Kalpataru Projects International Assistant Manager - EHS Interview Questions and Answers

RCC road construction involves using reinforced concrete for durability and strength.

• RCC stands for Reinforced Cement Concrete

• Specifications include using high-quality cement, aggregates, and steel reinforcement

• Proper compaction and curing are essential for durability

• Thickness of the RCC road depends on traffic load and subgrade conditions

• Joint spacing should be as per design specifications

Building construction activities include excavation, foundation work, framing, roofing, electrical work, plumbing, and finishing.

• Excavation: Digging the foundation and preparing the site

• Foundation work: Pouring concrete and setting the foundation

• Framing: Building the structure's skeleton with wood or steel beams

• Roofing: Installing the roof materials

• Electrical work: Wiring the building for electricity

• Plumbing: Installin...read more

The work nature after agreeing to work involves designing, testing, and implementing electrical systems, troubleshooting issues, and collaborating with team members.

• Designing electrical systems based on project requirements

• Testing electrical components and systems to ensure functionality

• Implementing electrical systems in accordance with safety standards

• Troubleshooting electrical issues and providing solutions

• Collaborat

ATS stands for Automatic Transfer Switch. It is used to transfer power supply between two sources. Transformer and motor maintenance procedures and protection methods are essential for their efficient operation. SAP is a software used for enterprise resource planning.

• ATS is used to automatically switch power supply between two sources, ensuring uninterrupted power supply.

• Transformer maintenance involves regular inspect...read more

HT motor rating is the maximum power it can handle and FLC is the current it draws at full load.

• HT motor rating is expressed in kilowatts (kW) or megawatts (MW).

• FLC of HT motor is the full load current it draws at rated voltage and frequency.

• FLC is expressed in amperes (A) and varies depending on the motor's power rating and efficiency.

• For example, a 1 MW HT motor may have a FLC of 1000 A at 11 kV.

• The rating and FLC of...read more

Plant EHT system and single line diagram of plants.

• EHT system refers to Extra High Tension system used in power plants

• Single line diagram shows the electrical connections between different components

• It is important to have a clear and accurate diagram for safety and maintenance purposes

The major parts in a power transformer include the core, windings, insulation, cooling system, and tap changer.

• Core: Provides a path for magnetic flux and is usually made of laminated steel sheets.

• Windings: Consist of primary and secondary coils that transfer electrical energy.

• Insulation: Prevents electrical leakage and ensures safety.

• Cooling System: Keeps the transformer within operating temperature limits, commonly u...read more

I want to switch electrical circuits and devices.

• Switching electrical circuits to control the flow of electricity.

• Switching electrical devices on or off.

• Switching between different power sources.

• Switching between different modes or settings of electrical equipment.

• Switching between different electrical connections or configurations.

An Air Handling Unit (AHU) consists of several parts that work together to condition and circulate air.

• Filter section: Removes dust and particles from the air.

• Heating coil: Warms the air before it is distributed.

• Cooling coil: Cools the air before it is distributed.

• Humidifier: Adds moisture to the air if needed.

• Fan: Circulates the air through the AHU.

• Dampers: Control the flow of air.

• Mixing chamber: Mixes outside and ret...read more

ACPH stands for Air Changes Per Hour.

• ACPH is a measurement used to determine the rate at which the air in a space is replaced with fresh air.

• It is commonly used in HVAC systems to ensure proper ventilation and air quality.

• ACPH is calculated by dividing the volume of air in a space by the flow rate of fresh air into that space.

• For example, if a room has a volume of 1000 cubic feet and fresh air is supplied at a rate of ...read more

The recommended ACPH for a kitchen depends on the size and type of kitchen.

• The recommended ACPH for a commercial kitchen is 15-20 ACPH (air changes per hour).

• The size and type of kitchen, as well as the type of cooking equipment used, can affect the recommended ACPH.

• The ACPH can be calculated by dividing the volume of the kitchen by the airflow rate.

• Proper ventilation and exhaust systems should be in place to maintain ...read more

VAV stands for Variable Air Volume.

• VAV is a type of HVAC system that varies the airflow to different zones based on their heating and cooling needs.

• It uses dampers to control the amount of air flowing into each zone.

• VAV systems are energy-efficient and can save money on heating and cooling costs.

• They are commonly used in commercial buildings and large residential buildings.

• VAV systems can be controlled by a building au

VAV stands for Variable Air Volume. It is an HVAC system that controls the airflow to different zones based on their heating and cooling needs.

• VAV uses a series of dampers to regulate the amount of air flowing into a space.

• It measures the temperature of the air in each zone and adjusts the airflow accordingly.

• VAV systems are energy-efficient as they only supply the amount of air required to maintain the desired tempera...read more

The thumb rule to calculate water consumption in a cooling tower is 3 GPM per every 100 tons of cooling.

• Water consumption in cooling tower is calculated based on the cooling load

• The thumb rule is 3 GPM per every 100 tons of cooling

• Factors like temperature, humidity, and air flow rate affect water consumption

• Water treatment and maintenance can also impact water consumption

Parameters considered while calculating heat load in a room

• Size of the room

• Number of occupants

• Type and number of electrical appliances

• Number and size of windows

• Insulation of walls and ceiling

• Orientation of the room

• Climate of the region

Directions affect the amount of heat transferred and the efficiency of the system.

• Heat transfer is affected by the direction of the flow of fluids or gases.

• The orientation of the surface being heated or cooled affects the amount of heat transferred.

• The direction of the sun's rays can affect the heat load on a building.

• The direction of wind flow affects the heat load on a building.

• Considering directions helps in designi