SSC JE Mechanical Engineering 27th Jan 2018 Shift-2

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 flow which neglects changesin a transverse direction is known as

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

The specific speed of turbine is defined as the speed of a unit

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