Purbanchal Cement Interview Questions, Process, and Tips

Starters are devices used to start and control the speed of induction motors.

• Direct On-Line (DOL) starter: provides full voltage to the motor at start

• Star-Delta starter: reduces the starting current by initially connecting the motor in star configuration

• Auto-transformer starter: uses an auto-transformer to reduce the voltage during starting

• Soft starter: gradually increases the voltage to the motor to reduce starting cu...read more

Earthing is the process of connecting electrical systems to the ground to prevent electric shock and protect equipment.

• Types of earthing include plate earthing, pipe earthing, rod earthing, and strip earthing.

• Methods of earthing include neutral earthing, equipment earthing, and system earthing.

• Earthing is essential for safety in electrical systems to prevent electric shock and damage to equipment.

• Proper earthing ensure...read more

TF stands for Transformer. It is a static device used to transfer electrical energy between two or more circuits through electromagnetic induction.

• Principle of TF involves Faraday's law of electromagnetic induction.

• Types of TF include step-up, step-down, isolation, auto-transformer, etc.

• TFs are used in power distribution, voltage regulation, impedance matching, etc.

The starting current of a DOL starter is typically 6-8 times the rated current of the motor.

• The Direct-On-Line (DOL) starter is used to start induction motors.

• The starting current of a DOL starter is usually 6-8 times the rated current of the motor.

• This high starting current can cause voltage drops and stress on the electrical system.

Choose AC cables based on current rating, insulation material, and environmental conditions.

• Consider the current rating of the cable to ensure it can handle the load

• Choose the appropriate insulation material based on the application and environment

• Take into account environmental conditions such as temperature, moisture, and exposure to chemicals

• Select the right cable size to minimize voltage drop and power loss

• Ensure c...read more

Bar bending schedule is a document that provides details of reinforcement steel bars used in construction projects.

• It includes details such as bar mark, bar size, quantity, shape, and bending dimensions.

• Helps in estimating the quantity of steel required for construction.

• Ensures proper placement and bending of reinforcement bars as per design specifications.

• Used by contractors, engineers, and construction workers for re...read more

28 days concrete strength is the standard measure of concrete's compressive strength after 28 days of curing.

• 28 days concrete strength is the standard measure of concrete's compressive strength after 28 days of curing

• It is important for assessing the quality of concrete and its ability to support structural loads

• The strength of concrete typically continues to increase beyond 28 days, but 28 days is the standard testing

Mivan is a modern construction technique using aluminum formwork, while conventional construction involves traditional methods like brick and mortar.

• Mivan is faster and more efficient than conventional construction methods.

• Mivan requires skilled labor for installation of aluminum formwork.

• Conventional construction is more labor-intensive and time-consuming.

• Mivan provides better quality finishes compared to conventional...read more

Self leveling concrete is a type of concrete that has a high flow consistency and is used to create smooth and level surfaces.

• Self leveling concrete is designed to flow easily and settle into place without the need for troweling or leveling.

• It is commonly used to level uneven floors before installing flooring materials such as tile or carpet.

• Self leveling concrete can be applied in thicknesses ranging from a featheredg...read more

The 1st Aluform mockup concreting typically takes 1-2 days to complete.

• 1-2 days is the usual timeframe for 1st Aluform mockup concreting

• Factors such as weather conditions, size of the mockup, and availability of resources can affect the duration

• Proper planning and coordination can help expedite the process

LEL stands for Lower Explosive Limit, which is the minimum concentration of a gas or vapor in air that will ignite if a source of ignition is present.

• LEL is used to determine the potential for a fire or explosion in a confined space.

• Procedures for LEL testing involve using gas detection equipment to measure the concentration of a specific gas in the air.

• If the LEL of a gas is exceeded, it indicates a potentially hazard...read more

Control of confined spaces is essential for ensuring the safety of workers in potentially hazardous environments.

• Implementing a permit-to-work system to control access to confined spaces

• Conducting thorough risk assessments before entry

• Providing appropriate training for workers on confined space entry procedures

• Using gas detectors and ventilation systems to monitor and control atmospheric conditions

• Having a rescue plan

There are mainly four grades of bitumen commonly used in construction: VG-10, VG-20, VG-30, and VG-40.

• VG-10: Suitable for low-traffic roads

• VG-20: Suitable for medium-traffic roads

• VG-30: Suitable for high-traffic roads

• VG-40: Suitable for heavy-duty traffic areas like airports and container terminals

The compressive strength of cement mortar cube at 3 days is typically around 20-25 MPa.

• Compressive strength of cement mortar cube is an important parameter to assess its quality and durability

• The strength of cement mortar increases with age, so 3 days is an early testing point

• Typical compressive strength values for cement mortar cubes at 3 days range from 20-25 MPa