TCS Interview Questions and Answers

Single phase voltage of 220V is different from three phase voltage of 415V. Explain the cause.

• Single phase voltage has two conductors while three phase voltage has three conductors

• The voltage levels are different due to the number of conductors used

• Single phase voltage is commonly used in households while three phase voltage is used in industrial settings

• The power delivered by three phase voltage is more efficient than single phase voltage

Why-Why Analysis is a problem-solving technique used to identify the root cause of a problem by asking 'why' multiple times.

• Why-Why Analysis involves asking 'why' at least five times to identify the root cause of a problem.

• It helps to identify the underlying causes of a problem rather than just addressing the symptoms.

• For example, if a machine breaks down, asking 'why' could reveal that it was due to lack of maintenance or faulty parts.

• Why-Why Analysis can be used in conjunct...read more

PDCA is a continuous improvement model consisting of Plan, Do, Check, and Act.

• PDCA is a problem-solving method used in various industries.

• Plan: Identify the problem and plan a solution.

• Do: Implement the plan.

• Check: Evaluate the results and compare them to the expected outcome.

• Act: Adjust the plan and repeat the cycle.

• Example: A maintenance supervisor can use PDCA to improve the maintenance process by identifying the problem, implementing a solution, evaluating the results, an...read more

Kaizen is a Japanese term for continuous improvement.

• Kaizen involves making small, incremental changes to improve processes and increase efficiency.

• It is a key principle of lean manufacturing and is used in many industries.

• Kaizen encourages employee involvement and empowerment in the improvement process.

• Examples of kaizen include implementing a new tool or process, rearranging a workspace for better flow, or reducing waste in a process.

• Kaizen is a long-term approach to improv...read more

There are two types of electricity - AC and DC.

• AC stands for Alternating Current and is used in homes and businesses.

• DC stands for Direct Current and is used in batteries and electronic devices.

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

• AC is more efficient for long-distance power transmission, while DC is better for short distances.

• AC voltage can be easily changed using transformers, while DC voltage cannot be changed as easily.