which engine have the high mechanical efficiency eighter 2
stroke engine or 4 stroke engine?




Answers were Sorted based on User's Feedback



Answer / santus.1985

4 Stroke engine

Is This Answer Correct ?    22 Yes 9 No

Answer / mirja shabaz beg

2 stroke engine

Is This Answer Correct ?    12 Yes 3 No

Answer / princekumar688

4 stroke engine?

Is This Answer Correct ?    13 Yes 5 No




Answer / ashish saxena

4 stroke engine

Is This Answer Correct ?    14 Yes 8 No

Answer / hariharan

in two stroke engine weight is less than 4 stroke efficiency.
so the 2 stroke engine is more efficiency

Is This Answer Correct ?    2 Yes 1 No

Answer / nihar vaghela

also in 2 stroke engine and fuel efficiency related so,their in 4 stroke more efficient...

Is This Answer Correct ?    0 Yes 0 No

Answer / chandu

2 stroke has higher efficiency because it has lesser number of moving parts .

Is This Answer Correct ?    0 Yes 0 No

Answer / charles

2 strike is more efficiency than 4 stroke..bcoz 2 stroke is one revolution to produce power and it fires 2 times in the time that 4 stroke ...

Is This Answer Correct ?    0 Yes 0 No

Answer / deepak k singh

4 STROKE

Is This Answer Correct ?    5 Yes 7 No

Answer / mohit gupta

In 4-stroke Engine.

