a. the intake valve is closed and the exhaust valve is open
b. the intake valve is open and the exhaust valve is closed
c. both the intakeand the exhaust valves are closed
d. both the intake and exhaust valves are closed
2007-03-08 07:10:37 · 4 answers · asked by x_xcassandrax_x 1 in Cars & Transportation ➔ Other - Cars & Transportation
d
2007-03-08 07:19:44 · answer #1 · answered by Robert P 6 · 1⤊ 0⤋
Both closed - otherwise, there would be no significant compression, and the energy (the pressure increase) from the burning fuel would be pushed straight out past the open valve and not exerted onto the piston crown.
2007-03-08 07:30:51 · answer #2 · answered by Me 6 · 1⤊ 0⤋
If MOS is reffering to the moment of spark then both valves would be in the closed position in a four stroke motor.
2007-03-08 07:22:06 · answer #3 · answered by Anonymous · 0⤊ 0⤋
mos it truly is also familiar as moss is eco-friendly plant like stuff it truly is stumbled on turning out to be on the engine of previous autos. it truly is to not be wondered for rus it truly is often an oxidation of ferrous metals and seems orange brownish in colour
2016-12-05 10:24:08 · answer #4 · answered by ? 4 · 0⤊ 0⤋