Apco Infratech Interview Questions, Process, and Tips for Experienced

Cable tray erection in metro involves installing cable trays to support and protect electrical cables in underground transportation systems.

• Ensure proper planning and coordination with other trades to avoid conflicts during installation.

• Select appropriate cable tray materials based on the environment and load requirements.

• Follow safety regulations and guidelines to prevent accidents during installation.

• Consider factors...read more

Cable laying in tranch & cable tray involves the installation of electrical cables in underground trenches and on cable trays.

• Cable laying in tranch involves digging trenches underground to lay cables for electrical connections.

• Cable laying in cable tray involves placing cables on trays mounted on walls or ceilings for organized and safe routing.

• Proper planning and design are essential for efficient cable laying to ens...read more

Favourable zone in RCC refers to the region of a reinforced concrete member where the concrete is in compression and the steel is in tension.

• Favourable zone is the area where the concrete is able to resist compressive forces effectively.

• It is typically located at the top of a beam or slab, where the bending moment is highest.

• In this zone, the steel reinforcement helps to resist tensile forces, while the concrete resist...read more

Lap length is the length of overlap between two reinforcing bars in a concrete structure to ensure proper transfer of loads.

• Lap length is important for ensuring the continuity of reinforcement in concrete structures.

• It is typically specified in building codes and design standards.

• The lap length required depends on factors such as the diameter of the bars, concrete strength, and design loads.

• For example, in a beam, the ...read more

Lapping in reinforcement involves overlapping two reinforcement bars to ensure continuity and strength in the structure.

• Lapping is commonly used in construction to connect two reinforcement bars together.

• The length of the lap varies depending on the design requirements and the type of reinforcement used.

• Proper lapping ensures that the load is transferred effectively between the bars.

• Examples of lapping include lap spli

Bearings in bridges help distribute loads and allow for movement due to temperature changes and settlement.

• Bearings help distribute the loads from the superstructure to the substructure of the bridge.

• They allow for movement of the bridge deck due to temperature changes, wind forces, and settlement of the foundation.

• Bearings help reduce stress on the bridge components and prevent damage.

• Common types of bearings used in ...read more

Types of expansion joints include slip joints, bellows joints, and modular joints.

• Slip joints allow for movement in one direction only

• Bellows joints accommodate movement in multiple directions

• Modular joints are made up of separate components that can be replaced individually

Network is a collection of computers and other devices connected together to share resources and information.

• Network refers to the infrastructure that allows devices to communicate with each other.

• Networking involves the process of connecting devices within a network to enable communication.

• Examples of networks include LAN (Local Area Network), WAN (Wide Area Network), and the internet.

Routers are networking devices that forward data packets between computer networks. Types include wired, wireless, core, edge, and virtual routers.

• Routers are used to connect multiple networks together

• Wired routers use physical cables to connect devices

• Wireless routers use Wi-Fi to connect devices

• Core routers are used in the backbone of the network

• Edge routers connect the network to external networks

• Virtual routers are...read more

A switch is a networking device that connects devices on a local area network (LAN) and forwards data packets between them.

• Types of switches include managed switches, unmanaged switches, and layer 2/layer 3 switches.

• Managed switches allow for configuration and monitoring of network traffic.

• Unmanaged switches are plug-and-play devices with no configuration options.

• Layer 2 switches operate at the data link layer and use ...read more

OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers.

• Physical Layer: Deals with physical connections and transmission of raw data.

• Data Link Layer: Manages data frames and error detection/correction.

• Network Layer: Handles routing and logical addressing.

• Transport Layer: Ensures end-to-end communication a...read more

The execution of an elevated viaduct involves various tasks such as pile foundation, pier construction, post-tensioning girders, and bridge structures.

• Tasks include pile foundation construction for the viaduct, pier construction for support, post-tensioning of girders for strength, and bridge structure assembly.

• Activities also involve conducting load tests, NDT tests, deflection tests, and steel reconciliation for qual...read more

Using a soil compactor on GSB & WMM layers with a deadload of 12 tons or above can lead to excessive compaction and potential damage to the layers.

• Excessive compaction can result in reduced permeability of the layers, affecting drainage.

• The excessive force from the compactor can cause cracking or deformation in the layers.

• It may also lead to uneven settlement and structural instability in the pavement.

• Proper evaluation...read more

SMA layer is used in high speed expressways for its superior durability, rut resistance, and fatigue resistance.

• SMA (Stone Matrix Asphalt) layer provides superior durability compared to traditional asphalt mixes.

• SMA layer has excellent rut resistance, maintaining a smooth surface for high speed traffic.

• The high binder content in SMA enhances fatigue resistance, reducing cracking and extending pavement life.

• SMA mixtures...read more

Toe and heel are parts of a retaining wall. Toe refers to the non-earth portion while heel refers to the earth portion.

• Toe and heel are terms used in the context of retaining walls.

• Toe refers to the non-earth portion of the wall.

• Heel refers to the earth portion of the wall.

• Toe provides stability and prevents sliding of the wall.

• Heel provides support and resists the pressure exerted by the earth.

• Toe and heel are importa...read more

There are various types of concrete used in construction, each with different strength and durability characteristics.

• Concrete is classified based on its compressive strength, measured in megapascals (MPa).

• Common types of concrete include M5, M7.5, M10, M15, M20, M25, M30, M35, M40, M45, and M50.

• The number after 'M' represents the compressive strength of the concrete in MPa.

• For example, M20 concrete has a compressive s...read more

A Kuplak pipe can withstand a load of 4 tons.

• The load-bearing capacity of a Kuplak pipe is 4 tons.

• This information is specific to Kuplak pipes and may vary for other types of pipes.

• It is important to consider the weight distribution and other factors when determining the load capacity of a pipe.

• Example: A Kuplak pipe can support the weight of a small car or heavy machinery.