Time Left - 15:00 mins
GATE 2020: Thermodynamics Quiz 11 (App update required to attempt this test)
Attempt now to get your rank among 900 students!
Question 1
The back work ratio in Rankine cycle is __________, if WP and WT are pump work and turbine work respectively.
Question 2
In a gas turbine power plant, reheating of gases between high pressure and low pressure turbine stages will
Question 3
An ideal brayton cycle without regeneration has pressure ratio of 6. Air inlet to compressor is 0.1MPa and 30OC. The maximum temperature that can be attained in a cycle is 900oC.The compressor and turbine efficiencies are 0.9 and 0.95 respectively. Heat supplied per kW of output obtained____________?
Question 4
A close cycle of gas turbine plant operating on Brayton cycle between 27 °C and 927 °C with a pressure ratio of 5 and air-fuel ratio is 60. Compressor efficiency is 80% and combustion loss is 10% of heating value. What will be the calorific value (in kJ/kg) of fuel?
[Take Cp = 1.005 kJ/kgK]
[Take Cp = 1.005 kJ/kgK]
Question 5
Steam enters a turbine at 30 bar, 300 °C (u = 2750 kJ/kg, h = 2993 kJ/kg) and exits the condenser as saturated liquid at 15 kPa (u = 225 kJ/kg. h = 226 kJ/kg). Heat loss to the surrounding is 50kJ/kg of steam flowing through the turbine. Neglecting changes in kinetic energy and potential energy, the work output of the turbine (in kJ/kg of steam) is ________
Question 6
The steam is expanded isentropically in steam turbine from 20 bar, 350°C to 0.08 bar and then it condensed to saturated liquid water in condenser. The pump feeds back the water into boiler. Neglect losses in the processes, the cycle efficiency (in percentage) is
Given data: At P = 0.08 bar, hfg = 2403.1 kJ/kg, sfg = 7.6361 kJ/kg K, vf = 0.001008 m3/kg
h1 =3159.3 kJ/kg, s1 = 6.9917 kJ/kg K, h3 = 173.88 kJ/kg, s3 = 0.5926 kJ/kgK,
Given data: At P = 0.08 bar, hfg = 2403.1 kJ/kg, sfg = 7.6361 kJ/kg K, vf = 0.001008 m3/kg
h1 =3159.3 kJ/kg, s1 = 6.9917 kJ/kg K, h3 = 173.88 kJ/kg, s3 = 0.5926 kJ/kgK,
- 900 attempts
- 2 upvotes
- 5 comments
May 18ESE & GATE ME
