Embed Size (px)
Citation preview
LAHORE ELECTRIC SUPPLY COMPANY
(LESCO)
JUNIOR ENGINEER ELECTRICAL & ELECTRONICS TEST 11-OCT-2020
PART 1: GENERAL KNOWLEDE + ISLAMIC STUDIES+IT
MCQ’S
Q1) Line of actual control is between?
A) China and India
B) China and Pakistan
C) Pakistan and India
D) China, Nepal and India
Ans) A
Q2) Which river originates from near Manasarovar Lake?
A) Indus River
B) Chenab River
C) Ravi River
D) Jhelum River
Ans) A
Q3) Who accepted Islam first in Children?
A) Hazrat Usman(R.A)
B) Hazrat Abu-Bakr siddiq(R.A)
C) Hazrat Umar(R.A)
D) Hazrat Ali(R.A)
Ans) D
Q4) In which Hijri Ghazwa e Khyber was fought?
A) 4 Hijri
B) 5 Hijri
C) 6 Hijri
D) 7 Hijri
Ans) D
Q5) 1956 constitution abolished in?
A) 6 October 1958
B) 7 October 1958
C) 8 October 1958
D) 9 October 1958
Ans) B
Q6) The ATM network is fully based on?
A) Distributed data base
B) Centralized data base
C) Both A&B
D) Structured data base
Ans) B
Q7) Which country foreign Minister will not attend 46 meeting of OIC?
A) Pakistan
B) Turkey
C) Iran
D) Saudi Arabia
Ans) A
Q8) Pakistan has a coastline of about __________ kilometers?
A) 1046
B) 1100
C) 700
D) 1184
Ans) A
Q9) What was the name of Hazrat Khadija (RA) father?
A) Hashim
B) Zubair ibn al-awam
C) Khuwaylid
D) Asad ibne abd-ul- Uzza
Ans) C
Q10) which country crossed us in oil import?
A) Russia
B) Canada
C) India
D) China
Ans)
Q11) Some mathematic equation whose answer 26.
Q12) The line which passes through the focus and perpendicular to the
major axis is ________
A) Minor axis
B) Latus rectum
C) Directrix
D) Tangent
Ans) B [https://www.sanfoundry.com/engineering-drawing-questions-answers-
construction-ellipse-1/]
Q13) PSL 4 was won by?
A) Quetta Gladiators
B) Islamabad United
C) Peshawar Zalmi
D) lahore qalandars
Ans) A
Q14) Silicon is more preferable due
A) Decrease in size
B) High melting point
C) Increase in size
D) Decrease in Scale of integration
Ans)
Q15) The who deliver the message of prophet (SAW) to king of Egypt
……….. .
Q16) In 1946 Muslim league meeting is led by (A. K. Fazlul Huq)
LAHORE ELECTRIC SUPPLY COMPANY
(LESCO)
JUNIOR ENGINEER ELECTRICAL & ELECTRONICS TEST 11-OCT-2020
PART 2: TECHNICAL PORTION MCQ’S
Q18) Which of the following is the unit of luminous intensity?
A) Lumens
B) Candela
C) Lux
D) Mho’s
Ans) A
Q19) In open circuit the current is
A) Infinite
B) Zero
C) Maximum
D) Both A&B
Ans) B
Q20) MOSFET can be used as
A) Current controlled Capacitor
B) Voltage controlled Capacitor
C) Voltage controlled Resistor
D) Voltage controlled Inductor
Ans) B
Q21) Ebers Moll model is applicable to
A) Bipolar Junction transistor
B) N MOS transistor
C) Unipolar junction transistor
D) Field effect transistor
Ans) A
Q22) A 50Km transmission line with 500Hz frequency is consider as
A) Short transmission line
B) Long transmission line
C) Medium transmission line
D) Extra high voltage
Ans) B
Q23) Which of the following cannot stored energy
A) Capacitor
B) Inductor
C) Resistor
D) Transformer
Ans) D
Q24) The advantage of PMMC instrument is
A) Free from friction errors
B) Low torque weight ratio
C) High torque weight ratio
D) Both A&B
Ans) C
Q25) Which of the following is not related to the BJT
A) PN Junction
B) Current controlled
C) Low input impedance
D) Channel
Ans) D
Q26) Resistance of wire can be decrease by increasing
A) Area of correction
B) Length
C) Voltage
D) Resistivity
Ans) A
Q27) The three phases in power system is
A) RYB
B) RBY
C) YBR
D) BRY
Ans) B
Q28) Capacitor does not allow sudden the change in
A) Voltage
B) Current
C) Both of these
D) Resistance
Ans) A
Q29) In P-type martial majority carriers are
A) Electrons
B) Holes
C) Both of these
D) None of the above
Ans) A
Q30) Rating of fuse wire is reported as
A) Amperes
B) Ohms
C) Mho
D) KV
Ans) A
Q31) The induced in conductor due to the rate of change of
A) Current
B) Voltage
C) Flux
D) None of the above
Ans) C
Q32) Impedance can be find by
A) Dividing voltage and current
B) Phase current divided by phase voltage
