
Recpdcl.ltd

Recpdcl.ltd Interview Questions and Answers
Q1. 3- what is Transformer ? Which principal it's work.?
A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.
Transformers work on the principle of electromagnetic induction
They are used to increase or decrease the voltage of an alternating current (AC) power supply
Consists of two coils of wire, primary and secondary, wrapped around a magnetic core
When AC current flows through the primary coil, it creates a magnetic field that induces a voltage in the s...read more
Q2. 4 - what is transmission Line .?
A transmission line is a specialized cable designed to carry high-frequency electrical signals with minimal loss of energy.
Transmission lines are used to transmit electrical energy from one point to another.
They are commonly used in power grids to transport electricity over long distances.
Transmission lines can be made of various materials such as copper, aluminum, or fiber optic cables.
The performance of a transmission line is affected by factors such as the length of the li...read more
Q3. 5 - Types of Motor.
There are various types of motors such as AC, DC, stepper, servo, and linear motors.
AC motors are commonly used in household appliances and industrial machinery.
DC motors are used in electric vehicles, robotics, and small household appliances.
Stepper motors are used in printers, scanners, and CNC machines.
Servo motors are used in robotics, automation, and aerospace industry.
Linear motors are used in high-speed trains, elevators, and robotics.
Q4. What is Sub and super Structure
Substructure refers to the part of a building or structure that is below ground level, while superstructure refers to the part above ground level.
Substructure includes foundation, basement, and retaining walls
Superstructure includes columns, beams, walls, and roof
Substructure is responsible for transferring loads to the ground, while superstructure provides support for the building or structure
Examples of substructure materials include concrete, steel, and masonry
Examples of ...read more
Q5. what are the various test that can be done at site for conforming the quality of the concrete
Various tests can be done at site to ensure concrete quality.
Slump test to measure consistency
Compression test to measure strength
Air content test to measure air voids
Temperature test to ensure proper curing
Rebound hammer test to measure surface hardness
Ultrasonic test to detect internal defects
Chloride ion penetration test to measure durability
Water permeability test to measure resistance to water penetration
Q6. What is switchgear Protection?
Switchgear protection is a system designed to protect electrical equipment from faults and abnormal conditions.
Switchgear protection involves detecting faults and abnormal conditions in electrical equipment.
It includes devices such as relays, circuit breakers, and fuses to isolate faulty equipment.
The protection system ensures the safety of the electrical network and prevents damage to equipment.
Examples of switchgear protection include overcurrent protection, earth fault pro...read more
Q7. Method of Estimation
Method of estimation refers to the process of calculating the approximate cost of a project or task.
Estimation can be done using various methods such as approximate quantities method, detailed estimate method, and unit rate method.
Factors such as labor cost, material cost, equipment cost, and overheads are taken into consideration while estimating.
Estimation can be done manually or using software such as AutoCAD, Excel, and Primavera.
Estimation is an important aspect of proje...read more
Q8. Ration of concrete
The ratio of concrete refers to the proportion of cement, sand, and aggregate used in the mixture.
The most common ratio of concrete is 1:2:3, which means one part cement, two parts sand, and three parts aggregate.
Other ratios include 1:1.5:3 and 1:3:6, depending on the strength and durability required for the project.
The ratio of concrete can also be adjusted based on the type of project, climate conditions, and available materials.
It is important to follow the correct ratio ...read more
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