Uppcl Je Electrical Question Paper: While preparing for any exam, you should look at the question paper of that exam so that you will know what type of questions were asked in this exam. So if you are preparing for Uppcl Je Electrical, then in this post we are giving you a question paper of Uppcl Je Electrical which you can solve yourself and improve your preparation and along with it its answers are given so that you will also get its correct answer.
Uppcl Je Electrical Question Paper
1. Which of the following elements gives blue glow when used as the surface of CRO?
•Copper impurity with zinc sulfide
•Silver impurity with zinc sulfide
•Utrium oxide
•Pure zinc sulfide
Answer: Zinc sulphide with silver impurity
2. A conducting SCR can be opened by reducing…………to zero?
•Supply current
•Supply potential
•Anode current
•Grid potential
Answer: anode current
3. What is the function of a measuring system?
•Indicating function
•Recording function
•Control function
•Indicating, recording and controlling function
Answer. Indicating, recording and controlling function
4. A 60 amp, 220 volt energy meter makes 51 revolutions in 35 seconds at full load. Calculate the percentage error (in %), if the meter constant is 420 revolutions/kWh.
•4.23
•5.13
•7
•8.93
Answer: 5.13
5. Which coolant is not generally used for fast beader reactor?
•Water
•Liquid metal
•Helium
•Carbon dioxide
Answer: Water
6. Which property of a substance opposes magnetic flux?
•पारगमन
•संधारिता
•प्रेरकत्व
•प्रतिष्टम्भ
Answer: reluctance
7. Loss related to mechanical friction of a machine is called……..?
•Eddy current loss
•Mechanical loss
•Stray load loss
•Slackness (hysteresis) loss
Answer: mechanical loss
8. Some of the various types of modern methods of welding are
•Ultrasonic welding and resistance welding
•Resistance welding and arc welding
•Laser welding and ultrasonic welding
•Arc welding and ultrasonic welding
Answer: Laser welding and ultrasonic welding
9. In heavy duty steel construction cranes with wide load shifting –
•It is a DC series motor
•It is a simple cage induction motor
•It is a wound-rotor induction motor
•It is a synchronous motor
Answer: DC series motor
10. In which conditions does the isolator work?
•Load condition
•Fault condition
•No current condition
•Short circuit condition
Answer: no current state
11. Name the device which runs on alternating current?
•Motor
•Generator
•Prime mover
•Fan
Answer: Prime mover
12. What happens in 8085 when REST IN signal goes low?
•Program counter is set to zero
•Buses are tristate
•MPU is reset
•All of the above
Answer: MPU is reset
13. The coordination number of molecules in hexagonal close packed structure is?
•4
•6
•8
•12
Answer: 12
14. In power electronics –
•DC to AC conversion circuits are called converters and AC to DC are called inverters
•DC to DC conversion circuits are called converters and AC to DC are called inverters
•DC to DC conversion circuits are called converters and DC to AC are called inverters •AC to DC conversion circuits are called converters and DC to AC are called inverters
•AC to DC conversion circuits are called converters and DC to AC are called inverters
Answer. AC to DC conversion circuits are called converters and DC to AC are called inverters
15. What will be the voltage level of single phase supply for domestic consumer?
•220V
•210V
•230V
•240V
Answer: 230V
16. A wattmeter is used to measure……..?
•Only AC
•Only DC
•Both AC and DC
•Both AC and DC voltage
Answer: Both alternating and direct electric power
17. Determine the magnetic potential intensity of a magnet (in ampere/meter) when the pole strength of the magnet is 30 ampere-meter and the pole radius of the magnet is 2 square meters?
•60
•30
•25
•15
Answer: 15
18. Which of the following motors will be used in electric clocks?
•D.C. series motor
•D.C. shunt motor
•A.C. synchronous motor
•A.C. induction motor
Answer: AC synchronous motor
19. Which material is used to make knife switches?
•Nickel
•Aluminium
•Brass
•Nichrome
Answer: Brass
20. The function of economizer in thermal power plant is?
•To extract heat from burnt gases and use it to heat water going to the boiler
•To liquefy the steam coming out of the turbine
•To remove carbon particles from the flue gases
•To increase the temperature of the steam coming from the boiler before sending it to the turbine
Answer: Extracting heat from the burnt gases and using it to heat the water going to the boiler
21. Determine the value of load resistance (in ohms) for a circuit when the maximum power transfer from a 50 volt source to the load is 25 watts?
•50
•40
•35
•25
Answer: 25
22. The fluorescent substance zinc silicate used in fluorescent tubes provides ………….. colour?
•Green
•Yellow
•Pink White
•Black Smoke
Answer: Green
23. Which of the following is immobile?
•Electron
•Hole
•Ion
•None of these
Answer: Ion
24. The load pattern of an industrial consumer is 0.8 lag 2000 W for 12 hours and unit power factor 1000 W for 12 hours. What will be the load factor?
