Ignition System MCQ

Test your knowledge with important Ignition System MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Ignition System MCQs at Bissoy

• The spark occurs when the:
  ক

  Contact breaker points close

  খ

  Contact breaker points open

  গ

  Ignition switch is on

  ঘ

  None of the above
• Which device is used to generate an electric current for producing spark in I. C. engine?
  ক

  Magneto

  খ

  Dynamo

  গ

  Condenser

  ঘ

  Plates
• An eight cylinder engine running at 3000 rpm requires . . . . . . . . spark per minute.
  ক

  1000

  খ

  3000

  গ

  12000

  ঘ

  None of the mentioned
• Insulating material generally used in spark plug is
  ক

  Wood

  খ

  Bakelite

  গ

  Polymer

  ঘ

  Porcelain
• The battery is charged by a . . . . . . . . driven by the engine.
  ক

  Shaft

  খ

  Axle

  গ

  Dynamo

  ঘ

  None of the mentioned
• An ignition system should provide a good spark between the . . . . . . . . of the plugs at the correct timing.
  ক

  Cathodes

  খ

  Anodes

  গ

  Electrodes

  ঘ

  None of the mentioned
• To develop high voltage for spark plug of petrol engine.
  ক

  Distributor is installed

  খ

  Carburettor is installed

  গ

  Battery is installed

  ঘ

  Ignition coil is installed
• In SI engines, to obtain required firing order<br>1. Battery is installed<br>2. Distributer is installed<br>3. Carburettor is installed<br>4. Ignition coil is installed<br>Which of the above statements is/are correct?
  ক

  1 only

  খ

  2 only

  গ

  1 and 3 only

  ঘ

  1, 3 and 4 only
• The primary winding of ignition coil is made of . . . . . . . .
  ক

  1 mm diameter copper wire

  খ

  0.8 mm diameter copper wire

  গ

  0.6 mm diameter copper wire

  ঘ

  1.2 mm diameter copper wire
• When the temperature of the center electrode exceeds a certain temperature, any carbon that has adhered will be burnt off, and the temperature at which this burning off of carbon commences is referred to as self cleaning temperature.
  ক

  True

  খ

  False
• An ignition process obeys the law of . . . . . . . .
  ক

  Conservation of mass

  খ

  Conservation of energy

  গ

  Conservation of momentum

  ঘ

  None of the mentioned
• The following is (are) the advantage(s) of Electronic Ignition system
  ক

  Produces maximum output voltage

  খ

  Better starting with cold engine

  গ

  Less possibility of arcing at spark plug

  ঘ

  All of the above
• The most accurate way of setting the contact breaker gap is by means of
  ক

  Feeler gauge

  খ

  Steel rule

  গ

  Dial gauge

  ঘ

  Dwell meter
• The main requirement of an ignition system is that the
  ক

  Spark at the plug electrode must be regular and timed with respect to the cylinder piston position

  খ

  Spark should be sufficiently strong so as to start ignition of the charge

  গ

  System should function efficiently at the maximum and minimum speeds of the engine

  ঘ

  All of the above
• The lowest speed of engine at which the engine runs smoothly is called . . . . . . . .
  ক

  At least speed

  খ

  Threshold speed

  গ

  Minimum speed

  ঘ

  Idling speed
• Horse power of engines varies with . . . . . . . .
  ক

  Air fuel ratio

  খ

  Amount of fuel in air fuel mixture

  গ

  Amount of air in air fuel mixture

  ঘ

  Engine speed
• The dwell angle on a six cylinder engine compared to a four cylinder engine is
  ক

  More

  খ

  Less

  গ

  Equal

  ঘ

  Sometimes less and sometimes more
• In magnetic ignition system, the primary current is produced by . . . . . . . .
  ক

  Battery

  খ

  Magnet

  গ

  Electrical current

  ঘ

  Ice
• The function of the ignition system is to . . . . . . . . the flame propagation process.
  ক

  Stop

  খ

  Initiate

  গ

  Balance

  ঘ

  None of the mentioned
• The duration of the ignition lag in an engine depends on the factors like
  ক

  Chemical nature of fuel

  খ

  Mixture ratio

  গ

  Electrode gap

  ঘ

  All the above
• The period when the energy grows exponentially in the primary circuit is called
  ক

  Make period

  খ

  Break period

  গ

  Storage period

  ঘ

  Discharge period
• The capacity of an automotive engine condenser is approximately
  ক

  0.2 microfarads

  খ

  2 microfarads

  গ

  20 microfarads

  ঘ

  2 millifarads
• In ignition coil, the ratio between the number of turns of primary and secondary windings is about
  ক

  1 to 50

  খ

  1 to 100

  গ

  1 to 200

  ঘ

  1 to 400
• The insulator of a spark plug is generally made up of
  ক

  Bakelite

  খ

  Asbestos

  গ

  Aluminuim alloy

  ঘ

  Copper
• The pressure, temperature and density of the mixture between the spark plug electrodes have a considerable influence on the . . . . . . . . required to produce a spark.
  ক

  Voltage

  খ

  Current

  গ

  Mass

  ঘ

  None of the mentioned
• Electrolyte used in storage battery consists of . . . . . . . .
  ক

  25% H₂SO₄ and 75% distilled water

  খ

  5% H₂SO₄ and 95% distilled water

  গ

  35% H₂SO₄ and 65% distilled water

  ঘ

  45% H₂SO₄ and 55% distilled water
• The ignition timing is affected by . . . . . . . .
  ক

  Compression ratio

  খ

  Engine speed

  গ

  Mixture strength

  ঘ

  All of the mentioned
• In Battery coil ignition system, the correct sequence of flow of current is
  ক

  Battery - Ammeter - Ignition coil - Distributor - Spark plug

  খ

  Battery - Ignition coil - Ammeter - Distributor - Spark plug

  গ

  Battery - Ammeter - Distributor - Ignition coil - Spark plug

  ঘ

  Battery - Distributor - Ammeter - Ignition coil - Spark plug
• The following is known as 'Breakerless Ignition system'
  ক

  Battery coil ignition system

  খ

  Magneto Ignition system

  গ

  Electronic Ignition system

  ঘ

  Capacitive discharge Ignition system
• The primary winding of the ignition coil consists of
  ক

  A few turns of thin wire

  খ

  Many turns of thin wire

  গ

  A few turns of thick wire

  ঘ

  Many turns of thick wire