1. . Which circuit maintains the level of fuel in carburetor:
(A) Choke circuit
(B) Float circuit
(C) Acceleration pump circuit
(D) None of these
2. . Which part of carburetor helps the cold engine to start:
(A) Float circuit
(B) Choke circuit
(C) Acceleration pump circuit
(D) None of these
3. . Which part of carburetor helps to increase air velocity in air horn:
(A) Air horn
(B) Barrel
(C) Nozzle
(D) Venturi
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 valve
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 ratio
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 faulty
7. . Engine runs a few seconds after switch off, this fault is:
(A) Dieseling
(B) Engine flooding
(C) Engine missing
(D) Hunting
8. . Electric switch in idling circuit is called:
(A) Choke valve
(B) Idle speed solenoid
(C) Idle speed control valve
(D) Idle speed regulator
9. . If air enters diesel fuel system, it may cause:
(A) Better injection
(B) Fuel blockage
(C) Better atomization
(D) Better distribution
10. . Removing air from fuel system is called:
(A) Scavenging
(B) Air bleeding
(C) Air injection
(D) Air induction
11. . When air enters fuel system, problem is called:
(A) Air injection
(B) Air bleeding
(C) Air lock
(D) Hydro lock
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 these
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 mixture
14. . Black smoke from engine means:
(A) Broken piston ring
(B) Choked air cleaner
(C) Damaged oil seal
(D) Faulty thermostat
15. . Float chamber will flood if:
(A) Choke valve is closed
(B) Throttle valve fully opened
(C) Float bowl not vented
(D) Float is leaked