Power Engineeri...

Match List-I with List-II and choose the correct option.

List – I                                                                  List – II

A)  Pelton turbine                                1.  Low head, high discharge

B)  Francis turbine                              2.  Medium head, medium discharge            

C)  Kaplan turbine                               3.  High head, low discharge 

In a gas turbine cycle, the turbine output is 600 kJ/kg, the compressor work is 400 kJ/kg, and the heat supplied is 1000 kJ/kg. the thermal efficiency of the cycle is:

A turbine develops 7223 kW power under a bead of 25 m at 135 rpm. The specific speed of the turbine will be nearly

The minimum and maximum temperatures in gas turbine cycle are 900 K and 1600 K respectively. The maximum possible work output is (kJ/kg) ____

(C_p = 1.005 kJ/kg.K)

A horizontal jet of water of cross-sectional area 2 cm² and velocity 10 m/s strikes a vertical plate moving towards the jet at 3 m/s. The force exerted by the jet on the plate is

In a two-stage reciprocating air-compressor with suction pressure of 2 bar and delivery pressure of 8 bar, the ideal intercooler pressure will be

A pump work against a head of 30 m while the one-third scale model is tested at head of 10 m and 600 rpm. The rated speed of actual pump (in rpm) is _______

The absolute atmospheric and vapour pressure at the location of a reaction turbine are 100 kPa and 25 kPa respectively. The net effective head of water is 10 m. Thoma’s cavitation index is 0.95. Assume specific weight of water as 10 kN/m³. The location of turbine setting w.r.t. tail race to avoid cavitation is___

A model turbine produces 0.5 kW under 4m head and runs at 780 rpm. The large turbine has to work under 49 meters head of water and produces 1.4 MW. The model scale ratio (D_p: Dm) approximately is _____     [D_p= diameter of prototype, D_m= diameter of model]

In a Pelton wheel turbine, the ratio of the mean bucket speed to jet velocity is 60% that for the maximum efficiency. For shockless entry of fluid that is defected by 165°, the efficiency in % is ______.

A centrifugal compressor develops a pressure ratio of 5 and air consumption of 30 kg/s. The inlet temperature and pressure are 15°C and 1 bar respectively. For an isentropic efficiency of 0.85, the power required by the compressor will be nearly

In a Rankine power plant, dry saturated steam is supplied at 1.6 MPa. The condenser pressure is 0.3 bar and following data is obtained.

At 1.6MPa: Saturation Temperature = 198.27℃, Enthalpy = 2800 kJ/kg, Entropy = 6.5302 kJ/kgK

At 0.3 bar: Saturation temperature = 65.9 ℃, h_f = 218.2 kJ/kg, h_fg = 2300 kJ/kg, s_f = 1.026 kJ/kgK, s_fg = 6.6438 kJ/kgK

A reciprocating compressor has clearance volume 7 % of total volume. The expansion and compression indices are 1.36 and 1.30 respectively, then the maximum pressure ratio that can be obtained is _______