Putzmeister Concrete Machines Service Engineer Interview Questions and Answers

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 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

A hydraulic circuit is a system that uses pressurized fluid to transmit power.

• A hydraulic pump is used to create pressure in the fluid.

• Valves control the flow of fluid through the circuit.

• Actuators, such as cylinders or motors, convert the fluid pressure into mechanical force.

• A reservoir stores the fluid and a filter removes contaminants.

• Examples include excavators, cranes, and hydraulic presses.

Tappet setting is the process of adjusting the clearance between the tappet and the valve stem in an engine.

• Tappet setting ensures proper valve timing and prevents engine damage.

• It involves adjusting the clearance between the tappet and the valve stem using a feeler gauge.

• The correct tappet setting varies depending on the engine model and manufacturer.

• Incorrect tappet setting can cause engine noise, poor performance, a...read more

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