Chapter 6 AUTOMOTIVE DIAGNOSTICTESTING MCQs 10 min Score: 0 Attempted: 0/10 Subscribe 1. Diagnostic means: (A) Tune up (B) To find cause of a problem (C) Engine service (D) Wire up an electrical circuitShow All Answers 2. Diagnostic is: (A) Hit and trial method (B) By chance (C) A systematic approach (D) All are diagnosingShow All Answers 3. Following is a step of diagnosing: (A) Communication with customer (B) All are correct (C) Checking components one by one (D) Inspection and verifyShow All Answers 4. Technician hears double metallic click. Possible cause may be: (A) Piston pin worn (B) Loose tappet (C) Piston slap (D) DetonationShow All Answers 5. A technician inserts feeler gauge between valve stem and rocker arm. If noise decreases, it shows: (A) Excessive valve clearance (B) Insufficient valve clearance (C) Correct clearance (D) All are incorrectShow All Answers 6. Engine cranks normally but does not start, following is not possible reason: (A) Incorrect ignition timing (B) Thermostat stuck closed (C) Air leakage through intake manifold (D) Carburetor overfuellingShow All Answers 7. Different cylinder misses. Following is not a reason: (A) Weak battery (B) Weak compression (C) Engine is overheated (D) Carbon in headShow All Answers 8. Engine runs on after switching off. Following statement is correct: (A) All are correct (B) Carbon deposits in cylinder head (C) Advance ignition timing (D) No current at idle solenoidShow All Answers 9. Low engine oil pressure is not caused by: (A) Tight pressure relief valve spring (B) Worn engine bearings (C) Thin oil (D) Choked oil lineShow All Answers 10. Engine backfires. Following possible reason is correct: (A) All are correct (B) Wrong heat range of spark plugs (C) Plug wires not sorted properly (D) Incorrect ignition timingShow All Answers
