Mechanical Engineering
2017 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE ME 2017 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 34–36 of 65. Imported answers require review unless explicitly marked reviewed.
Question 34
Open questionME-1NAT2 marksNeeds review
The pressure ratio across a gas turbine (for air, specific heat at constant pressure,
J/kg. K and ratio of specific heats,
) is 10. If the inlet temperature to the turbine is 1200 K and the isentropic efficiency is 0.9, the gas temperature at turbine exit is ______ K.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 35
Open questionME-1NAT2 marksNeeds review
Moist air is treated as an ideal gas mixture of water vapor and dry air (molecular weight of air = 28.84 and molecular weight of water = 18). At a location, the total pressure is 100 kPa, the temperature is 30 °C and the relative humidity is 55%. Given that the saturation pressure of water at 30 °C is 4246 Pa, the mass of water vapor per kg of dry air is ____________________ grams.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 36
Open questionME-1NAT2 marksNeeds review
Air contains 79% N
and 21% O
on a molar basis. Methane (CH
) is burned with 50% excess air than required stoichiometrically. Assuming complete combustion of methane, the molar percentage of N
in the products is _____________.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer