Hitachi Engineer Interview Questions and Answers

Consumption gap analysis involves identifying and understanding the difference between actual and desired levels of consumption.

• Identify the desired level of consumption

• Determine the actual level of consumption

• Calculate the gap by subtracting the actual level from the desired level

• Analyze the reasons for the consumption gap

• Identify potential solutions to bridge the gap

Inventory gaps in a system refer to discrepancies or shortages in the quantity or availability of items.

• Stockouts: When an item is out of stock and unavailable for purchase or use.

• Overstocking: When there is an excess of inventory beyond what is needed or can be sold.

• Obsolete inventory: Items that are no longer in demand or have become outdated.

• Shrinkage: Loss of inventory due to theft, damage, or other reasons.

• Lead ti...read more

The power plant process involves converting fuel into electricity through various stages.

• Fuel is burned to produce heat

• Heat is used to create steam

• Steam turns a turbine

• Turbine generates electricity

• Electricity is sent to the grid for distribution

Elevator breakdown refers to the malfunction or failure of an elevator system.

• Elevator breakdown can occur due to various reasons such as mechanical issues, power failure, or sensor malfunction.

• When an elevator breaks down, it may get stuck between floors, preventing people from using it.

• In such situations, technicians are called to diagnose and fix the problem to restore the elevator's functionality.

• Regular maintenanc...read more

There are several types of elevator controllers used in different elevator systems.

• Relay-based controllers: These controllers use relays to control the movement of the elevator car.

• Microprocessor-based controllers: These controllers use microprocessors to control the elevator's operation.

• Hydraulic controllers: These controllers are specifically designed for hydraulic elevator systems.

• Traction controllers: These control...read more

Elevator control system is responsible for managing the movement and operation of elevators.

• Elevator control system coordinates the movement of multiple elevators in a building.

• It ensures efficient and safe transportation of passengers or goods between different floors.

• The system includes components like buttons, sensors, motors, and a central control unit.

• It uses algorithms to optimize elevator routes and minimize wai...read more

The types of motors used for lift installation include AC motors, DC motors, and gearless motors.

• AC motors are commonly used in lifts due to their reliability and ability to handle heavy loads.

• DC motors are used in lifts that require precise control and smooth operation.

• Gearless motors are used in high-rise buildings as they provide high torque and require less maintenance.

• Examples of AC motor brands used in lifts incl...read more