivery and friction, the manometric headof a centrifugal pump is equal to
A] $$h_s + h_d$$
B] $$h_s + h_d + h_f$$
C] $$h_s + h_d + h_f + \frac{v_s^2}{2g}$$
D] $$h_s + h_d + h_f + \frac{v_d^2}{2g}$$
The maximum efficiency of a Pelton wheel working under a constant head and discharge with the increase in power
The ratio of actual work available at the turbine to energy imparted to the wheelis called
