Chapter 5 AUTOMOTIVE ENGINE TESTING INSTRUMENTS MCQs 10 min Score: 0 Attempted: 0/10 Subscribe 1. Following statement is true about tachometer. (A) Shows engine rpm (B) Display car speed (C) Show CO contents (D) Shows compression pressureShow All Answers 2. Following instrument is useful in adjusting C-B points. (A) Tachometer (B) Dwell meter (C) Dynamo meter (D) Exhaust gas analyzerShow All Answers 3. Normally, compression pressure in a petrol engine (Kg/cm²) is: (A) 6 (B) 25 (C) 11 (D) 36Show All Answers 4. During compression test, technician does the following: (A) Disable ignition system (B) All are correct (C) Open the throttle valve with a wire (D) Disable electric fuel pumpShow All Answers 5. Compression reading between two adjacent cylinders is below normal. Possible reason is: (A) Valve sticking open (B) Carbon in combustion chamber (C) Ruptured head gasket (D) Worn piston ringsShow All Answers 6. Cylinder leakage test does not tell about: (A) Valve seat leakage (B) Worn piston rings (C) Worn engine bearings (D) Leaking head gasketShow All Answers 7. Normal vacuum gauge reading is (inch of Hg): (A) 37 to 42 (B) 27 to 32 (C) 17 to 22 (D) 47 to 52Show All Answers 8. Vacuum gauge shows too little reading. Possible reason may be: (A) Restricted exhaust (B) Broken valve spring (C) Cracked intake manifold (D) Rich mixtureShow All Answers 9. Following is important consideration while using ignition timing light: (A) Never connect leads in reverse (B) Avoid wires to be caught in fan (C) Identify timing marks (D) All are correctShow All Answers 10. During checking ignition timing, technician disconnects vacuum pipe from distributor. Following is true: (A) Timing will advance (B) Timing will retard (C) Timing will change rapidly (D) None of theseShow All Answers