Ola Electric Mobility Senior Engineer Interview Questions and Answers

Engine working refers to the process of converting fuel into mechanical energy to power a vehicle or machine.

• Fuel is ignited in the combustion chamber, creating high-pressure gases that push the pistons down.

• The pistons are connected to the crankshaft, which converts the up-and-down motion into rotational motion.

• The rotational motion is transferred to the transmission, which then powers the wheels or other machinery.

• Th...read more

A 4-stroke diesel engine works on the principle of internal combustion, where fuel is ignited by compressed air.

• Intake stroke: air is drawn into the cylinder

• Compression stroke: air is compressed, raising its temperature

• Power stroke: fuel is injected and ignited, causing a rapid expansion of gases and pushing the piston down

• Exhaust stroke: the piston pushes the exhaust gases out of the cylinder

• Diesel engines are more fu...read more

There are several types of engines, including internal combustion, electric, hybrid, and rotary engines.

• Internal combustion engines are the most common and include gasoline and diesel engines.

• Electric engines use electricity to power the vehicle and are becoming more popular.

• Hybrid engines combine both internal combustion and electric engines.

• Rotary engines are less common and use a unique design to generate power.

• Othe...read more

A value timing diagram is a graphical representation of the timing relationship between input and output signals.

• It shows the timing relationship between input and output signals

• It is used to analyze the behavior of digital circuits

• It helps in identifying timing violations and optimizing circuit performance

• It consists of a horizontal time axis and vertical voltage axis

• Examples include setup and hold time diagrams for f

The 3 main engine systems are fuel, ignition, and cooling.

• Fuel system: responsible for delivering fuel to the engine

• Ignition system: responsible for igniting the fuel-air mixture

• Cooling system: responsible for regulating the engine temperature

• Examples: gasoline engine, diesel engine, hybrid engine

My expected CTC is in line with industry standards for a Sr. Engineer role.

• Research industry standards for Sr. Engineer roles in the current market

• Consider my years of experience, skills, and qualifications when determining my expected CTC

• Be open to negotiation based on the overall compensation package offered

Star-Delta wiring diagram involves connecting a motor in two different configurations for starting and running.

• Star connection involves connecting all three terminals of the motor windings together to form a star shape.

• Delta connection involves connecting the terminals in a triangular shape.

• Switching between star and delta configurations is done using a special motor starter.

• Star-Delta wiring is commonly used for reduc...read more

Star-delta ladder logic is used to control the starting method of a three-phase induction motor.

• Use two sets of contactors to switch between star and delta connections.

• Implement a timer to delay the transition from star to delta.

• Include overload protection for the motor.

• Ensure proper interlocking to prevent simultaneous connection of star and delta.

• Test the ladder logic thoroughly before implementation.