The power output of an I.C. engine is measured by a rope brake dynamometer. The diameter of the brake pulled is 700 mm and the rope diameter is 25 mm. The load on the tight side of the rope is 50 Kg. Mass and spring balance reads 50 N. The engine running at 900 rev/min consumes fuel, of a calorific

Consider air standard Otto and Diesel cycles, both having the same state of the air at the start of compression. If the maximum pressure in both the cycles is the same, the compression ratio 'r' and the efficiency 'η' are related by ___ A. r(Diesel) > r(Otto) B. r(Diesel) < r(Otto) C. η(Otto) > η(Di

A large diesel engine runs on a 4-stroke cycle at 2000 rpm. The engine has a displacement of 25 liters and a brake mean effective pressure of 0.6 MN/m2. It consumes 0.018 kg/s of fuel (calorific value = 42000 kJ/kg). Determine the brake power and brake thermal efficiency.

In an ideal air-standard gas turbine cycle the minimum and maximum temperatures are respectively 310 K and 1100 K. Draw the cycle on a T-s diagram and calculate the optimal pressure ratio of the cycle for maximum work output. Assume for air ϒ-1/ϒ is 0.29 where ϒ is the ratio of specific heat.

What is the problem with cold starting?

What is turbocharging? What is effect of turbocharging on fuel efficiency? Does turbocharging uses more fuel?

Find the required air-fuel ratio in a gas turbine whose turbine and compressor efficiency are 85% and 80% respectively. The maximum cycle temperature is 875 C. The working fluid can be taken as air (cp = 1.00 kJ/kg.K and ϒ = 1.4) which enters the compressor at 1 atm and 27 C. The pressure ratio is 4

An IC engine has a bore and stroke of 2 units each. The area to calculate heat loss can be taken as ___ A. 4π B. 5π C. 6π D. 8π

The minimum pressure and temperature in an otto cycle are 100 kPa and 27 C. The amount of heat added to the air per cycle is 1500 kJ/kg. Determine the pressure and temperature at all points of the air standard otto cycle. Also, calculate the specific work and the thermal efficiency of the cycle for