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I applied via Naukri.com and was interviewed in Mar 2024. There was 1 interview round.
A pump is a mechanical device used to move fluids from one place to another.
Pumps are commonly used in various industries such as water treatment, oil and gas, and manufacturing.
There are different types of pumps including centrifugal pumps, diaphragm pumps, and gear pumps.
Pumps can be powered by electricity, engines, or manual operation.
Examples of pumps include water pumps used in households, fuel pumps at gas statio...
Centrifugal pump works by converting mechanical energy from a motor into kinetic energy in the fluid being pumped.
Centrifugal force is created by the rotation of the pump impeller, which pushes the fluid towards the outer edges of the pump casing.
The kinetic energy of the fluid increases as it moves through the pump, creating pressure that forces the fluid out of the pump discharge.
Common applications of centrifugal pu...
Pressure regulating valve maintains a constant pressure downstream, while pressure reducing valve reduces the pressure from a higher level to a lower level.
Pressure regulating valve maintains a constant pressure downstream by adjusting the flow rate through the valve.
Pressure reducing valve reduces the pressure from a higher level to a lower level, ensuring it stays within a specific range.
Pressure regulating valves ar...
A DC valve is a type of valve that controls the flow of direct current (DC) electricity in a circuit.
DC valves are used to regulate the flow of DC current in various applications.
They can be either normally open or normally closed, allowing or blocking the flow of current respectively.
DC valves are commonly used in hydraulic systems, automotive applications, and industrial machinery.
Examples of DC valves include soleno...
Pascal's law states that a change in pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and to the walls of its container.
Pressure applied to a confined fluid is transmitted equally in all directions.
The principle is used in hydraulic systems to generate mechanical force.
Example: Hydraulic car brakes work based on Pascal's law.
Example: Hydraulic lifts use Pascal's law to lift...
Pressure point of a gear is the point where the maximum force is applied to transmit power.
Pressure point is where the teeth of two gears come into contact.
It is the point where the force is exerted to transmit power from one gear to another.
Proper lubrication and maintenance of pressure points are essential for smooth gear operation.
Module of a gear refers to the ratio of the pitch diameter to the number of teeth on the gear.
Module is a key parameter in gear design and is used to determine the size of the gear teeth.
It is calculated as the ratio of the pitch diameter to the number of teeth on the gear.
Common modules include 1, 1.5, 2, 2.5, etc.
Higher module values indicate larger gear teeth and vice versa.
The lubricant oil used in hydraulic systems is hydraulic oil, and the suitable grade depends on the specific requirements of the system.
Hydraulic oil is specifically designed for use in hydraulic systems to provide lubrication, cooling, and sealing.
The grade of hydraulic oil depends on factors such as operating temperature, pressure, and system design.
Common grades of hydraulic oil include ISO VG 32, ISO VG 46, and ISO...
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I applied via Approached by Company and was interviewed before Nov 2022. There were 2 interview rounds.
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.
Ohm's law is represented by the formula V = IR, where V is voltage, I is current, and R is resistance.
It helps in calculating the current, voltage, or resistance in a circuit when the other two values are known.
For example, if a circuit has a volt...
posted on 25 May 2024
posted on 28 Aug 2021
I applied via Walk-in and was interviewed before Aug 2020. There was 1 interview round.
I applied via Company Website and was interviewed before Jun 2021. There were 3 interview rounds.
The diameter of binding wire used in construction varies depending on the type of construction work.
The diameter of binding wire used in construction ranges from 0.9 mm to 1.6 mm.
Thicker binding wire is used for heavy-duty construction work.
Thinner binding wire is used for lighter construction work.
The most commonly used binding wire diameter in construction is 1.2 mm.
The diameter of binding wire is important as it aff...
The aim of construction in site is to create a safe, functional and aesthetically pleasing structure.
Ensure safety of workers and public
Meet functional requirements of the structure
Create an aesthetically pleasing design
Use appropriate materials and techniques
Adhere to building codes and regulations
The minimum grade of RCC is M20.
RCC stands for Reinforced Cement Concrete.
The grade of RCC is determined by the compressive strength of concrete.
M20 grade means the compressive strength of concrete is 20 N/mm².
Higher grades of RCC are used for structures that require higher strength, such as bridges and high-rise buildings.
PSC is pre-stressed concrete while RCC is reinforced concrete.
PSC has pre-stressed steel while RCC has reinforcing steel.
PSC is stronger and more durable than RCC.
PSC is used in bridges, high-rise buildings, and other structures that require high strength and durability.
RCC is used in residential and commercial buildings, bridges, and other structures that require moderate strength and durability.
Minimum steel diameter depends on various factors such as load, span, and type of structure.
Minimum steel diameter is determined by the design engineer based on the load and span of the structure.
The type of structure also plays a role in determining the minimum steel diameter.
For example, a bridge would require a larger diameter steel than a residential building.
The minimum steel diameter is also influenced by the typ...
Several tools are required for pile installation on site.
The number of tools required for pile installation depends on the type of pile being installed.
Some common tools required for pile installation include pile hammers, augers, drilling rigs, cranes, and vibratory hammers.
The number of tools required also depends on the size and depth of the pile being installed.
Other factors such as soil conditions and accessibilit...
posted on 15 Mar 2025
I appeared for an interview before Mar 2024, where I was asked the following questions.
The output voltage of a VFD varies based on frequency and load, typically ranging from 0 to the input voltage.
VFD output voltage is adjustable, allowing control over motor speed and torque.
The output voltage is proportional to the frequency; as frequency increases, voltage increases.
Commonly, VFDs output a three-phase voltage to drive three-phase motors.
For example, a 480V VFD can output up to 480V at its maximum frequ...
Motor protection involves safeguarding electric motors from damage due to overloads, short circuits, and other electrical faults.
Overload protection prevents motors from drawing excessive current, which can cause overheating.
Short circuit protection disconnects power when a fault occurs, preventing damage to the motor and connected equipment.
Phase failure protection detects loss of one or more phases, which can lead to...
Flow transmitters are devices used to measure the flow rate or quantity of a fluid in a pipe or duct.
Differential pressure flow meters
Magnetic flow meters
Ultrasonic flow meters
Vortex flow meters
Coriolis flow meters
I applied via Job Portal and was interviewed in Mar 2022. There was 1 interview round.
Wiring and boards are essential components of electrical systems.
Wiring refers to the physical connections between electrical components.
Boards are used to organize and control the flow of electricity.
Proper wiring and board design are crucial for safety and efficiency.
Examples of boards include circuit breaker panels and control boards for industrial machinery.
Electrical maintenance involves regular inspections, repairs, and upgrades to ensure safe and efficient electrical systems.
Routine inspections to identify wear and tear, such as checking circuit breakers and wiring.
Testing and replacing faulty components, like light fixtures or outlets.
Upgrading systems to meet current codes, for example, installing GFCI outlets in wet areas.
Performing preventive maintenance to avoid f...
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