Electrical Engineering MCQ with Answers

Question No.1. A d.c. shunt motor runs at no load speed of 1140 r.p.m. At full load, armature reaction
weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full load speed in r.p.m. is
(A) 1200
(B) 1203
(C) 1000
(D) 1080
Answer: (D) 1080
Question No.2 The voltage at the two ends of a transmission line are 132 KV and its reactance is
40 ohm. The Capacity of the line is
(A) 251.5 MW
(B) 217.8 MW
(C) 435.6 MW
(D) 500 MW
Answer: (C) 435.6 MW

Question No.3. The gravity controlled instrument has crowded scale because current is proportional to
(A) balancing weight
(B) deflection angle
(C) sine of deflection angle
(D) Location of CT
Ans: (C) sine of deflection angle


Question No.4. For LV applications (below 1 kV), ______________ cables are used.
(A) Paper insulated.
(B) Single core cables.
(C)Plastic.
(D) Oil filled.
Answer: B) Single core cables.

Question No.5. The eddy current loss in an a-c electric motor is 100 watts at 50 Hz. Its loss at 100
Hz will be
(A) 25 watts
(B) 400 watts
(C) 200 watts
D) 219 watts
Answer: (B) 400 watts

Question No.6. The rotor frequency for a 3 phase 1000 RPM 6 pole induction motor with a slip of
0.04 is________Hz
(A) 8
(B) 4
(C)5
(D) 2
Answer: (D) 2


Question No.7. In case of a universal motor, torque pulsation is minimized by _________.
(A) load inertia
(B) rotor inertia
(C) both rotor and load inertia
(D) none of the above
 Answer: (C) both rotor and load inertia

Question No.8. The pressure coil of a wattmeter should be connected on the supply side of the current coil
when
(A) supply voltage is low
(B) load impedance is low
(C) load impedance is high
(D) none of the above
Answer: (C) load impedance is high

Question No.9. The boundary of the protective zone is determined by the
(A) Location of CT
(B) sensitivity of relay used
(C) Location of PT
(D) None of these
Answer: (B) sensitivity of relay used


Question No.10. The two windings of a transformer is
(A) conductively linked.
(B) electrically linked.
(C) not linked at all.
(D) inductively linked.
 Answer :(D) inductively linked.

Electrical Engineering Questions with Answer

Question # 1. The drive motor used in a mixer-grinder is a
(A) universal motor.
(B) induction motor.
(C) synchronous motor.
(D) dc motor.
Ans: (A) universal motor.

Question # 2. The direction of rotation of hysteresis motor is reversed by
 (A) Reversing supply lead
 (B) Shift shaded pole with respect to main pole
 (C) Either A or B
 (D) Neither A nor B
Ans: (B) Shift shaded pole with respect to main pole

Question # 3. Alternating current is measured by
(A) induction ammeter
(B) permanent magnet type ammeter
(C) electrostatic ammeter
(D) moving iron repulsion type voltmeter
Ans: (A) induction ammeter


Question # 4. A 3-phase, 400 votts, 50 Hz, 100 KW, 4 pole squirrel cage induction motor with a rated slip of 2% will have a rotor speed of
(A) 1500 rpm
(B) 1570 rpm
(C) 1530 rpm
(D) 1470 rpm
Ans: (D) 1470 rpm

Question # 5. The torque, in a _____________is proportional to the square of the armature current
(A) DC series motor
(B) stepper motor
(C) 2-phase servomotor
(D) DC shunt motor
 Ans:(A) DC series motor

Question # 6. Inverse definite minimum time lag relay is also called ___________
(A) pilot relay.
(B) differential relay.
(C) over current relay.
(D) directional overcurrent relay.
 Ans:(B) differential relay.


Question # 7. The scale of a rectifier instrument is
(A) linear
(B) non-linear
(C) either (a) or (b)
(D) neither (a) nor (b)
Ans: (A) linear

Question # 8. The synchronous reactance of the synchronous machine is ______________.
 (A) Ratio between open circuit voltage and short circuit current at constant field current
 (B) Ratio between short circuit voltage and open circuit current at constant field current
 (C) Ratio between open circuit voltage and short circuit current at different field current
 (D) Ratio between short circuit voltage and open circuit current at different field current
 Ans.  (A) Ratio between open circuit voltage and short circuit current at constant field current

Question # 9. If an instrument has cramped scale for larger values, then it follows
(A) square law
(B) logarithmic law
(C) uniform law
(D) none of the above
Ans: (B) logarithmic law


Question # 10. In a three phase transformer, if the primary side is connected in star and secondary side is connected in delta, what is the angle difference between phase voltage in the two cases.
(A) delta side lags by -30°.
(B) star side lags by -30°.
(C) star side leads by -30°.
(D) delta side leads by 30°.
 Ans: (D) delta side leads by 30°. 

