Interview questions for KIA motors

1. At Kia Motors we put a lot of pride in our customer service. How do you go above and beyond for your clientele?

Assure the interviewer that you take customer service seriously. Use an example of a time when you have gone over and above the general expectations in order to make a customer happy. Be sure to acknowledge the customer service efforts that Kia Motors puts forward.

2. How can we motivate you on the job?

Every employer should know how each staff member is best motivated. Talk to the interviewer about the variety of ways in which you are best motivated on the job.

3. What is the difference between pre decrement operator and post decrement operator?

• Pre decrement operator is used to decrement variable value by 1 before assigning the value to the variable.
• Post decrement operator is used to decrement variable value by 1 after assigning the value to the variable.

4. What Is An Induction Motor?

An induction motor (IM) is a type of asynchronous AC motor where power is supplied to the rotating device by means of electromagnetic induction.

5. How An Induction Motor Is Started? Why The Starter Is Used?

When the motor is started, the slip is equal to 1 as the rotor speed is zero, so the induced emf in the rotor is large. As a result, a very high current flows through the rotor. This is similar to a transformer with the secondary coil short circuited, which causes the primary coil to draw a high current from the mains. Similarly, when an induction motor starts, a very high current is drawn by the stator, on the order of 5 to 9 times the full load current. This high current can damage the motor windings and because it causes heavy line voltage drop, other appliances connected to the same line may be affected by the voltage fluctuation. To avoid such effects, the starting current should be limited.

6. What Is An Electric Motor?

An Electric Motor converts electrical power to mechanical power in its rotor.

7. What is the assignment operator?

Divide AND assignment operator. It divides the left operand with the right operand and assigns the result to the left operand. Modulus AND assignment operator. It takes modulus using two operands and assigns the result to the left operand

8. What is the difference between Var and pre decrement?

Pre decrement operator (–var) first decrement the value of variable by oneand then it returns its value whereas post decrement operator (var–) first returns the value of variable then decrements its value by 1. Pre decrement operator first decrement the value of var by one and then returns its value. Above printf statement will print

9. What Is A Cogging Torque?

Cogging torque of electrical motors is the torque due to the interaction between the permanent magnets of the rotor and the stator slots of a Permanent Magnet (PM) machine. Also termed as detent or ‘no-current’ torque, it is an undesirable component for the operation of such a motor. It is especially prominent at lower speeds, with the symptom of jerkiness.

10. What Is Commutator?

A commutator is an electrical switch that periodically reverses the current direction in an electric motor or electrical generator. A commutator is a common feature of direct current rotating machines. By reversing the current direction in the moving coil of a motor’s armature, a steady rotating force (torque) is produced. Similarly, in a generator, reversing of the coil’s connection to the external circuit produces unidirectional current in the circuit.

11. What Is The Basic Difference Between Synchronous Motor And An Induction Motor?

The basic difference between an induction motor and a synchronous AC motor is that in the latter a current is supplied onto the rotor. This then creates a magnetic field which, through magnetic interaction, links to the rotating magnetic field in the stator which in turn causes the rotor to turn. It is called synchronous because at steady state the speed of the rotor is the same as the speed of the rotating magnetic field in the stator.

12. How An Induction Motor Is Started? Why The Starter Is Used?

When the motor is started, the slip is equal to 1 as the rotor speed is zero, so the induced emf in the rotor is large. As a result, a very high current flows through the rotor. This is similar to a transformer with the secondary coil short circuited, which causes the primary coil to draw a high current from the mains. Similarly, when an induction motor starts, a very high current is drawn by the stator, on the order of 5 to 9 times the full load current. This high current can damage the motor windings and because it causes heavy line voltage drop, other appliances connected to the same line may be affected by the voltage fluctuation. To avoid such effects, the starting current should be limited.

13. Why Stator Windings Are Arranged Around The Rotor?

The induction motor does not have any direct supply onto the rotor; instead, a secondary current is induced in the rotor. To achieve this, stator windings are arranged around the rotor so that when energised with a polyphase supply they create a rotating magnetic field pattern which sweeps past the rotor. This changing magnetic field pattern can induce currents in the rotor conductors. These currents interact with the rotating magnetic field created by the stator and the rotor will turn.

14. What Is A Stator?

The stator consists of wound ‘poles’ that carry the supply current that induces a magnetic field in the conductor. The number of ‘poles’ can vary between motor types but the poles are always in pairs (i.e. 2, 4, 6, etc.).

15. What Techniques Is Used To Produce A Desired Speed?

The most commonly used technique is Pulse Width Modulation in which a DC signal is switched on and off very rapidly, producing a sequence of electrical pulses to the inductor windings.

16. What Is The Difference Between Dc Motors And The Induction Motors?

The induction motor has no brushes and is easy to control, many older DC motors are being replaced with induction motors and accompanying inverters in industrial applications.