Schindler Lift Technician Interview Questions and Answers

The interview questions cover motor starters, layout, power factor, troubleshooting with megger, and fault finding.

• Motor starters are used to control the starting and stopping of motors.

• There are different types of motor starters such as direct-on-line, star-delta, and soft starters.

• The power layout of starters includes power supply, motor, and control circuit.

• The control layout of starters includes start, stop, and ov...read more

CNC stands for Computer Numerical Control and is used for automated machining processes, while SPM stands for Special Purpose Machine and is designed for specific tasks.

• CNC machines are versatile and can be programmed to perform a variety of tasks, while SPM machines are designed for a specific task or operation.

• CNC machines are commonly used in industries like automotive, aerospace, and manufacturing, while SPM machin...read more

Hydraulics is a branch of science and engineering that deals with the mechanical properties of liquids, particularly water and oil, and their applications in various systems.

• Hydraulics involves the study of fluid mechanics, fluid properties, and the behavior of liquids under pressure.

• It is commonly used in hydraulic systems such as hydraulic brakes in vehicles, hydraulic lifts, and hydraulic cranes.

• Hydraulic systems wo...read more

A simple diagram showing the flow of electricity through a relay

• Relay is an electrical switch that opens or closes circuits electronically

• Diagram should show input power source, relay coil, relay contacts, and output device

• Use symbols like a coil for the relay, lines for wires, and switches for contacts

TIG welding uses a tungsten electrode to create a weld. The current used depends on the material being welded.

• TIG stands for Tungsten Inert Gas welding

• The current used in TIG welding can vary depending on the material thickness and type

• For thin materials, lower currents are typically used, while thicker materials require higher currents

• The current can range from 5 to 400 amps in TIG welding

There are two types of current: direct current (DC) and alternating current (AC).

• Direct current (DC) flows in one direction only, typically produced by batteries or power supplies.

• Alternating current (AC) periodically changes direction, commonly used in household electrical systems.

• DC is used in electronic devices like computers and cell phones, while AC powers appliances and lighting.

• Examples of DC include car batteri...read more

Voltage value L-L is the voltage between two phases, while L-N is the voltage between a phase and neutral.

• Voltage value L-L is also known as line-to-line voltage.

• Voltage value L-N is also known as line-to-neutral voltage.

• L-L voltage is typically higher than L-N voltage in a three-phase system.

• For example, in a 120/208V three-phase system, the L-L voltage is 208V, while the L-N voltage is 120V.

A step-up transformer increases voltage while a step-down transformer decreases voltage.

• Step-up transformer increases voltage from primary to secondary winding

• Step-down transformer decreases voltage from primary to secondary winding

• Step-up transformers are used in power transmission to increase voltage for long-distance transmission

• Step-down transformers are used in power distribution to decrease voltage for consumer u...read more