10+ R Kumar Opticians Interview Questions and Answers

Cylinder gasket heads are typically made of materials like graphite, asbestos, or metal.

• Graphite is a common material used in cylinder gasket heads due to its excellent sealing properties.

• Asbestos was previously used in gaskets but has been phased out due to health concerns.

• Metal gaskets, such as those made of steel or aluminum, are also used in certain applications.

• Other materials like rubber or composite materials may be used depending on the specific requirements of the en...read more

Oil pan gaskets are typically made from materials such as rubber, cork, silicone, or a combination of these.

• Rubber is a common material used in oil pan gaskets due to its flexibility and resistance to oil and heat.

• Cork is another material used in gaskets as it provides a good seal and is resistant to oil and chemicals.

• Silicone gaskets are known for their durability and ability to withstand high temperatures.

• Some gaskets may be made from a combination of these materials to pro...read more

There are several types of gaskets used in automobiles for various purposes.

• Cylinder head gasket

• Exhaust manifold gasket

• Intake manifold gasket

• Valve cover gasket

• Oil pan gasket

• Water pump gasket

• Transmission gasket

• Differential gasket

• Timing cover gasket

• Turbocharger gasket

There are various types of engines based on the number of cylinders.

• Engines can have 1, 2, 3, 4, 5, 6, 8, 10, 12, or even more cylinders.

• The number of cylinders affects the engine's performance, power, and fuel efficiency.

• Examples include inline engines (4-cylinder), V engines (6-cylinder), and W engines (12-cylinder).

There are two types of manifolds: intake manifold and exhaust manifold.

• Intake manifold: It supplies the air-fuel mixture to the cylinders.

• Exhaust manifold: It collects and expels the exhaust gases from the cylinders.

• Examples: Cast iron and stainless steel manifolds.

Yes, the flywheel is used as a part of a mechanism.

• The flywheel is a mechanical device used to store rotational energy.

• It is typically used in engines to maintain a steady rotational speed and provide smooth power delivery.

• In automobiles, the flywheel is connected to the crankshaft and helps in starting the engine, storing energy during deceleration, and providing rotational inertia.

• It also helps in reducing engine vibrations and maintaining a consistent speed during gear cha...read more

There are two kinds of two-stroke engines: spark ignition and compression ignition.

• Spark ignition two-stroke engines: These engines use a spark plug to ignite the fuel-air mixture, commonly found in motorcycles, chainsaws, and outboard motors.

• Compression ignition two-stroke engines: These engines rely on the heat generated by compression to ignite the fuel-air mixture, commonly found in large marine engines and some industrial applications.

There are several types of manifold gaskets used in automobile engines.

• Exhaust manifold gaskets

• Intake manifold gaskets

• Throttle body gaskets

• EGR (Exhaust Gas Recirculation) gaskets

• Turbocharger gaskets

• Supercharger gaskets

Pump gaskets are made of various materials.

• Pump gaskets can be made of rubber, cork, paper, or metal.

• Rubber gaskets are commonly used due to their flexibility and resistance to fluids.

• Cork gaskets are known for their compressibility and ability to seal irregular surfaces.

• Paper gaskets are used in low-pressure applications.

• Metal gaskets, such as those made of steel or copper, are used in high-temperature and high-pressure environments.

There are two types of air cleaners: mechanical air cleaners and electronic air cleaners.

• Mechanical air cleaners use filters to trap dust and other particles from the air.

• Electronic air cleaners use an electric charge to attract and trap particles.

• Examples of mechanical air cleaners include panel filters, pleated filters, and HEPA filters.

• Examples of electronic air cleaners include electrostatic precipitators and ionizers.

Felix Wankel, a German engineer, originated the Wankel engine.

• The Wankel engine was invented by Felix Wankel in the 1950s.

• Felix Wankel was a German mechanical engineer.

• The Wankel engine is a type of internal combustion engine that uses a rotary design.

• It is known for its compact size, high power-to-weight ratio, and smooth operation.

• Mazda is one of the most well-known manufacturers to have used the Wankel engine in their vehicles.

The Wankel engine was originated in Germany.

• The Wankel engine was invented by Felix Wankel in the 1950s.

• It was first developed and produced by the German company NSU Motorenwerke AG.

• The engine design features a rotary combustion chamber instead of the traditional reciprocating pistons.

• It offers advantages such as compact size, high power-to-weight ratio, and smooth operation.

• Mazda is one of the most well-known manufacturers to adopt and refine the Wankel engine technology.