Farm Tractors and Power Units MCQs

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1. : The main function of a farm tractor is:
(A) Transport only
(B) Provide mechanical power for farm operations
(C) Harvest crops
(D) Store fuel for implements

2. : The average range of engine power in general-purpose tractors is:
(A) 5–10 HP
(B) 20–120 HP
(C) 200–400 HP
(D) More than 600 HP

3. : The power available at tractor wheels is called:
(A) Brake horsepower
(B) Drawbar horsepower
(C) PTO horsepower
(D) Indicated horsepower

4. : PTO in tractors is provided to:
(A) Reduce slip of wheels
(B) Supply rotary power to implements
(C) Increase drawbar pull
(D) Control steering

5. : Three-point linkage system in tractors is used for:
(A) Steering
(B) Power transmission
(C) Hitching and controlling mounted implements
(D) Fuel supply

6. : The power available at the crankshaft of a tractor engine is called:
(A) Drawbar power
(B) Brake horsepower (BHP)
(C) PTO power
(D) Indicated power

7. : The stability of a tractor on slopes is mainly affected by:
(A) Center of gravity and track width
(B) Wheel slip only
(C) Brake horsepower only
(D) PTO operation

8. : The rolling resistance of tractor tires on a firm soil surface is about:
(A) 1–3% of tractor weight
(B) 5–10% of tractor weight
(C) 15–20% of tractor weight
(D) More than 25% of tractor weight

9. : The turning efficiency of a tractor is generally:
(A) 40–50%
(B) 60–70%
(C) 70–80%
(D) 80–90%

10. : The type of tractor most suitable for wetland paddy fields is:
(A) Crawler tractor
(B) Four-wheel drive tractor
(C) Garden tractor
(D) Industrial tractor

11. : The slip of tractor wheels in cultivated fields should normally be:
(A) 1–3%
(B) 5–7%
(C) 10–20%
(D) 25–30%

12. : Specific fuel consumption of a diesel tractor engine is approximately:
(A) 100–150 g/kWh
(B) 200–250 g/kWh
(C) 400–500 g/kWh
(D) 600–800 g/kWh

13. : The steering system of a tractor is designed to:
(A) Reduce slip
(B) Provide directional control
(C) Transmit power
(D) Increase fuel efficiency

14. : The rated engine speed of most agricultural tractors lies in the range:
(A) 200–500 rpm
(B) 1000–1500 rpm
(C) 1500–2500 rpm
(D) Above 5000 rpm

15. : In tractors, differential lock is used to:
(A) Reduce fuel consumption
(B) Prevent wheel slip by locking both drive wheels
(C) Increase PTO speed
(D) Reduce drawbar load

16. : The gear box of a tractor provides:
(A) Different forward and reverse speeds
(B) Power amplification
(C) Stability
(D) Fuel storage

17. : The hydraulic system in tractors is primarily used for:
(A) Engine cooling
(B) Lubrication
(C) Lifting and controlling mounted implements
(D) Fuel injection

18. : The typical PTO speed in tractors is standardized at:
(A) 250 rpm
(B) 540 rpm
(C) 1000 rpm
(D) Both (B) and (C)

19. : The tractive efficiency of a tractor is the ratio of:
(A) Drawbar power to brake horsepower
(B) Brake horsepower to drawbar power
(C) Engine efficiency to fuel consumption
(D) Wheel slip to draft

20. : Wheel ballast is added to a tractor to:
(A) Reduce engine speed
(B) Increase traction and reduce wheel slip
(C) Increase PTO power
(D) Cool the engine

21. : The braking system in tractors is provided on:
(A) Rear wheels only
(B) Front wheels only
(C) Both front and rear wheels
(D) Engine shaft

22. : A crawler tractor uses:
(A) Pneumatic tires
(B) Tracks instead of wheels
(C) Only front-wheel drive
(D) Small turning radius

23. : The stability of tractors against side overturning increases with:
(A) Higher center of gravity
(B) Narrow track width
(C) Wider wheel base
(D) Reduced drawbar pull

24. : The flywheel of a tractor engine is used to:
(A) Reduce fuel consumption
(B) Maintain uniform speed by storing energy
(C) Increase wheel slip
(D) Supply PTO power

25. : The maximum drawbar horsepower of a tractor is obtained when:
(A) Slip is zero
(B) Slip is about 10–15%
(C) Slip is 30–40%
(D) Tractor is stationary