Vishnu Solutions Interview Questions and Answers

An after treatment system is a system used to reduce emissions from exhaust gases.

• After treatment systems are commonly used in vehicles to reduce harmful pollutants in exhaust gases.

• These systems typically include components such as catalytic converters, diesel particulate filters, and selective catalytic reduction systems.

• The purpose of an after treatment system is to treat the exhaust gases after they leave the engin...read more

The starting circuit is responsible for initiating the engine's ignition process.

• The starting circuit consists of components such as the battery, starter motor, ignition switch, and solenoid.

• When the ignition switch is turned on, it sends a signal to the solenoid, which then engages the starter motor.

• The starter motor uses electrical energy from the battery to turn the engine's crankshaft, starting the combustion proce...read more

CLFC Technology is a data compression algorithm used to reduce the size of files and improve storage efficiency.

• CLFC stands for Context List Frequency Counting.

• It is commonly used in file compression software like WinZip and 7-Zip.

• CLFC technology analyzes the frequency of data patterns and replaces them with shorter codes.

• This compression technique helps in reducing file sizes and optimizing storage space.

• It is based o...read more

A sensor is a device that detects and measures physical or chemical properties, while an actuator is a device that produces a physical action or response based on input.

• Sensors convert physical or chemical properties into electrical signals.

• Actuators convert electrical signals into physical actions or responses.

• Examples of sensors include temperature sensors, pressure sensors, and motion sensors.

• Examples of actuators i

DPF Regeneration Process is a method used to clean the diesel particulate filter (DPF) in a vehicle's exhaust system.

• DPF Regeneration Process is necessary to prevent the DPF from becoming clogged with soot and other particles.

• During the regeneration process, the engine's control unit increases the exhaust temperature to burn off the accumulated soot.

• There are two types of DPF regeneration: passive regeneration and acti...read more

Thermal management refers to the process of controlling and maintaining the temperature of electronic devices or systems.

• Thermal management involves techniques to dissipate heat generated by electronic components.

• It ensures that the temperature of electronic devices remains within safe operating limits.

• Techniques used in thermal management include heat sinks, fans, thermal interface materials, and liquid cooling system...read more

After treatment system is a system used to reduce harmful emissions from exhaust gases.

• After treatment system is commonly used in automotive industry to reduce pollutants emitted by vehicles.

• It typically includes components such as catalytic converters, diesel particulate filters, and selective catalytic reduction systems.

• The system works by converting harmful gases and particles into less harmful substances before the...read more

The starting circuit is responsible for initiating the engine's combustion process.

• The starting circuit consists of components such as the battery, starter motor, ignition switch, and solenoid.

• When the ignition switch is turned to the start position, it sends a signal to the solenoid, which engages the starter motor.

• The starter motor then cranks the engine, causing the pistons to move and the combustion process to begi...read more

The CNG filling pressure refers to the pressure at which compressed natural gas is filled into a CNG vehicle's fuel tank.

• CNG filling pressure is typically measured in units of pressure, such as psi (pounds per square inch) or bar.

• The specific filling pressure may vary depending on the country, vehicle type, and CNG system.

• In some countries, the standard CNG filling pressure is around 200 bar (2900 psi).

• However, it is i...read more

The components of a CNG low pressure system include the CNG tank, pressure regulator, fuel lines, and pressure gauge.

• CNG tank: Stores the compressed natural gas.

• Pressure regulator: Controls the pressure of the gas before it enters the engine.

• Fuel lines: Transports the CNG from the tank to the engine.

• Pressure gauge: Measures the pressure of the gas in the system.

The HT coil, also known as the high-tension coil, is an essential component in the ignition system of an internal combustion engine.

• The HT coil is responsible for generating a high voltage current that is necessary to create a spark in the spark plugs.

• It is typically located near the distributor or ignition module in the engine compartment.

• The HT coil consists of a primary winding and a secondary winding, which are wra...read more

To test a spark plug, you can perform a visual inspection, check for spark, and measure resistance.

• Inspect the spark plug for any signs of damage or wear, such as cracks or excessive carbon buildup.

• Remove the spark plug and connect it to the spark plug wire. Ground the spark plug against the engine block and crank the engine to check for a spark.

• Use a multimeter to measure the resistance of the spark plug. Compare the

A bad spark plug can be identified by its physical appearance and signs of damage.

• Inspect the spark plug for signs of fouling, such as black soot or oil deposits.

• Look for physical damage, such as cracks or corrosion on the spark plug.

• Check the electrode for wear or erosion, which can indicate a bad spark plug.

• Compare the appearance of the spark plug to a reference chart or consult the manufacturer's specifications.

• Perf...read more

There are mainly three types of batteries used in automobiles: lead-acid batteries, lithium-ion batteries, and nickel-metal hydride batteries.

• Lead-acid batteries are the most common type of battery used in automobiles.

• Lithium-ion batteries are becoming increasingly popular due to their higher energy density and longer lifespan.

• Nickel-metal hydride batteries are also used in some hybrid vehicles.

• Other types of batteries...read more

EV battery is a rechargeable battery used to power electric vehicles.

• EV batteries store electrical energy to power electric vehicles.

• They are typically lithium-ion batteries.

• EV batteries have a higher energy density compared to traditional lead-acid batteries.

• They provide the necessary power for the electric motor to propel the vehicle.

• EV batteries can be charged through various methods such as plug-in charging station...read more

Regenerative braking system is a mechanism that converts the kinetic energy of a moving vehicle into electrical energy.

• It is commonly used in electric and hybrid vehicles.

• During braking, the system uses the electric motor to reverse its operation and act as a generator.

• The generated electrical energy is then stored in a battery or used to power other vehicle systems.

• This system helps in improving fuel efficiency and re...read more

SCR system with chemical reactions is used to reduce nitrogen oxide emissions from diesel engines.

• SCR stands for Selective Catalytic Reduction.

• It involves injecting a urea-based solution into the exhaust stream.

• The urea reacts with nitrogen oxides (NOx) in the presence of a catalyst, converting them into nitrogen and water.

• The catalyst used is usually made of materials like titanium dioxide or zeolite.

• SCR systems are c...read more