10+ Vara Infrovate Interview Questions and Answers

REF relay is used for earth fault protection while differential protection relay is used for detecting internal faults.

• REF relay is used to detect earth faults in electrical systems.

• Differential protection relay is used to detect internal faults within electrical equipment.

• REF relay compares the current flowing into and out of the system to detect any imbalance caused by earth faults.

• Differential protection relay compares the current entering and leaving the equipment to dete...read more

The size of power cable for a 55Kw motor depends on factors like voltage, current, and distance.

• The size of the power cable will depend on the voltage and current rating of the motor

• The distance between the motor and the power source will also impact the size of the cable needed

• For a 55Kw motor, typically a cable size of 10mm² to 16mm² may be suitable

Vector shift in power transformers is important for maintaining phase relationship between primary and secondary windings.

• Vector shift helps in maintaining the correct phase relationship between primary and secondary windings of a power transformer.

• It ensures that the transformer operates efficiently and delivers the correct voltage to the load.

• Vector shift is crucial for preventing phase imbalances and ensuring proper functioning of the transformer.

• It is necessary for mainta...read more

Load increase and decrease in generators occur based on the demand for electricity.

• Load increase happens when more electrical appliances are turned on, requiring more power from the generator.

• Load decrease occurs when electrical appliances are turned off, reducing the power demand on the generator.

• Generators adjust their output based on the load changes to maintain a stable power supply.

• Load shedding may be implemented during peak demand to prevent overload on the generator.

• A...read more

Bleaching and washing is a process used to remove impurities and stains from materials such as textiles or paper.

• Bleaching involves the use of chemicals or natural agents to whiten or lighten the material.

• Washing is the process of rinsing the material with water to remove any remaining impurities or chemicals.

• The order of bleaching and washing may vary depending on the material and desired outcome.

• Examples include bleaching and washing of cotton fabric to remove natural color...read more

Compression testing machine is used to determine the strength of concrete. Different concrete ratios have different strength values.

• Compression testing machine is used to apply a compressive force to a concrete sample until it fails.

• The procedure involves preparing the concrete sample, placing it in the machine, and gradually increasing the load until failure occurs.

• The maximum load applied to the sample is recorded as the compressive strength of the concrete.

• Concrete strengt...read more

Refining is the process of purifying a substance to improve its quality. Degree SR refers to the level of refinement achieved. Raw materials are processed to meet quality standards.

• Refining is the process of removing impurities from a substance to enhance its purity and quality.

• Degree SR (Standard Refinery) is a measure of the level of refinement achieved in the process.

• Quality maintenance involves ensuring that the refined product meets specified standards and criteria.

• Raw m...read more

Digestar process is a method used in biotechnology to break down organic matter into simpler compounds.

• Digestar process involves the use of enzymes to break down complex molecules into smaller components.

• It is commonly used in the production of biofuels from agricultural waste.

• The process is similar to digestion in the human body, where enzymes break down food into nutrients.

Leadership qualities are essential for guiding and motivating a team towards achieving common goals.

• Effective communication skills to clearly convey expectations and provide feedback

• Ability to inspire and motivate team members to perform at their best

• Strong decision-making skills to resolve conflicts and make tough choices

• Lead by example by demonstrating professionalism, integrity, and dedication

• Empathy and emotional intelligence to understand and support team members

Yes, I am capable of performing the duties of a Shift Incharge regardless of my gender.

• Gender does not determine one's ability to perform a job effectively

• My skills, experience, and qualifications are what matter in this role, not my gender

• Diversity in the workplace can bring different perspectives and strengths to the team

I worked on a customer relationship management software.

• Developed and maintained the software using Java and MySQL.

• Implemented features such as lead management, customer profiling, and sales forecasting.

• Collaborated with the sales team to gather requirements and improve user experience.

• Provided technical support to users and resolved issues in a timely manner.

Three element drum level control is a method of controlling the water level in a steam drum using three inputs.

• The three inputs are steam flow, feedwater flow, and drum level.

• The steam flow and feedwater flow are used to calculate the rate of change of drum level.

• The drum level is then adjusted based on the calculated rate of change.

• This method provides better control than single or two element control.

• It can prevent boiler damage due to low water levels or carryover of water...read more

Limits fits and tolerances refer to the acceptable range of dimensions for mating parts in engineering.

• Limits are the maximum and minimum acceptable dimensions for a part

• Fits refer to the clearance or interference between mating parts

• Tolerances are the allowable deviation from a specified dimension

• Examples: H7/g6, H8/f7, etc.