C) Dividing current and voltage
D) Phase voltages divided by phasor currents
Ans) D
Q33) The energy stored in inductor is directly proportional to
A) Voltage
B) Current
C) Both A&B
D) Resistance
Ans) B
Q34) Capacitor stored in charged in the form of
A) Electric field
B) Magnetic field
C) Both A&B
D) Emf
Ans) A
Q35) The capacitance of capacitor can be increased by
A) Increasing separation between plates
B) Increasing the area of plates
C) Increasing resistance in circuit
D) None of the above
Ans) B
Q36) The energy stored in capacitor is directly proportional to
A) Voltage
B) Current
C) Both A&B
D) Resistance
Ans) A
Q37) To improve the power factor we can connect
A) Capacitor is series with inductive load
B) Capacitor is parallel with inductive load
C) Inductor is series with inductive load
D) Both A&B
Ans) B
Q38) The Sum of all the voltage drop is DC circuit is equal to
A) Zero
B) Infinite
C) Negative
D) Current
Ans) A
Q39) DC Current always follow the
A) Highest resistance path
B) Lowest resistance path
C) Both A&B
D) Highest resistance
Ans) B
Q40) Bundled conductors are in transmission lines to
A) Reduce mechanical strength
B) Reduce the corona
C) Reduce the line inductance
D) Increase resistance
Ans) B
Q41) Zener diode is used as
A) Current regulator
B) Voltage regulator
C) Voltage divider
D) Current divider
Ans) B
Q42) Diode is used as
A) Non-linear
B) Linear
C) Passive
D) None of the above
Ans) A
Q43) Resistance can measure indirectly
A) Voltage
B) Current
C) Temperature
D) Pressure
Ans) C
Q44) In thermal power plant working fluid can generated by
A) Super heater
B) Condenser
C) Boiler
D) Turbine
Ans) A
Q45) Ideal current source can provide
A) Constant voltage
B) Constant current
C) Both A&B
D) Constant capacitance
Ans) B
Q46) If machine has 250 rpm speed of 50 Hz frequency pole will be
A) 21
B) 23
C) 24
D) 25
Ans)
Q47) Precision is closeness to (Precision refers to the closeness of two
or more measurements to each other)
Q48) Accuracy (Accuracy refers to the closeness of a measured value
to a standard or known value or true value)
Q49) The capacitance of PN Junction increase as the
A) Reverse biased is increase
B) Reversed biased is decrease
Ans) B
The junction capacitance is inversely proportional to the width of the
depletion region of PN Diode. With the increase in reverse voltage, the
width of the depletion region increases. Hence the capacitance, C
decreases. Similarly when reverse voltage decreases, the junction
capacitance increases.
Q50) By inserting iron core inside the coil the strength of magnetic
field
A) Increase
B) Decrease
C) Both A&B
D) Constant
Ans) A
Q51) To convert thvenin,s circuit to equivalent circuit Norton circuit
which of the following remains same
A) Current
B) Voltage
C) Power
D) Resistance
Ans) A [https://www.allaboutcircuits.com/textbook/direct-
current/chpt-10/thevenin-norton-equivalencies/]
Q52) Ideal transformer (ideal transformer has both sum of primary
and secondary importance)
Q53) Which of the following is not enable in smart grid.
Q54) SCADA does not include
A) Data
B) Control
C) Acquisition
D) Generatio
Ans) D
Q55) Free space (Act has insulator because it cannot have free
electrons)
Q56) Transmission line have
A) Phase to Phase voltage
B) Phase voltage
C) RMS Line to Line voltage
D) Line voltage
Ans) C
Q57) Temperature coefficient is positive in case of (Extrinsic
semiconductor)
Q58) Shunt reactors are used in Transmission [Shunt reactors increase
stability of line]
A) To increase short circuit current
B) To reduce power
C) To reduce corona
D) To Line voltage
Ans) A
Q59) For BJT in saturation region
A) Both junctions are forward biased
B) One junction is forward biased
C) None of the above
Ans) A
Q60) Kwh is unit of
A) Current
B) Electrical energy
C) Resistance
D) Voltage
Ans) C
Q61) Inductor oppose the change in
A) Current
B) Power
C) Resistance
D) Voltage
Ans) A
Q62) Capacitor oppose the change in
A) Current
B) Power
C) Resistance
D) Voltage
Ans) D
