Chapter 15 PROBLEMS, THEIR CAUSES AND REMEDIES OF ENGINE FUEL SYSTEM MCQs 15 min Score: 0 Attempted: 0/15 Subscribe 1. . Which circuit maintains the level of fuel in carburetor: (A) Choke circuit (B) Float circuit (C) Acceleration pump circuit (D) None of theseShow All Answers 2. . Which part of carburetor helps the cold engine to start: (A) Float circuit (B) Choke circuit (C) Acceleration pump circuit (D) None of theseShow All Answers 3. . Which part of carburetor helps to increase air velocity in air horn: (A) Air horn (B) Barrel (C) Nozzle (D) VenturiShow All Answers 4. . Which part of carburetor controls the quantity of air fuel mixture entering the cylinder: (A) Choke valve (B) Throttle valve (C) Air valve (D) Needle valveShow All Answers 5. . If the quantity of air increases in air fuel mixture, this type is called: (A) Rich air fuel mixture (B) Lean air fuel mixture (C) Normal air fuel mixture (D) Stoichiometric ratioShow All Answers 6. . Float chamber will flood if: (A) Air cleaner is choked (B) Fuel filter is choked (C) Fuel line is bended (D) Needle valve is faultyShow All Answers 7. . Engine runs a few seconds after switch off, this fault is: (A) Dieseling (B) Engine flooding (C) Engine missing (D) HuntingShow All Answers 8. . Electric switch in idling circuit is called: (A) Choke valve (B) Idle speed solenoid (C) Idle speed control valve (D) Idle speed regulatorShow All Answers 9. . If air enters diesel fuel system, it may cause: (A) Better injection (B) Fuel blockage (C) Better atomization (D) Better distributionShow All Answers 10. . Removing air from fuel system is called: (A) Scavenging (B) Air bleeding (C) Air injection (D) Air inductionShow All Answers 11. . When air enters fuel system, problem is called: (A) Air injection (B) Air bleeding (C) Air lock (D) Hydro lockShow All Answers 12. . If 12:1 ratio is provided, mixture is: (A) Normal air fuel mixture (B) Rich air fuel mixture (C) Lean air fuel mixture (D) None of theseShow All Answers 13. . If 16:1 ratio is used, mixture is: (A) Normal air fuel mixture (B) None of these (C) Rich air fuel mixture (D) Lean air fuel mixtureShow All Answers 14. . Black smoke from engine means: (A) Broken piston ring (B) Choked air cleaner (C) Damaged oil seal (D) Faulty thermostatShow All Answers 15. . Float chamber will flood if: (A) Choke valve is closed (B) Throttle valve fully opened (C) Float bowl not vented (D) Float is leakedShow All Answers