d) Preventing deterioration of the wires. 326- The purpose of an impulse coupling is to : # 327- Impulse coupling is usually used on : # 328- If an impulse coupling spring breaks, the magneto will: # 329- The purpose of the starting vibrator is to : a) Start the engine. # b) To supply interrupted DC voltage to the magneto primary. c) Supply HT to the spark plugs directly. d) All the answers together are correct. 330- What is the purpose of the retard breaker? a) To assist in starting the engine. b) To supply a retarded spark. c) To deliver the spark nearer TDC. # d) All the answers are correct. 331- The relay coil in a starting vibrator is actuated: a) When the ignition switch is turned on. # b) When the ignition switch is on and starter switch is closed. c) When the battery switch is on. b) When the master switch is trued on.
332- An engine runs ok at low speeds but misses at high speeds the probable trouble is : # 333- What is magneto drop ? # a) Shorting the magneto. b) Damage to primary circuit. # c) Engine to overheat. d) Fouled spark plugs . 335- A low – tension ignition system: # a) For low altitude operation. b) To produce LT at the spark plug. # c) To overcome the problems of the HR system . d) All the answers are correct 337- What are the main sources of trouble in the HT IGN. System ? a) Flash – over b) Capacitance. c) Moisture and high voltage corona. # d) All the answers are correct. 338- What effect has moisture on the HT system ? a) It acts as a good insulator. b) It helps the distributor to conduct the supply to the terminals. # c) It may cause the HT to are to ground. d) Moisture only affects the LT ignition system .
339- In order to advance the ignition timing on a magneto , the mechanic must : # 340- After timing a magneto, if you increase the gap. The result would be: # 341- Which statement is true ?
- Summer '17
- sajad heidari
- Internal combustion engine, pistons, Connecting rod, Engine technology