30+ S D Corporation Interview Questions and Answers

The procedure for fixing false ceiling involves several steps including measuring, marking, framing, and installation.

• Measure the area where the false ceiling will be installed

• Mark the area with chalk or pencil

• Frame the area with metal channels or wooden battens

• Install the false ceiling tiles or panels onto the frame

• Finish the edges with trim or molding

During a door frame factory visit for teak and miranti frame, we need to check for quality, dimensions, moisture content, and finishing.

• Check the quality of the wood used for the frame

• Check the dimensions of the frame to ensure it fits the door properly

• Check the moisture content of the wood to ensure it is not too high or too low

• Check the finishing of the frame to ensure it is smooth and even

• Ensure that the frame is free from any defects or damages

The breaker size on LT side for a 2000kVA transformer will depend on the specific requirements of the transformer and the system it is connected to.

• The breaker size on the LT side of a transformer is typically determined based on the transformer's full load current (FLC) and the system's short circuit current rating.

• Factors such as the type of protection required (thermal, magnetic, or both), the type of system (single-phase or three-phase), and the voltage level will also in...read more

The most common waterproofing used in water tanks is cementitious waterproofing.

• Clean the surface of the tank and make sure it is free from any debris or dirt.

• Apply a coat of primer to the surface of the tank.

• Mix the cementitious waterproofing material with water according to the manufacturer's instructions.

• Apply the first coat of waterproofing material using a brush or spray gun.

• Allow the first coat to dry completely before applying the second coat.

• Apply the second coat of w...read more

The thickness of medium duty PVC conduit is typically around 1.5mm to 2mm, while heavy duty PVC conduit can range from 2.5mm to 3mm.

• Medium duty PVC conduit thickness: 1.5mm to 2mm

• Heavy duty PVC conduit thickness: 2.5mm to 3mm

Vitrified tiles are denser and more durable than ceramic tiles.

• Vitrified tiles are made by fusing clay and silica at high temperatures, resulting in a non-porous and harder surface.

• Ceramic tiles are made by baking a mixture of clay and other natural materials at lower temperatures.

• Vitrified tiles are more resistant to stains, scratches, and moisture than ceramic tiles.

• Ceramic tiles are more affordable than vitrified tiles.

• Vitrified tiles are commonly used in high-traffic area...read more

Cable size is calculated based on the load requirements to ensure safety and efficiency.

• Calculate the total load in amperes (A) by adding up the individual loads of all connected devices.

• Determine the voltage (V) of the circuit.

• Use the formula: Cable size (mm²) = (2 x length x current) / (voltage drop x cos θ)

• Consider factors such as voltage drop, ambient temperature, and installation method when selecting cable size.

• For example, if the total load is 50A and the voltage is 22...read more

The module used in flow switch is a reed switch.

• Reed switch is commonly used in flow switches to detect the flow of liquid or gas.

• It consists of two metal reeds inside a glass tube that are magnetically actuated.

• When the flow of fluid moves the reeds, they come into contact and complete an electrical circuit.

• This triggers the switch to indicate the presence of flow.

• Reed switches are reliable and have a long operational life.

• Examples of flow switches using reed switches includ...read more

Mix design is the process of determining the proportions of cement, water, aggregates, and admixtures in concrete to achieve desired properties.

• Determine the required strength and durability of the concrete

• Select suitable materials such as cement, aggregates, water, and admixtures

• Calculate the proportions of each material based on desired properties and specifications

• Perform trial mixes to test the properties of the concrete

• Adjust the mix design as needed to meet project requ...read more

Rate analysis for tile flooring and cladding involves calculating the cost of materials, labor, and other expenses.

• Determine the area to be covered by the tiles

• Calculate the cost of tiles per square foot/meter

• Estimate the cost of labor and other expenses such as adhesive, grout, and sealant

• Add all the costs to get the total cost of the project

• Compare the cost with the budget to ensure it is feasible

Extra items for WO amendment can be found by reviewing project specifications, consulting with stakeholders, conducting site visits, and analyzing previous change orders.

