UPRVUNL JE Oct Nov 2021 Exam Paper with answer

Test Date: 21/10/2021
Test Time: 9:00 AM – 12:00 PM
Subject: Junior Engineer (Trainee) E & M (Electrical)

Question 01: Nuclear fuel used in nuclear reactor is:

1. U239
2. U238
3. U230
4. U235

Answer: U235

Question 02: In a common base transistor configuration, if IB = 0.25 mA and IE = 1.4 mA, then IC is:

1. –1.65 mA
2. –1.15 mA
3. 1.65 mA
4. 1.15 mA

Answer: 1.15mA

Question 03: An amplifier has a voltage gain 60 and β = 100. The power gain of the amplifier is:

1. 6000
2. 600
3. 1.66
4. 0.6

Answer: 6000

Question 04: Th condition of maximum efficiency of transformer:

1. core loss < copper loss
2. core loss = copper loss
3. core loss = twice the copper loss
4. core loss > copper loss

Answer: core loss = copper loss

Question 05: In an 8085 microprocessor, which of the following is the highest priority interrupt?

1. RST 5.5
2. RST 3.5
3. TRAP
4. RST 7.5

Answer: TRAP

Question 06: Which of the following is the modulating signal in SPWM?

1. Sinusoidal
2. Square
3. Triangular
4. Saw-tooth

Answer: Sinusoidal

Question 07: The protective angle for a single vertical conductor is:

1. 75°
2. 60°
3. 45°
4. 90°

Answer: 45°

Question 08: Which substance produces hydrophobic nature?

1. Silicone rubber
2. Ceramic
3. Glass
4. XLPE

Answer: Silicon Rubber

Question 09: The external interrupts of 8051 microcontroller are:

1. TRAP and INT1
2. INT0 and INT1
3. INT2 and INT1
4. TRAP and INTR

Answer: INT0 and INT1

Question 10: An economiser is a constituent of a __ power plant.

1. Diesel power plant
2. Hydro power plant
3. Steam power plant
4. Nuclear power plant

Answer: Steam power plant

Question 11: Three-phase transmission line is being supported by three disc insulators. The potentials
across top unit (i.e., near to the tower) and middle unit and bottom unit are 10 kV, 11 kV and
14 kV respectively. Calculate string efficiency.

1. 79.67%
2. 85%
3. 83.33%
4. 86.67%

Answer: 83.33%

Question 12: A digital multiplexer is an example of:

1. a very large-scale integration (VLSI) device
2. a medium-scale integration (MSI) device
3. a small-scale integration (SSI) device
4. a large-scale integration (LSI) device

Answer: A medium-scale integration (MSI) device

Question 13: Earthing keep the frame of the equipment at _ earth potential.

1. high
2. very high
3. zero
4. low

Answer: Zero

Question 14: Which power plant yields NO standby loss?

1. Steam power plant
2. Nuclear power plant
3. Hydro power plant
4. Diesel power plant

Answer: Hydro power plant

Question 15:

1. Directional impedance relay
2. Reactance relay
3. Impedance relay
4. Mho relay

Answer: Mho relay

Question 16: Calculate the no of poles of synchronous motor if the synchronous speed is 1200 rpm.
Given, supply frequency = 60 Hz.

1. 3
2. 5
3. 6
4. 2

Answer: 3.6

Question 17: A Single Phase 250 V induction watthour meter has a meter constant of 400 revolutions per
kWh. Determine the speed of the disc in rpm, for a current of 15 A at a unity power factor.

1. 400
2. 250
3. 25
4. 50

Answer: 25

Question 18: Induction type energy meter is coming under which of the following category?

1. Integrating instrument
2. Digital instrument
3. Indicating instrument
4. Recording instrument

Answer: Integrating instrument

Question 19: In an insulating material, VIR stands for:

1. Vulcanized India Rubber
2. Vulcanized Insulation Rod
3. Vulcanized Insulating Rubber
4. Vulcanized Insulation Rubber

Answer: Vulcanized India Rubber

Question 20: Which of the following causes permanent damage to a transmission line insulator?

