Following components is not part of Spark Ignition (SI) engine:

This question was previously asked in
RRB ALP Mechanic Diesel 21 Jan 2019 Official Paper (Shift 1)
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  1. Glow plug
  2. Inlet and exhaust valve
  3. Intake manifold
  4. Gudgeon pin

Answer (Detailed Solution Below)

Option 1 : Glow plug
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Explanation:
Glow plug:
  • A heater plug or glow plug is used in a diesel engine having a pre-combustion chamber for igniting the diesel fuel spray.
  • This arrangement makes for an easy starting of a diesel engine in cold weather.
  • Most diesel engines use heater plugs.
  • The glow plug consists of a heating element (glowing coil) and is provided with an insulator shell and other parts.
  • In a multi-cylinder engine the number of glow plugs depends on the number of cylinders.
  • They are connected in series, parallel with the battery, through a glow plug switch, (control switch) a resistor, and a red indicator light, and they are provided on the dashboard (panel) of the vehicle.
  • The glow control switch is a three-way one, connecting to the starter also for starting purposes.
  • The glow control switch serves to connect and disconnect the battery with the glow plug as and when required.
  • The red indicator light indicates to the driver, the working of the glow plug or its failure.
F2 Vilas Engineering 9.1.2023 D12
The following are the main parts of the Spark Ignition Engine
  • Cylinder
  • Piston
  • Piston Rod
  • Connecting Rod
  • Spark Plug
  • Valves
  • crankshaft
  • Intake manifold
  • Exhaust manifold
  • Gudgeon pin
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