• Review project specifications for any missed items or changes

• Consult with stakeholders such as architects, engineers, and contractors for input

• Conduct site visits to identify any additional work required

• Analyze previous change orders to see if any items were missed or need to be revised

Consider JMR based on project specifications, quantities, rates, and market conditions.

• Review project specifications to ensure accurate billing

• Verify quantities of materials and work done

• Check rates for labor, materials, and equipment

• Consider market conditions for pricing accuracy

Dyn 11 is a transformer connection where the primary winding is connected in delta and the secondary winding is connected in star with neutral grounded.

• Dyn 11 is a common transformer connection used in power distribution systems.

• In Dyn 11 connection, the primary winding is connected in delta configuration while the secondary winding is connected in star configuration with neutral grounded.

• This configuration provides a stable output voltage and allows for phase shifting capabi...read more

Veneer doors are made of thin slices of real wood while laminated doors are made of synthetic materials.

• Veneer doors have a natural wood grain and texture while laminated doors have a smooth and consistent appearance.

• Veneer doors are more expensive than laminated doors.

• Laminated doors are more durable and resistant to scratches and moisture than veneer doors.

• Veneer doors require more maintenance and care than laminated doors.

• Examples of veneer wood include oak, maple, and che...read more

M25 concrete is a type of concrete with a compressive strength of 25 megapascals (MPa).

• M25 concrete is commonly used in construction projects.

• It is a mix of cement, sand, and coarse aggregates in a specific ratio.

• The ratio of cement to sand to coarse aggregates in M25 concrete is 1:1:2.

• The compressive strength of M25 concrete is achieved after 28 days of curing.

• M25 concrete is suitable for various applications such as foundations, beams, columns, and slabs.

Transformers cannot be synchronized due to differences in frequency, phase angle, and voltage levels.

• Transformers have different frequency ratings which prevent them from being synchronized.

• Phase angle differences between transformers also make synchronization impossible.

• Voltage levels may vary between transformers, further complicating synchronization.

• Synchronization requires identical parameters in order to operate efficiently.

Power factor is a measure of how effectively electrical power is being used in a system.

• Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical system.

• It indicates how efficiently power is being converted into useful work.

• A power factor of 1 indicates all power is being used effectively, while a lower power factor means some power is being wasted.

• Power factor correction can be used to improve efficiency and reduce energy costs.

RMC reconciliation involves comparing the quantity of materials ordered with the quantity used in construction to ensure accuracy.

• Collect all the data related to RMC (Ready Mix Concrete) orders and deliveries.

• Compare the quantity of RMC ordered with the quantity actually used in construction.

• Identify any discrepancies and investigate the reasons behind them.

• Adjust the records accordingly to ensure accurate billing and inventory management.

RFI stands for Request for Information and it is raised when there is a need for clarification or additional information.

• RFI is a formal written request that seeks clarification or additional information on a particular issue or item.

• It is usually raised when there is a discrepancy or ambiguity in the project documents or specifications.

• RFI can be raised by any member of the project team, including the contractor, architect, or engineer.

• The RFI process involves documenting th...read more

Synchronization is the coordination of events to operate in unison.

• Synchronization ensures that different components or processes work together smoothly

• It prevents conflicts or errors that may arise from simultaneous actions

• Examples include synchronizing data between multiple devices, coordinating traffic signals, and aligning audio and video in multimedia applications

Paint measurements can be checked using a paint thickness gauge to ensure compliance with specifications.

• Use a paint thickness gauge to measure the thickness of the paint layer.

• Compare the measured thickness with the specified thickness in the project specifications.

• Ensure that the paint thickness is uniform across the surface.

• Repeat the measurements at multiple points to ensure accuracy.

• Adjust the paint application if the measurements do not meet the specifications.

There are two main types of cooling in transformers: oil cooling and air cooling.

• Oil cooling involves circulating oil within the transformer to dissipate heat.

• Air cooling uses fans to blow air over the transformer coils to cool them down.

• Oil cooling is more efficient but requires more maintenance, while air cooling is simpler and cheaper.

