1. Turbulence is a very rapid movement of gases:
(A) coolant
(B) oil
(C) gases
(D) None of these
2. The air and fuel mixture is squashed in the ______ area:
(A) thin
(B) combustion
(C) quench
(D) None of them
3. The hemispherical combustion chamber is also called:
(A) wedge chamber
(B) Precombustion chamber
(C) hemi-head
(D) None of these
4. The wedge combustion chamber restricts the flow of _______ to a certain extent:
(A) fuel
(B) air
(C) both a & b
(D) None of these
5. The open combustion chamber has the combustion chamber located directly inside the:
(A) cylinder
(B) cylinder head
(C) piston
(D) None of these
6. Shallow depth combustion chambers are mostly used in the ____ engines:
(A) heavy
(B) light
(C) both a & b
(D) None of these
7. The swirl can be produced by masking the valve for nearly _____ of the circumference:
(A) 90°
(B) 180°
(C) 360°
(D) None of these
8. Indirect chamber having part:
(A) one
(B) two
(C) three
(D) None of these
9. During the compression stroke, _____ of the air will be transferred to this swirl chamber:
(A) 40%
(B) 50%
(C) 60%
(D) None of these
10. The energy will be released in the main combustion chamber:
(A) 60%
(B) 70%
(C) 80%
(D) None of these
11. The second portion of air cell chamber is called:
(A) energy cell
(B) pre chamber
(C) wedge chamber
(D) None of these
12. Delay period is the time from ________ of injection to the attainment of chemical reaction conditions:
(A) ending
(B) beginning
(C) swirling
(D) None of these
13. Both temperature and pressure increase the rate of:
(A) power
(B) scuffing
(C) chemical action
(D) None of these
14. The period of rapid combustion is also called the:
(A) controlled combustion
(B) uncontrolled combustion
(C) abnormal combustion
(D) None of these
15. Chemical decarbonization involves running a chemical compound along with the fuel:
(A) fuel
(B) detergent
(C) water
(D) None of these
16. The motion of air in the combustion chamber is called:
(A) quench
(B) squish
(C) turbulence
(D) None of these
17. Turbulence accelerates __________ by intimate mixing of the fuel and oxygen in the combustion chamber:
(A) chemical reaction
(B) combustion process
(C) decarburize
(D) None of these
18. Squish is the clearance between the piston and the ______ inside the cylinder:
(A) combustion chamber
(B) cylinder head
(C) squish band
(D) None of these
19. Quenching is the mixing of gases by pressing them into a:
(A) thin area
(B) combustion chamber
(C) cylinder
(D) None of these
20. The mixture in the quench area is ______ out at high speed as the piston moves up:
(A) forced
(B) decrease
(C) squeezed
(D) None of them