Consider the following statements:
1. Mean piston speed is given by
2. Automobile engines operate at higher end of mean piston speed near to 15 m/s.
3. Large marine diesel operate at lower end of mean piston speed near to 8 m/s.
Which of these are correct?
Mean piston speed
All of followings are correct except: Inlet-valve mach index is dependent on
u = gas velocity through the inlet valve at smallest flow area
α = inlet sonic velocity
b = bore
Di = inlet valve diameter
Vp = mean piston speed
Ci = inlet valve average flow coefficient
The mechanical efficiency of a single-cylinder four-stroke engine is 80%. The frictional power is estimated to be 20 kW. What is the brake power developed by the engine?
Piston compression rings are made of
The minimum number of rings in a piston are
The leakage of gases between the walls of piston and cylinder is prevented by means of three to six cast iron rings which may be square or rectangular in cross-section.
The slotted grooves on oil rings for pistons help to
Match the List-I (IC engine parts) with List-il (Materials) following:
The top of the piston in two-stroke engine is
It is for scavenging of air.
Accumulation of carbon deposits on the cylinder head of an IC engine leads to increase in
The engine of a car has three cylinder with total displacement of 770 cc. The compression ratio is 8.7. What is the clearnace volume of each cylinder?
Clearance volume of each cylinder