• Examples of oil-cooled transformers include distribution transformers, while power transformers often use air cooling.

The duration for 1st floor slab and approval by CIDCO depends on various factors.

• The duration for slab depends on the size and complexity of the slab, as well as the availability of resources.

• Approval by CIDCO also depends on various factors such as compliance with building codes and regulations.

• It is best to consult with a qualified engineer or contractor for a more accurate estimate of duration and approval process.

• Factors such as weather conditions, site accessibility, and...read more

IDMT relay stands for Inverse Definite Minimum Time relay, used for protection in electrical systems.

• IDMT relay is a type of protective relay used in electrical systems.

• It operates based on the principle of inverse time characteristics.

• The relay operates faster for higher fault currents and slower for lower fault currents.

• IDMT relays are commonly used for overcurrent protection in power systems.

• They are designed to trip the circuit breaker when a fault is detected to prevent ...read more

BBS (Bar Bending Schedule) is calculated by determining the quantity of steel reinforcement required for a particular concrete structure.

• Calculate the total length of bars required for each diameter and type of reinforcement.

• Determine the number of bars required for each diameter and type of reinforcement.

• Calculate the total weight of bars required for each diameter and type of reinforcement.

• Prepare a detailed schedule showing the type, diameter, length, and weight of each ba...read more

There are mainly two types of fire alarm systems: Conventional and Addressable.

• Conventional fire alarm system: divides the building into zones with detectors and manual call points connected to a central control panel.

• Addressable fire alarm system: each device has a unique address, allowing for specific identification of the location of a fire or fault.

• Other types include wireless fire alarm systems, aspirating smoke detection systems, and intelligent fire alarm systems.

Penetration test is a method of evaluating the security of a computer system or network by simulating an attack from a malicious source.

• Penetration test involves identifying vulnerabilities in a system or network.

• It includes attempting to exploit these vulnerabilities to determine the potential impact of a real attack.

• The goal of a penetration test is to strengthen the security defenses of the system or network.

• Common tools used in penetration testing include Metasploit, Nmap...read more

Waterproofing is a process of making a structure or material resistant to the penetration of water.

• Waterproofing involves applying materials or coatings to prevent water from seeping through surfaces.

• It is commonly used in construction to protect buildings from water damage.

• Examples of waterproofing materials include bituminous coatings, cementitious waterproofing, and liquid membrane systems.

Safety standards are guidelines and regulations set by organizations or governments to ensure the safety of individuals in various environments.

• Safety standards are established to prevent accidents and injuries in the workplace or other settings.

• These standards often include specific codes and regulations that must be followed to maintain a safe environment.

• Examples of safety standards with reference codes include OSHA regulations in the United States or ISO standards interna...read more

Standard deviation is a measure of the amount of variation or dispersion of a set of values from its mean.

• Standard deviation of M25 concrete is a measure of the variation of compressive strength values of M25 grade concrete.

• It is calculated using the formula: σ = √(Σ(xi - x̄)² / n), where σ is the standard deviation, xi is the individual value, x̄ is the mean value, and n is the number of values.

• The standard deviation of M25 concrete is typically around 4-5 N/mm².

• It is importan...read more

Mivan formwork is a construction technique that uses aluminum formwork system for casting concrete structures.

• Mivan formwork involves setting up aluminum formwork panels, fixing reinforcement bars, pouring concrete, and removing the formwork after the concrete has set.

• It is a fast and efficient construction method commonly used for high-rise buildings and large residential projects.

• The system allows for smooth finishes and reduces the need for plastering.

• Mivan formwork is kno...read more

Grade of concrete at site refers to the strength of the concrete mix used in construction.

• Grade of concrete is specified by its compressive strength in megapascals (MPa) at 28 days.

• Common grades of concrete include M20, M25, M30, etc.

• Higher grade concrete indicates higher strength and durability.

• The grade of concrete is determined by the mix design and testing of samples.

• For example, M25 grade concrete has a compressive strength of 25 MPa after 28 days.