Session 4: Tuning of Ignition System of an Engine
Unit 5: Regular Maintenance of an Engine
Textual Question-Answers
Check Your Progress
A. Fill in the blanks
1. The ignition system plays an important role in process of…………………. Ans: combustion
2. Ignition system is classified in two ways …………… circuit withLT leads and …………… circuit with HT leads.
Ans: low tension, high tension
B. Multiple choice questions
1. The ignition system converts current from…………….
(a) 12 volt to 20,000 volt
(b) 13 volt to 40,000 volt
(c) 14 volt to 30000 volt
(d) None of the above
Ans: (a) 12 volt to 20,000 volt
2. Thin wires and their connections supply current between 12 volts and are called…………..
(a) low tension leads
(b) high tension leads
(c) multi volts
(d) None of the above
Ans: (a) low tension leads
3. The thick wires supply current of 20–25,000 volts and arecalled…………..
(a) High Tension Leads
(b) Low Tension Leads
(c) 12volt to 20,000 volt
(d) All of the above
Ans: (a) High Tension Leads
C. Answer the following questions
1. Why is tuning of ignition system of engine necessary?
Ans: Tuning of the ignition system is necessary to ensure proper sparktiming, smooth engine operation, better fuel efficiency, easy starting, reducedfuel consumption, and to avoid engine misfiring and power loss.
2. What are the steps to be followed while tuning the ignition systemof an engine?
Ans: The steps include checking and cleaning spark plugs, adjusting sparkplug gap, inspecting and tightening low tension and high tension leads, checking ignition coil condition, setting correct ignition timing, and ensuringproper functioning of all ignition components.
