Putzmeister Concrete Machines Manager Interview Questions and Answers

Implemented a new customer feedback system to improve service quality

• Introduced online feedback forms for customers to easily provide input

• Conducted regular surveys to gather feedback on specific aspects of service

• Analyzed feedback data to identify areas for improvement and implemented changes accordingly

The interview covered topics such as hydraulic principles, engine workings, proportional valves, valve blocks, types of hydraulic pumps, hydraulic and electrical circuits, working culture, customer handling, and field experience.

• Hydraulic principles involve the use of fluids to generate power and control movement.

• Engines work by converting fuel into energy, which is then used to power the vehicle or machine.

• Proportiona...read more

AC drives are used for controlling the speed of AC motors, while DC drives are used for controlling the speed of DC motors.

• AC drives are used for controlling the speed of AC motors by varying the frequency of the input power.

• DC drives are used for controlling the speed of DC motors by varying the voltage supplied to the motor.

• AC drives are more commonly used in industrial applications due to the prevalence of AC power ...read more

SI engines use spark plugs for ignition, while CI engines use compression for ignition.

• SI engines have spark plugs to ignite the air-fuel mixture, while CI engines rely on compression to ignite the fuel.

• SI engines are commonly used in gasoline vehicles, while CI engines are typically found in diesel vehicles.

• SI engines have a higher power output compared to CI engines.

• SI engines have a higher fuel efficiency compared t

Specific gravity of a battery is a measure of its electrolyte's density compared to water.

• Specific gravity is typically measured using a hydrometer.

• It indicates the state of charge of a lead-acid battery.

• A fully charged lead-acid battery will have a specific gravity of around 1.265.

• A discharged battery will have a lower specific gravity, around 1.150.

A hydraulic pump is a mechanical device that converts mechanical power into hydraulic energy by generating flow within a hydraulic system.

• Hydraulic pumps are used to generate flow to move fluids within a hydraulic system.

• They are commonly used in applications such as construction equipment, automotive systems, and industrial machinery.

• There are different types of hydraulic pumps, including gear pumps, vane pumps, and p...read more

Hydraulic systems use liquid to transmit power, while pneumatic systems use gas.

• Hydraulic systems use oil or water as the fluid medium, while pneumatic systems use air or other gases.

• Hydraulic systems are typically used in heavy-duty applications like construction equipment, while pneumatic systems are used in lighter applications like air brakes in vehicles.

• Hydraulic systems are generally more powerful and can handle ...read more

AC DC transformer motor automation is a process of controlling and regulating the operation of a motor using an AC DC transformer.

• AC DC transformer motor automation involves converting AC power to DC power using a transformer.

• The DC power is then used to control and regulate the operation of a motor.

• This automation process allows for efficient and precise control of motor speed, torque, and direction.

• Examples of AC DC ...read more

AC changes direction periodically while DC flows in one direction continuously.

• AC changes direction periodically, while DC flows in one direction continuously

• AC is commonly used in household appliances and power distribution systems

• DC is commonly used in batteries and electronic devices

• AC voltage can be easily converted using transformers, while DC voltage requires more complex conversion methods

Grounding is the process of connecting an electrical circuit or device to the earth or to a reference point that is at the same potential as the earth.

• Grounding helps to prevent electric shock and protect equipment from damage.

• It provides a path for excess electrical current to flow safely to the ground.

• Grounding also helps to reduce electromagnetic interference and improve the performance of electrical systems.

• Example...read more

Newton's 2nd law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

• F = ma (force equals mass times acceleration)

• Acceleration is in the same direction as the net force

• The greater the force applied to an object, the greater its acceleration

• The greater the mass of an object, the smaller its acceleration for a given force

Permanent location is required for work to ensure timely response to service calls and availability for on-site troubleshooting.

• Timely response to service calls

• Availability for on-site troubleshooting

• Efficient scheduling of work orders