Management, Technical

Management, Technical Interview Questions and Answers

Updated 19 Nov 2015

Q1. Why transmission at high voltage is preferred than at low voltage?

Ans.

Transmission at high voltage is preferred due to lower power losses and reduced infrastructure costs.

High voltage transmission reduces power losses during transmission.
Lower current at high voltage reduces resistive losses in transmission lines.
High voltage transmission allows for longer transmission distances without significant power losses.
Reduced power losses result in higher efficiency and lower energy costs.
High voltage transmission requires less infrastructure, such as...read more

Ans.

The most basic machine for an Electrical Engineer is the DC generator.

DC generator is a machine that converts mechanical energy into electrical energy.
It consists of a rotor, stator, and commutator.
DC generators are used in various applications such as power plants, electric vehicles, and portable generators.

Ans.

Shortest path algorithm finds the shortest path between two points in a graph.

Use Dijkstra's algorithm or A* algorithm to find the shortest path
Create a graph with nodes and edges representing the points and distances between them
Assign weights to the edges based on the distance between the points
Run the algorithm to find the shortest path between the desired points

Ans.

Rise time, fall time, and propagation delay are important concepts in signal processing.

Rise time is the time taken by a signal to rise from 10% to 90% of its maximum value.
Fall time is the time taken by a signal to fall from 90% to 10% of its maximum value.
Propagation delay is the time taken by a signal to travel from the input to the output of a system.
Propagation delay is affected by the length of the transmission line, the speed of the signal, and the characteristics of t...read more

Are these interview questions helpful?

Ans.

The synchronous speed of a 4 pole synchronous machine is 1800 RPM.

Synchronous speed is the speed at which the magnetic field rotates in a synchronous machine
It is given by the formula: Synchronous speed = (120 * Frequency) / Number of poles
For a 4 pole machine, with a frequency of 60 Hz, the synchronous speed is 1800 RPM

Ans.

Linked lists and trees are data structures used to store and organize data.

Linked lists are a collection of nodes that contain data and a reference to the next node.
Trees are a collection of nodes that contain data and references to child nodes.
Binary trees are a type of tree where each node has at most two child nodes.
Binary search trees are a type of binary tree where the left child node is less than the parent node and the right child node is greater than the parent node.
B...read more

Share interview questions and help millions of jobseekers 🌟

Ans.

DC series and DC shunt motors are types of direct current motors used in various applications.

DC series motors have high starting torque and are used in applications like electric traction systems.
DC shunt motors have a constant speed and are used in applications like conveyor belts and machine tools.
DC series motors have a series field winding connected in series with the armature winding.
DC shunt motors have a shunt field winding connected in parallel with the armature wind...read more

Ans.

An induction motor works on the principle of electromagnetic induction to convert electrical energy into mechanical energy.

An alternating current is supplied to the stator windings, creating a rotating magnetic field.
The rotating magnetic field induces a current in the rotor windings, which in turn creates a magnetic field.
The interaction between the stator and rotor magnetic fields causes the rotor to rotate.
The speed of the rotor is slightly less than the speed of the rotat...read more