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IC Engine Practice Test: Carburetion
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Avg score: 89% Most missed: “The ___________ engines can work on very lean mixture of fuel.”
Carburetion topics include: Carburetion, air fuel mixtures, automotive engines, carburetor parts and its types, altitude compensation and modern carburetors. Carburetion is the process of mixing fuel and air to create an explosive mixture. It's typically used in internal-combustion engines.  The carburettor atomizes the fuel and entrain it into the air as it is drawn into cylinders of an Otto Cycle Engine.  Factors that influence carburetion include: Time available for the mixture preparation Temperature of the incoming air Quality of the fuel supply  Some disadvantages of carburetors... Show more
IC Engine Practice Test: Carburetion
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25 Questions

1. On city roads one may be able to operate the vehicle between ________________ of the throttle only.
2. In carburetors, the top of the fuel jet with reference to the level in the float chamber is kept at ____________
3. Dieseling may take place due to ___________
4. The metering rod used in an economizer ___________
5. Venturi tube is also known as ___________
6. The choke in an automobile meant is for supplying ___________
7. If the vehicle is operated at an altitude higher than calibration altitude ____________ mixture is obtained.
8. When the throttle is suddenly opened, the mixture from the simple carburetor tends to become ___________
9. In multiple venturi system, the condensation of fuel is ___________
10. What are the important requirements of automobile carburetors?
11. The throttle regulates the output of the engine by ________________ the quantity of charge going into the cylinder.
12. At higher altitude, the mixture strength delivered by the carburetor becomes richer at a rate ___________ proportional to the square root of the density ratio.
13. The main metering system of the carburetor consists of ___________
14. Which of the following does not relate to spark ignition engine?
15. What is the part load efficiency of a carburetor?
16. At higher altitude, power is _____________
17. In the constant choke carburetor, the air and fuel flow areas are always maintained to be ___________
18. Air injected in IC engines refers to injection of ____________
19. A high flame speed is obtained in diesel engine when air fuel ratio is ____________
20. The pressure difference between the float chamber and the throat of the venturi is known as ___________
21. Carburetors with two outlets connected to two intake manifolds are known as ___________
22. An economizer valve opens at ______________ throttle operation.
23. Power impulses from IC engine are smoothed out by ____________
24. For idling condition in automotive engines, the air-fuel mixture must be ______________
25. The size of a carburetor is generally given in terms of the diameter of the ______________ in mm.