Is This Answer Correct ?    2 Yes 4 No

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1) A mechanism which enables the rotary motion of one shaft to another shaft at the same axis is called a) Gear box b) Differential c) Clutch d) Flywheel 2) The main advantage of a good clutch is a) Good torque transmission b) Rapid engagement c) Large size d) High inertia 3) Hard shifting of gears would result when a) There is rapid engagement of gears b) There is less heat dissipation c) The clutch inertia is very high d) There is no clutch free pedal play 4) The torque transmitted by a clutch is given by a) T = μWR b) T = μ/WR c) T = μW/R d) T = 1/μWR 5) The coefficient of friction for the Asbestos-based materials used for clutch facing is a) 0.07 b) 0.17 c) 0.27 d) 0.37 6) The maximum amount of axial load to be applied on a clutch plate is a) 100 KN b) 200 KN c) 300 KN d) 400 KN 7) Mean effective radius of contact surfaces of a clutch plate is decided by a) Coefficient of friction b) Axial pressure c) Space available in the vehicle d) Amount of torque to be transmitted 8) Axial force to keep the clutch in engaged position is provided by a) Springs arranged circumferentially b) Pressure plate c) Flywheel d) Clutch pedal 9) The friction plate is always mounted on a) flywheel b) Pressure plate c) Internally splined hub d) Clutch spring 10) The main advantage of single plate clutch over cone clutch is a) Easier gear changing b) Less binding of contact surfaces c) Less pedal movement d) all of the above 11) The main function of transmission is a) To provide means to vary the torque ratio between the engine and the road wheels b) To provide neutral position c) To provide means to back the car d) all of the above 12) The resistance to the vehicle motion whose magnitude remain constant with respect to the vehicle speed is a) Resistance due to gradient b) Resistance due to the road c) Resistance due to the tyre friction d) all of the above 13) The resistance to the vehicle motion whose magnitude various with the square of the vehicle speed is a) Resistance due to gradient b) Resistance due to road c) Resistance due to the tyre friction d) Resistance due to wind 14) If the tractive effort is the highest for a given velocity, then the vehicle must be in a) Top gear b) Third gear c) Second gear d) First gear 15) The point of interaction of the tractive effort curve and the total resistance curve is called a) Stabilizing speed point b) Low speed point c) High speed point d) Normal speed point 16) If the given tractive effort curve and the total resistance curve does not intersect, then a) The vehicle will accelerate b) The vehicle will decelerate c) The vehicle will not be able to go at this gradient for the given gear d) None of the above 17) The main disadvantage of sliding mesh type of gear box is a) High noise level b) Low mechanical efficiency c) High skill required by the driver d) all of the above 18) Double declutching is used for the engagement of gears in a) Sliding mesh type of gear box b) Constant mesh type of gear box c) Synchromesh type of gear box d) None of the above 19) High speed gear is obtained in the case of sliding mesh gear box when a) Motion is transferred through the clutch gear to lay shaft gear b) Main shaft is coupled to the clutch shaft c) Smallest gear on the lay shaft is engaged d) Largest gear on the lay shaft is engaged 20) The Figure 1 depicts a) Top gear b) Second gear c) First gear d) Reverse gear 21) In case of a constant mesh gear box, when the left dog clutch is slid to the left by means of the selector mechanism, a) Direct gear is obtained b) First gear is obtained c) Second gear is obtained d) Reverse gear is obtained 22) In a constant mesh gear box, when the right dog clutch is engaged with the gear on the right side of the main shaft, a) Direct gear is obtained b) First gear is obtained c) Second gear is obtained d) Reverse gear is obtained 23) Double declutching is required in constant mesh gear box a) To equalize the speed of main shaft gear and the sliding dog b) To provide direct gear c) To equalize the speed of countershaft gear and the sliding dog d) None of the above 24) The number of spring loaded balls provided circumferentially in a synchromesh gear box is a) 3 b) 4 c) 5 d) 6 25) In a synchromesh device, when members G1 and F1 are slid to left and cones M1 and M2 are in contact, a) Direct gear is obtained b) Second gear is obtained c) Third gear is obtained d) Reverse gear is obtained 26) For the second gear in a synchromesh system, the drive transfer will be through a) U1, U2, C, F2, and splines b) U1, U2, C, F1, and splines c) U1, U3, D, F3, and splines d) U1, U4, U5, E, F2, and splines 27) Interlocking mechanism is provided in the gear box cover a) To prevent engagement of two gears simultaneously b) To prevent engagement of reverse gear c) To facilitate the gear selection d) To avoid the necessity of having neutral gear 28) Stiff spring is used in the selector mechanism a) To prevent engagement of two gears simultaneously b) To prevent engagement of reverse gear c) To facilitate the gear selection d) To avoid the necessity of having neutral gear 29) Propeller shaft is used for the purpose of a) Transmitting the drive from the transmission to the bevel pinion of the final drive b) Transmitting the drive from the crankshaft to the road wheels c) Transmitting the drive from the transmission to the road wheels d) Transmitting the drive from the crankshaft to the bevel pinion of the final drive 30) Slip joints are provided in the propeller shaft a) To adjust the inclination of the propeller shaft b) To adjust the length of the propeller shaft c) To prevent the whirling of the propeller shaft d) To adjust the up and down movement of the rear axle 31) If two shafts used for transfer of drive are inclined to each other, then a) Slip joint is used b) Flange coupling is used c) Universal joint is used d) None of the above 32) The Hook’s joint works efficiently when the propeller shaft inclination is a) 18o b) 28o c) 38o d) 48o 33) The number of arms provided to the Cross of the Hook’s joint is a) 1 b) 2 c) 3 d) 4 34) The function of the final drive is to a) Provide a permanent speed reduction b) To turn the drive round through 90o c) To provide drive to the rear wheels d) all of the above 35) The permanent reduction provided by the final drive in car is a) 4:1 b) 6:1 c) 8:1 d) 10:1 36) The permanent reduction provided by the final drive in heavy vehicle is a) 4:1 b) 6:1 c) 8:1 d) 10:1 37) Single reduction is used in final drive when it is about a) 6:1 b) 8:1 c) 10:1 d) 12:1 38) The function of Differential is a) To prevent wheel skidding b) To reduce the speed of the inner wheels during turning c) To keep the speed of all the wheels same when going straight ahead d) all of the above 39) The crown wheel of the final drive is connected to a) Cage b) Spider c) Cross pin d) Axle half shaft 40) In a vehicle, which is going straight ahead at N rpm, if the left wheel rotates forward at n rpm, then the resultant speed of 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