1. Corona discharge
2. Puncture
3. Dry band arcing
4. Flashover

Answer: Puncture

Question 21: Current transformer (CT) has a rating of 100/5 A. Its magnetizing and loss components of
the exciting current are 6 A and 4 A respectively and its burden is purely resistive. The
transformation ratio of CT at rated current is:

1. 20
2. 24
3. 26
4. 20.8

Answer: 20.8

Question 22: Automatic meter reading can be done with:\

1. Automatic System for Mobile Communication
2. Global System for Mobile Communication
3. Automatic System for Mobile Network
4. Global System for Mobile Network

Answer: Global System for Mobile Communication

Question: 23: Resistors present in potentiometer are generally made of:

1. copper
2. gold
3. silver
4. manganin

Answer: Manganin

Question 24: Beyond which voltage level outdoor type switchgear is installed in a power system network?

1. 33 kV
2. 11 kV
3. 132 kV
4. 66 kV

Answer: 66 kv

Question 25: In a transmission line, find out CORRECT relation among ABCD parameters.

1. BD – AC = −1
2. AD – BC = −1
3. AB – CD = 1
4. BC – AD = −1

Answer: BC-AD=-1

Question 26: In what position should the earthing electrode always be placed?

1. Horizontal Position
2. Vertical Position
3. Horizontal or vertical position
4. Angle of 15° from the horizontal position

Answer: Vertical position

Question 27: HTTP’ is an acronym for:

1. Hypertext Transmit Protocol
2. Hypertext Transmit Platform
3. Hybridtext Transfer Protocol
4. Hypertext Transfer Protocol

Answer: Hypertext Transfer Protocol

Question 28: With respect to circuit breakers, which of the following statements is CORRECT?

1. A circuit breaker is an equipment which can open or close a circuit under no load, full
   load and fault conditions.
2. A circuit breaker is an equipment which can open or close a circuit under no load and
   full load conditions.
3. A circuit breaker is an equipment which can open or close a circuit under no load and
   fault conditions.
4. A circuit breaker is an equipment which can open or close a circuit under only fault
   conditions.

Answer: A circuit breaker is an equipment which can open or close a circuit under no load, full
load and fault conditions.

Question 29: Which of the following bridge is NOT used for measurement of inductance?

1. Owen’s Bridge
2. Anderson’s Bridge
3. De Sauty’s Bridge
4. Hay’s Bridge

Answer: De Sauty’s Bridge

Question 30:

Answer:

Question 31: Which of the following is the CORRECT full form of PLC?

1. Programmable Logic Converter
2. Programmable Logic Controller
3. Programmable Load Controller
4. Programmable Load Converter

Answer: Programmable Logic Controller

Question 32: Which of following relay is used for transformer protection?

1. Mho relay
2. Distance relay
3. Impedance relay
4. Buchholz relay

Answer: Buchholz relay

Question 33: In order to eliminate the 5th harmonic from the EMF wave of an alternator, what will be the
fractional pitch?

Answer:

Question 34: Which of the following is the Binary Coded Decimal (BCD) representation of decimal number
(25)10?

1. 01000101
2. 00110101
3. 00100101
4. 011001
5. 01

Answer: 00100101

Question 35: Which of the following is NOT a web browser?

1. Maxthon
2. Opera
3. Google Chrome
4. K7

Answer: K7

Question 36: Merz price protection is used for the protection of:

1. Both Transformer and Alternator
2. Transformer
3. Transmission lines
4. Alternator

Answer: Both Transformer and Alternator

Question 37: Which of the following emit greenish-blue colour?

1. Sodium vapour lamp
2. Neon tube
3. Mercury vapour lamp
4. Neon lamp

Answer: Mercury vapour lamp

Question 38: What is the keyboard shortcut to crop an image on GIMP (GNU Image Manipulation
Program) compatible platforms?

1. Alt + C
2. Shift + C
3. Ctrl + C
4. Shift + Alt + C

Answer: Shift + C

Question 39: The voltage is said to be an extra high where voltage exceeds __ volt.

1. 33000 volt
2. 3300 volt
3. 330 volt
4. 330000 volt

Answer: 33000 volt

Question 40:

A. 0.33 (Va – vb)
B. 4.2 (Va – vb)
C. -4.2 (Va – vb)
D. 3 (Va – vb)

Answer: 0.33 (Va – vb)

Question 41: If a building wiring consists of 10 points of 60 watt lamps and 2 fans of 100 watts each.
Determine the permissible insulation resistance to earth for a 240 V system of supply.

1. 0.36 MΩ
2. 0.12 MΩ
3. 0.42 MΩ
4. 0.18 MΩ

Answer: 0.36 MΩ

Question