ELECTRICAL ENGINEERING QUESTION ANSWERS

1. Which of the following is not a vector ?
(a) Linear momentum
(b) Electric potential
(c) Electric field
(d) Angular momentum

Answer: (d) Angular momentum

2. The efficiency of a machine should be as ______ as possible to reduce the operating
cost.
(a) high
(b) low
(c) either of the above
(d) none of the above


Answer:(a) high

3. The force between two charges is 120 N. If the distance between the charges is doubled,
the force will be
(a) 60 N
(b) 40 N

ELECTRICAL ENGINEERING QUESTION ANSWERS

Question# 1. A sensitive galvanometer produces large deflection for a
(a) large value of power
(b) large value of current
(c) small value of current
(d) large value of voitage
(e) none of the above
Answer: (c) small value of current

Question# 2. Mass, in force-voltage analogy, is analogous to
(a) charge
(b) current
(c) resistance
(d) inductance
Answer: (d) inductance

Question# 3. To measure radio frequency, the suitable frequency meter is
(a) hetrodyne frequency meter
(b) reed vibrator frequency meter
(c) Weston frequency meter
(d) electrical resonance frequency meter
Answer: (a) hetrodyne frequency meter


Question# 4. Which of the following can be measured by the use of a tacho-generator ?
(a) Acceleration
(b) Speed
(c) Speed and acceleration
(d) Displacement

Answer: (b) Speed

Question# 5. The power of a n-phase circuit can be measured by using a minimum of
(a) (n - 1) wattmeter elements
(b) n wattmeter elements
(c) (n + 1) wattmeter elements
(d) 2n wattmeter elements
Answer: (a) (n - 1) wattmeter elements

Question# 6. Velocity error constant of a system is measured when the input to the system is unit
_______ function.
(a) parabolic
(b) impulse

(c) ramp
(d) step
Answer: (c) ramp

Question# 7. A control system with excessive noise, is likely to suffer from
(a) oscillations
(b) loss of gain
(c) vibrations
(d) saturation in amplifying stages
Answer: (d) saturation in amplifying stages

Question# 8. Commonly used instruments in power system measurement are
(a) moving coil or iron
(b) induction
(c) rectifier
(d) electrostatic
Answer: (b) induction

Question# 9. Volt box is a component to
(a) compare voltage in a box
(6) measure voltage
(c) extend voltage range
(d) none of the above
Answer: (c) extend voltage range


Question# 10. is a closed loop system.
(a) Electric switch
(6) Direct current generator
(c) Car starter
(d) Auto-pilot for an aircraft
Answer: (d) Auto-pilot for an aircraft

ELECTRICAL ENGINEERING EXAM QUESTIONS JULY 2017

Question # 1. In open loop system
(a) the control action is independent of the output
(b) the control action depends on system variables
(c) the control action depends on the input signal
(d) the control action depends on the size of the system
Answer: (a) the control action is independent of the output


Question # 2. Standard resistor is made from
(a) platinum
(b) maganin
(c) silver
(d) nichrome
Answer:  (b) maganin

Question # 3. Which of the following is the output of a thermocouple ?
(a) Alternating current
(b)  D.C. voltage
(c) A.C. voltage

(d) Direct current
Answer:  (b)  D.C. voltage

Question # 4. In a Weston frequency meter, the magnetic axes of the two fixed coils are
(a) parallel
(b)  inclined at 60°
(c) perpendicular
(d) inclined at 120°
Answer: (c) perpendicular

Question # 5. can be extended to systems which are time-varying ?
(a) Bode-Nyquist stability methods
(b) Transfer functions
(c) Root locus design
(d) State model representatives

Answer: (d) State model representatives

Question # 6. If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is
(a) 10°
(b) 85°
(c) 120°
(d) 160°

