Interview Questions and Answers

Reduce risk of global warming from R12 in air-conditioners

• Use alternative refrigerants like R134a or R290

• Ensure proper disposal of old refrigerants

• Regular maintenance and leak detection to prevent emissions

• Encourage energy-efficient ACs to reduce overall emissions

• Promote use of natural refrigerants like CO2 or ammonia

• Implement regulations and policies to phase out harmful refrigerants

• Invest in research and development of new, sustainable refrigerants

Air-conditioning parts of a car and their working condition.

• The compressor compresses the refrigerant gas.

• The condenser cools the refrigerant gas into a liquid.

• The evaporator absorbs heat from the car's interior.

• The expansion valve regulates the flow of refrigerant.

• The receiver-drier removes moisture from the refrigerant.

• All parts must be in good working condition for optimal cooling.

• Leaks in the system can cause poor performance or failure.

The Simplex method is used to solve linear programming problems with multiple variables and constraints.

• Used in optimization problems

• Used to find the optimal solution

• Used when there are multiple variables and constraints

• Examples include production planning and resource allocation

Petrol engines use spark ignition while diesel engines use compression ignition.

• Petrol engines have a higher power output but lower fuel efficiency compared to diesel engines.

• Diesel engines have a longer lifespan and are more durable than petrol engines.

• Petrol engines are lighter and more compact than diesel engines.

• Examples of petrol engines include those found in cars and motorcycles while diesel engines are commonly used in trucks and buses.

To check a vehicle starting problem, follow these steps.

• Check the battery for charge and corrosion

• Inspect the starter motor and solenoid

• Examine the ignition switch and wiring

• Test the fuel pump and filter

• Check for any error codes using a diagnostic tool