MCQs

Decimal number 1 in binary is: 1 10 11 100 Correct answer: 1. 1

The binary system uses powers of: 2 3 4 10 Correct answer: 1. 2

Boolean algebra is based on: Symbols Truth Number Logic Correct answer: 4. Logic

The chemical used in breather of transformer is: Asbestos fibre Chlorine Silica gel Sodium chloride Correct answer: 3. Silica Gel Explanation: The chemical used in the breather of the transformer is Silica Gel. The function of a breather in transformer is to absorb moisture from air. The silica gel is a desiccant. It has good … Read more

The efficiency of a transformer will be maximum at which of following conditions: Copper losses = Iron losses Copper losses = Hysteresis losses Hysteresis losses = Eddy current losses Eddy current losses = Copper losses Correct answer: 1. Copper losses = Iron losses More MCQs on Transformer

Which one of the following is the acceptable dielectric strength of transformer oil: 1 kV 15 kV 33 kV 1500 kV Correct answer: 3. 33 kV More MCQs on Transformer

The mechanical vibrations of the transformer’s laminations depend on: Laminations Tightness Width of laminations Gauge of laminations All of these Correct answer: 4. All of these More MCQs on Transformer

The transformer core is laminated in order to reduce: Copper losses Hysteresis losses Eddy current losses All of these Correct answer: 3. Eddy current losses More MCQs on Transformer

In a transformer the energy is conveyed from primary to secondary through: Metal Air Flux none of the above Correct answer: 3. Flux Explanation: The transformer is an electrical device that changes ac electrical power from one voltage level to another through the action of the magnetic field. A transformer comprises two or more coils … Read more

Which of the following does not change in an ordinary transformer: Current Voltage Frequency All of the above Correct answer: 3. Frequency More Transformer MCQ