4 strokes engine have a lower thermal efficiency than 2 stroke engine.

Related MCQs

• Calculate the work done per minute by a punch tool making 20 working strokes per min when a 30 mm diametre hole is punched in 5 mm thick plate with ultimate shear strength og 450 Mpa in each stroke.
• For the given data of an Internal combustion engine : Mass of parts = 180 kg bore = 175 mm, length of stroke = 200 mm, engine speed = 500 r.p.m., length of connecting rod = 400 mm and crank angle = 60° from T.D.C, find the inertia force.
• In the turning moment diagram of a multicylinder engine, the work done during exhaust stroke is by  
• Work produced by the 4-stroke engine is less because  
• Piston effort acts along the line of stroke.
• The relation between stroke punch s and radius of crank r is  
• If the stroke punch is 100mm, find the radius of the crank in mm.
• Compression stroke results in  
• In a Porter governor, the balls are attached to the extension of lower links.
• The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a right turn. The effect of gyroscopic couple acting on it will be to raise the stern and lower the bow.