In this post, we are going to read you “Important Transformer Objective Questions Answers” | These questions are of multiple choice type which you can use for your practice.

Transformer Objective Questions and Answers
01. Static Electromagnetic Induction is Adopted in the following AC Machine ?
- Generators
- Alternators
- Transformer
- All Of The Above
02. The Function of a Transformer is to –
- increase or Decrease DC Voltage
- Increase or Decrease AC Voltage
- Increase or Decrease Frequency of AC Voltage
- None of the Above
03. The Silica Gel in a Breather of a Transformer is –
- To Prevent Entry of Dust to the Transformer
- To Prevent Entry of Moisture into the Transformer
- To maintain the oil level
- To Avoid Overflow of oil
04. The Principle Of Mutual Induction is Used in –
- transformer
- DC Motor
- DC Generator
- Synchronous Motor
05. Regulation of a Transformer Depends On –
- Precentage of load
- Power factor of load
- Independent of load
- load has no effect on regulation
06. if the Transformer oil is cooled using a fan blowing the air throght the radiator tubes the name plate may Contain
- ONAN
- OFAF
- ONAF
- OFAN
07. The Transformer Ratio of a Transformer is given By –
- N2/N1
- V2/V1
- I1/I2
- All of the above
08. dynamic Inductance is Not Adopted in –
- DC Generator
- AC Generator
- DC & AC Generator
- Transformer
09. One of the Important Qualities of the Oil used In the Transformer is –
- High Dielectric Strngth
- High Viscosity
- High Viscosity Index
- Low Pour Point
10. The Purpose of providing oil in the Transformer is to
- Provide Cooling
- Provide Cooling and Insulation
- Provide Insulation
- Avoid Overloading
11. Generators and Transformer Works on The principle of –
- Faraday’s Laws of Electromagnetic Induction
- Neuton Law of motion
- Faraday’s Laws of Electrolysis
- None of the Above
12. In the Use of Current Transformer one Important Aspect to be kept in mind is –
- Its Temprature Should be Continously Monitored
- Its Secondary Should Never Be Opened and Always it Should be Connected with some burden
- It Should Be oil immersed Always
- It Should not be used for high voltage systems
13. ………… Welding Machine is Used in Resistance Welding –
- Welding Generator
- Step Down Transformer
- Step Up Transformer
- Rectifier Welding Machine
14. The Welding Transformer is a ……….. Type
- Step Up Transformer
- Self Induced
- Step Down
- None Of The Above
15. The Input Side of the Single phase transformer is called as ……….
- Primary Side
- Secondary Side
- High Voltage Side
- Low Voltage Side
16. In Which Material Core of the Transformer is Constructed ?
- Silicon Iron Steel
- Mild Steel Iron
- Carbon Steel Iron
- Pig Iron Steel
17. If The Full Load Iron Loass of the transformer is 1000 watt, what will be the iron loass at half load ?
- 125 watt
- 250 watt
- 500 watt
- 1000 watt
18. The Standard Values of Rated Secondary Current Of The Current Transformer is …..
- 2 Amp
- 3 Amp
- 5 Amp
- 10 Amp
19. What Will Be the Colour of the silica Gel, After it absorbs moistrue from air ?
- Blue
- Brown
- Violet
- Pink
20. The Output Side of the Single Phase Transformer is Called as …
- Secondary
- Primary
- Starting
- Running
# Transformer Objective Questions ans Answers
Also Read :-
- 3 phase induction motor MCQ
- Alternator MCQ
- Basic Electrical Engineering MCQ
- Basic Electrical MCQ
- Cell and Battery MCQ
- DC Generator MCQ
- Electrical Wiring MCQ
Electrical Engineering mcq
01. The Resistance of Value R Ohms each are Connected in delta the equivalent star will have each resistance of value
- R ohm
- R/3 ohm
- Root 3 R Ohm
- 3R Ohm
02. The Domestic Installation is Connected in ….
- Series
- Series – Parallel
- Parallel- Series
- Parallel
03. The Peak Factor of the sinusoidally varying quantity is –
- 1.732
- 1.414
- 1.11
- 0.707
04. The Standard Power Supply Frequency in Our Country is
- 25Hz
- 50H
- 60Hz
- 100HZ
05. The Power Consumed By a Coil is 300w, When 30v dc us applied and 108w when 30v ac is applied the reactance of the coil will be
- 3 ohm
- 4 ohm
- 5 ohm
- None of these
06. One of the two wattmeter connected to measure the power in a balanced 3 phase load will indicated zero when load pf is
- Zero
- Unity
- 0.5
- None of these
07. Three Similar inductive coil of resistance 20ohm and reactance of 30 ohm are connected in mesh across a 3 phase 400v supply, what will be phase current
- 11.1
- 1.11
- 111
- 0.111
08. Three Delta Connected Impedance Z=(30+40j) ohm per phase are connected across 398.36v, 3 phase supply what will be the power
- 571.2865w
- 57.12865w
- 5712.86w
- 5.71w
09. Which of the following is not a main part of rivet
- Head
- Shank
- Point
- Thread
10. The amount by which the two rods to be joined are drawn togather is called a
- Draw
- Portrary
- Lead
- Pitch
11. Empire tape is
- Varnished cambric
- Valcanised Rubber
- Impregnated Paper
- None Of these
12. Which Of the Following insulation is used in cable?
- Varnished Cambric
- Rubber
- Paper
- Any of these
13. Pressure cable are generally not used beyound
- 11 KV
- 33 KV
- 66 KV
- 132 KV
14. Copper as conductance for cable is used as
- Annealed
- Hardness and Temperature
- Hard Drawn
- Alloy with chromium
15. The Breakdown voltage of a cable depends on
- Pressure of moisture
- Working temperature
- Time of application of the voltage
- All of these
16. The Surge Resistance of cable is
- 5 ohm
- 20 ohm
- 50 ohm
- 100 ohm
17. Low Tension Cables are Generally used upto
- 200 volt
- 500 volt
- 700 volt
- 1000 volt
18. The Proces of producing chemical Decomposition of a compound by passing electricity through through the compound is called
- Electrolysis
- Electroplating
- Electrolyte
- None Of these
19. Which the property of the electricity is responsible for the use of fuse wire in household wiring
- Chemical Effect
- Heating Effect
- Magnetic Effect
- All of these
20. Which of the following is bad conductor of electricity
- Distilled Water
- Alcohal
- Salt Water
- Tap Water
21. When Electric Current is passed Through Copper sulphate solution the copper decomposition takes place on the electrode connected to
- Positive Terminal of the battery
- Negative Terminal of the battery
- Any Terminal
- None Of these
22. When Electric Current is passed through bulb, the bulb give light because of
- Electric Effect of Current
- Heating Effect of current
- Glowing Effect of current
- Light Effect of current
23. Type of wire Depends on
- Location and consumer budget
- Durability and cost
- safety
- All off these