LAHORE ELECTRIC SUPPLY COMPANY
Transcript of LAHORE ELECTRIC SUPPLY COMPANY
LAHORE ELECTRIC SUPPLY COMPANY
(LESCO) TEST FOR KARACHI CANDIDATES
JUNIOR ENGINEER ELECTRICAL & ELECTRONICS TEST 25-OCT-2020
PART 1: GENERAL KNOWLEDE + ISLAMIC STUDIES+IT
MCQ’S
Q1) The minimum numbers of rows and columns in MS Ward is
A) 1 and 1
B) 2 and 1
C) 1 and 2
D) 2 and 2
Ans) A
Q2) which new department has been established for locust control
(Ans)
Q3) Indus water treaty was signed in (1960)
Q4) When M.A.O. College was established in Aligarh
A) 1877
B) 1875
C) 1873
D) 1872
Ans) A
Q5) Basis of Islam is
A) Quran and Sunnah
B) Quran, Hadith and Sunnah
C) Hadith
D) Sunnah
Ans) A
Q6) In star topology all the computers are connected controller is
called
A) Server
B) Telephone
C) Hub
D) Modem
Ans) B
Q7) Which of the following does not affect the speed of computer
(Mouse)
Q8) A line formed by the two regions ( Line segment)
Q9) Allah says is for me and I shall reward for it, this is for
A) Namaz
B) Fast
C) Jihad
D) All of the above
Ans) B
Q10) kharan desert is in
A) Punjab
B) Sindh
C) Baluchistan
D) North Punjab
Ans) C
Q11) The Budget session 2019-2020 was chaired by(Asad Qaiser)
Q12) Hazrat Bibi Ayesha (R.A) is daughter of
A) Hazrat Usman(R.A)
B) Hazrat Abu-Bakr siddiq (R.A)
C) Hazrat Umar(R.A)
D) Hazrat Ali(R.A)
Ans) B
Allah Says “Fasting is for me and I shall
reward for it”
Q13) Mohammad dam was inaugurated by (PM Imran Khan)
Q14) A function in x, y variables withs limits was given, the area of
curve was found (Definite Integral)
LAHORE ELECTRIC SUPPLY COMPANY
(LESCO) TEST FOR KARACHI CANDIDATES
JUNIOR ENGINEER ELECTRICAL & ELECTRONICS TEST 25-OCT-2020
PART: 2 TECHNICAL PORTION
Q15) In a hydro-electric plant, spillways are used.......?
A) To discharge all surplus water
B) To discharge surplus water on the downstream side of dam
C) Water is not not available in sufficient quantity
D) None of the above
Ans) B
Q16) Digital circuits consist of …………. Characteristics states?
A) One state
B) Two states
C) Three states
D) Four States
Ans) B
Q17) Semi-conductors have ………. Bond?
A) Covalent bond
B) Ionic bond
C) Both A & B
D) Hydrogen bond
Ans) A
Q18) There is capacitor in feed-back path of OP-Amp, then it called
as?
A) Summing amplifier
B) OP-Amp Differentiator
C) OP-Amp Integrator
D) Field effect transistor
Ans) C
Q19) The voltage that appears across the contacts at the instant of arc
in a circuit breaker is known as?
A) Arcing time
B) Recovery voltage
C) Re-striking voltage
D) Peak voltage
Ans) C
Q20) When the length of Arc increase in circuit breaker the resistance
will?
A) Increase
B) Decrease
C) Remain same
D) None of the above
Ans) A
Q21) Electrical conductors are metals mainly because metals possess
electrons in the outermost orbit where they are most loosely held and
can move around easily it conducts due to ………..?
A) Free Ions
B) Free electrons
C) Minority Carriers
D) High inductance
Ans) B
Q22) Triangular wave with 4 units mas has the average of
A) 4/radical 3
B) 4× radical 3
C) 4/radical 3
D)
Ans)
Q23) Isolator is a switch that is operated under ……… condition?
A) No load
B) Full load
C) Both A & B
D) None of the above
Ans) A
Q24) If MVA is doubled KV is halved the, Pu impedance is?
A) 2 times
B) 6 times
C) 8 times
D) 4 times
Ans) C
Q25) 60 Hz, motor can have maximum speed of?
A) 3000 rpm
B) 1500 rpm
C) 3600 rpm
D) 200 rpm
Ans) A
Q26) PN junction diode behave as?
A) Constant resistance
B) Variable resistance
C) Constant current source
D) Constant voltage source
Ans) C
Q27) Piezoelectric effect is positive in case of?
Ans)
𝒁𝑷𝒖 = 𝒁Ω × (𝑴𝑽𝑨)𝑩𝒂𝒔𝒆
(𝑲𝑽𝑨𝑩𝑨𝑺𝑬)𝟐
𝒁𝑷𝒖 = 𝒁Ω × (𝟐)𝑩𝒂𝒔𝒆
(𝟏/𝟐)𝟐
Q28) Super capacitor store energy in ……….. Field?
A) Electric
B) Magnetic
C) Electrostatic
D) None of the above
Ans) A
Q29) Electric field intensity is the?
A) Curl of potential
B) Gradient of potential
C) Both A & B
D) Sum of potential
Ans) B
Q30) The energy stored in inductor is directly proportional to?
A) Voltage
B) Current
C) Both A&B
D) Resistance
Ans) B
Q31) In RLC circuit at resonance (𝑿𝑳 = 𝑿𝑪)
Q32) Synchronous motor is?
A) Self-starting
B) Non self-starting
C) Both self and non-self-starting
D) None of the above
Ans) B
Q33) Ideal voltage source has?
A) Constant voltage and variable current
B) Constant current and variable voltage
C) Constant voltage and constant current
D) None of the above
Ans) A
Q34) The current sensitive instruments are?
A) PMMC
B) Hot wire instruments
C) Electrostatic instruments
D) Both A&B
Ans) D
Q35) Gauss’s law the net flux of an electric field in a closed surface is
directly proportional to the enclosed electric charge:
A) Ohm’s law
B) Ampere’s law
C) Gauss’s law
D) Stoke’s law
Ans) C
Q36) What is a load factor?
A) The ratio of average to maximum
demand.
B) The ratio of maximum demand to
average load
C) The product of maximum demand and average load.
D) The ratio of average load to the plant capacity.
Ans) A
Q37) Which of the following is an impulse turbine?
A) Pelton wheel
B) Kaplan turbine
C) Both A & B
D) None of the above
Gauss’s law states that the net flux of an electric
field in a closed surface is directly proportional to
the enclosed electric charge.
[Numerical question is asked
in paper values of average
and maximum demand is
given]
Ans) A
Q38) Solar cell produce which type of energy
A) AC
B) DC
C) Both A & B
D) None of the above
Ans) B
Q39) Which of the following does not stores energy in chemical
energy (Solar energy)
Q40) Which Chinese electric company has proposed 4th time to buy
66.40% shares of k electric
A) China Electric Company
B) North China Electric Company
C) China Electrical and Power Company
D) Shanghai Electric Power Company
Limited
Ans) D
Q41) Voltage and power of circuit is given [Question asked to find
resistance]
Q45) Ideal current source can provide
A) Constant voltage
B) Constant current
C) Both A&B
Fresh public announcement of
intention for acquisition
(directly or indirectly) of up to
66.40% of the voting shares of
K-Electric Limited by Shanghai
Electric Power Company
Limited, subject to receipt of
requisite regulatory and other
approvals.
D) Constant capacitance
Ans) B
Q47) Series RLC Circuit relation is for [Band pass Filter]