a$)$ Data given below refers to twin jet Pelton wheel:

Powet

Gross head

Head lost in penstock

Speed

Velocity coefficient of nozzie

Overall efficiency

Blade deflection angle

Ratio of wheel velocity to jet velocity

Percentage loss in relative velocity

Determine :$-$

$=6000kW$

$=250m$

$=10m$

$=360rpm$

$=0\mathrm{.}98$

$=85\%$

$=165$

$=0\mathrm{.}46$

$=10$

$($i$)$ Diameter of jet and wheel

$($ii$)$ Hydraulic efficiency

$($iii$)$ Work done per kg of water

$($iv$)$ Power not utilized and going as waste with the discharge