600+ Automobile Engineering MCQ page-27

Question 261:- The ratio of the distributor shaft and the crankshaft speed is (a) one (b) one-half (c) one-fourth (d) two

Question 262:- The centrifugal advance machine provides ignition advance proportional to (a) engine load (b) engine speed (c) both a and b (d) none of the above

Question 263:- Vacuum advance mechanism operate at (a) light engine load (b) heavy engine load (c) high engine speed (d) any of the above

Question 264:- Ignition timing can be adjusted by a (a) accurate clock (b) stop watch (c) stroboscopic light (d) vacuum gauge

Question 265:- The commonly used material of insulator of spark plug is (a) bakelite (b) asbestos (c) alumina (d) copper

Question 266:- Compare to the life of a spark plug of two stroke engine, the spark plug life of a four-stroke engine is approximately (a) same (b) twice (c) one-half (d) none of the above

Question 267:- A spark may be fouled by (a) petrol (b) oil (c) lead (d) all of these

Question 268:- Spark plug having white insulator tip indicates (a) over advanced ignition (b) retarded ignition (c) leaded fuel (d) gas leak

Question 269:- A spark plug with a black centre insulator indicates (a) over advance ignition (b) retarded ignition (c) stuck-up choke valve in the carburretor (d) excessive dwell

Question 270:- A semi-conductor is a material with (a) more than four electrons in its outermost orbit (b) less than four electrons in its outermost orbit (c) exactly four electrons in its outermost orbit (d) none of the above