•0.5
•0.75
•0.6
•2
Answer: 0.6
25. The high voltage transmission line starting from the generation point is called ………..?
•Secondary transmission
•Secondary distribution
•Primary transmission
•Primary transmission
Answer: primary transmission
26. Which should not have an earthing pit?
•Road
•Railway track
•Footpath
•All options are correct
Answer: All options are correct
27. Which of the following is the SI unit of magnetic field strength?
•Weber
•Tesla
•Ampere-meter
•Ampere/meter
Answer: ampere/meter
28. Which of the following statements is incorrect regarding repulsion start induction motor?
•It requires more maintenance of commutator and other mechanical equipment
•It makes a lot of noise while starting
•It has replaced capacitor motors in fractional horsepower motors
•It cannot be easily reversed
Answer. It has replaced capacitor motors in fractional horsepower motors
29. Which of the following multivibrators is also called free running multivibrator?
•Astable Multivibrator
•Stable Multivibrator
•Bistable Multivibrator
•Both Stable and Bistable Multivibrators
Answer. Astable multivibrator
30. In a positive logic system, logic 1 represents?
•Zero level
•Low voltage level
•High voltage level
•Negative voltage
Answer: High voltage level
31. D.C. Shunt Generator
•Self-excited
•Series excited
•Shunt excited
•Isolated excited
Answer: It is spontaneously excited
32. What is the function of starting in an electric motor?
•Starting
•Avoid overloading
•Reduce high starting current
•All of the above
Answer: Reducing the high starting current
33. At what loading angle is the power generated by a synchronous motor maximum?
•45°
•90°
•120°
•0°
Answer: 90°
34. In dc generators, wave winding is used in which type of machines?
•High voltage low current
•High current low voltage
•High voltage high current
•Low voltage low current
Answer. High voltage low current
35. Field weakness control method is used for:
•For speed less than prescribed
•For speed more than prescribed
•None of these
•For both speed less than prescribed and speed more than prescribed
Answer: For more than the prescribed speed
36. If the peak value of voltage is 120 volts then determine the average value (in volts) of the alternating voltage?
•76.44
•86.34
•110.34
•188.38
Answer: 76.44
37. A differential amplifier has a voltage difference gain of 2000 and a common mode gain of 0.2. The value of CMMR in decibels (dB) is?
•10,000 dB
•80dB
•200dB
•100dB
Answer: 80dB
38. If negative feedback is used in an amplifier circuit, then ………occurs.
•Increased distortion
•Increased gain
•Less distortion
•No effect on distortion
Answer: Low distortion
39. The decimal form of binary number 0110 is?
•4
•5
•6
•7
Answer: 6
40. Calculate the value of shunt resistance (in ohms) required to convert a galvanometer into an ammeter reading 15 amperes. The internal resistance of the galvanometer is 30 ohms and the current required for full scale deflection is 0.3 amperes?
•0.84
•0.74
•0.61
•0.52
Answer: 0.61
41. Which principle is used in street lighting?
•Diffusion and regular reflection
•Induction
•Electromagnetic
•Electrostatic
Answer: Diffusion and regular reflection
42. What is the effect on diode current when the incident light intensity in a forward biased photo diode is increased?
•It decreases
•It increases
•It remains constant
•Cannot be said
Answer: It increases
43. At what load power factor is zero voltage regulation achieved in a transformer?
•Zero
•Leading
•Lagging
•Unity
Answer. pioneer
44. Which of the given losses is proportional to the square of the speed?
•Air friction loss
•Eddy current loss
•Both air friction and eddy current loss
•Slack loss and brush loss
Answer: air friction loss
45. What is the resistance between the primary and secondary of a transformer?
•Zero
•1 Ohm
•1000 Ohm
•Infinity
Answer: Infinite
46. For a 3-phase load balanced condition, which of the following has the same value in each phase?
•Impedance
•Resistance
•Power factor
•All options are correct
Answer: All options are correct
47. Determine the value of charge stored in a capacitor (in milli-coulombs) when the capacitance is 0.01 millifarad and the potential difference across the capacitor is 20 volts?
•0.2
•2
•20
•200
Answer: 0.2
48. Name the generating station where electrical energy is produced using steam.
•Thermal power station
•Diesel power station
•Hydro power station
•Nuclear power station
Answer: Thermal power station
49. Which of the following statements is correct?
•Electric current always flows in the direction of the flow of electrons
•Electric current always flows opposite the direction of the flow of electrons
•Electric current always flows from the negative terminal to the positive terminal
•Electrons always flow from the positive terminal to the negative terminal
Answer: Electric current always flows opposite to the direction of flow of electrons
50. What are three induction motors similar to?
•Transformer secondary short circuit
•Transformer secondary open circuit
•DC motor with load
•DC motor without load
Answer: Transformer secondary short circuit
51. Microwave oven operates at …………… frequency.
•1.37 GHz
•2.45GHz
•3.37GHz
•5.52GHz
Answer. 2.45GHz
52. In a DC series generator, the terminal voltage when the load increases
•will decrease
•will gradually increase and then remain at the set voltage
•will increase up to the set voltage and then may decrease
•will remain almost constant
Answer: It will increase up to the set voltage and then decrease
53. Ohm’s law applies to which of the following?
•Variable and constant temperature
•Constant temperature
•Variable temperature
•Any of the options
Answer: constant temperature
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