List of practice Questions

The regulator of an electrical fan is wound with:
Which electrical machine has the highest efficiency?
A soldering material is made up of copper and tin. If the material consists of 72% copper, then what will be the ratio of copper and tin in the material?
The power supplied to a balanced star connected load is:
When two SCRs are connected in anti-parallel combination, it is called:
A Zener diode has:
The phase difference of voltages and currents in three-phase systems is:
The equation of an alternating current is \(14\sin(1256t)\), determine the frequency.
Which of the following methods is NOT used for lighting calculations?
When DC machine achieves maximum efficiency:
With respect to wind energy, VAWT stands for:
The largest size for earthing lead is:
The ratio of the sum of individual maximum demands to the maximum demand on power station is known as:
Which of the following is NOT a part of Digital Multimeter?
The weight of substance liberated from an electrolyte in a given time is proportional to the quantity of electricity passing in that time. This is the statement of:
In DC generators, the graph between the potential difference at the terminal \(V\) and the load current \(I\), under the given conditions of excitation and speed is called:
A 20 \(\Omega\) resistance is connected across a supply of 400 V. If a resistance \(R\) is connected in parallel with the above 20 \(\Omega\) resistance, the current drawn from the supply gets doubled. The value of the unknown resistance \(R\) is:
In underground cables, the process of achieving uniformity in the dielectric stress by using layers of different dielectrics is known as:
In distribution transformer:
Direct coupled amplifiers are used to amplify:
Fires in deep fat fryers and cooking oil falls in which class of fires?
What is the maximum efficiency of full wave rectifier?
The frequency of the rotor current of a 50 Hz, 2 pole induction motor is 2 Hz, determine the percentage slip.
What is the condition for the maximum torque of 3-\(\varphi\) induction motor?
In which part of thermal power plant, the temperature of steam is raised above boiling point of water?