Answer: (a) 10°

Question # 7. A conditionally stable system exhibits poor stability at
(a) low frequencies
(b) increased values of open loop gain
(c) reduced values of open loop gain
(d) none of the above
Answer: (c) reduced values of open loop gain

Question # 8. Basically a potentiometer is a device for
(a) comparing two voltages
(b) measuring a current
(c) comparing two currents
(d) measuring a voltage

Answer: (a) comparing two voltages

Question # 9. is the reference input minus the primary feedback.
(a) Manipulated variable
(b) Actuating signal
(c) Zero sequence
(d) Primary feedback
Answer:
(b) Actuating signal

Question # 10. Resistances can be measured with the help of
(a) ohmmeters and resistance bridges
(b) voltmeters
(c) ammeters
(d)wattmeters

Answer: (a) ohmmeters and resistance bridges

ELECTRONICS ENGINEERS RECRUITMENT EXAM QUESTIONS WITH ANSWER

Question1:-The main advantage of CMOS is its
 A:-Low power consumption
 B:-High power rating
 C:-Small signal operation
 D:-Fast switching capability
 Correct Answer:- Option-A
Question2:-A lamp is controlled from two positions A and B (eg : staircase circuit). The boolean expression for the above
circuit is
 A:-
 B:-
 C:-
 D:-
 Correct Answer:- Option-B
Question3:-Which one of the following is not written by Ponkunnam Varkey ?
 A:-Vikarasadanam
 B:-Nivedanam
 C:-Aniyara
 D:-Kudumbini
 Correct Answer:- Option-D
Question4:-The main constituents of a Portland Cement is
 A:-lime
 B:-Alumina
 C:-Iron Oxide
 D:-Alkalies
 Correct Answer:- Option-A
Question5:-Vagbhadanandha was the main disciple of
 A:-Sree Narayanaguru
 B:-Chattampi Swamikal
 C:-Brahmananda Sivayogi
 D:-V. T Bhattathiripad
 Correct Answer:- Option-C
Question6:-Monetary Museum of Reserve Bank of India is situated at
 A:-Kolkata
 B:-Mumbai
 C:-Bengaluru
 D:-Delhi
 Correct Answer:- Option-B
Question7:-Recently Thousand history buffs gathered in Czech Republic to re-enact the Battle of Austerlitz. Name the ruler
related with this Battle.
 A:-Napoleon
 B:-Henry V

ARCHITECTURAL DRAFTSMAN EXAM QUESTION ANSWERS

PROVISIONAL ANSWER KEY
Question Paper Code: 48/2017/OL
Category Code: 065/2016
Exam: Draftsman (Architectural) Gr.I
Medium of Question: English
Date of Test 19-06-2017
Department PWD Architectural Wing
Alphacode A
Question1:-Which day is observed as National Voters Day ?
 A:-September 14
 B:-November 16
 C:-January 25
 D:-March 20
 Correct Answer:- Option-C
Question2:-Which year was the `5^(th)` and last visit of Gandhiji in Kerala ?
 A:-1937
 B:-1929
 C:-1935
 D:-1939
 Correct Answer:- Option-A
Question3:-Which Chinese traveller who visited Kerala in A.D. 1409 ?
 A:-Xuan Zang
 B:-Mahuvan
 C:-Al-Masudi
 D:-Fa-Hien
 Correct Answer:- Option-B
Question4:-Who wrote the book "Keralthinte Desa Namangal" ?
 A:-S. K. Pottakkad
 B:-K. Jayakumar
 C:-Praveen Chandran
 D:-Chattambi Swami
 Correct Answer:- Option-D
Question5:-Who established the Chala Bazar in Thiruvananthapuram ?
 A:-Raja Kesavadas
 B:-Marthanda Varma
 C:-Dharma Raja
 D:-C. P. Ramaswami Iyyer
 Correct Answer:- Option-A
Question6:-Who was the publisher of the Journal "Deepika" ?
 A:-Vakkam Abdul Khadir Maulavi
 B:-St. Chavara Kuriakose Elias
 C:-Arnos Paathiri
 D:-Kattakayam Cherian Mappillai
 Correct Answer:- Option-A
Question7:-Who is known as "Father of the library movement in Kerala" ?
 A:-Jamnalal Balaji
 B:-Puthuvayil Narayana Panicker
 C:-Dhondo Keshav Karve
 D:-S. K. Pottakad
 Correct Answer:- Option-B
Question8:-World Alzheimers day observed on
 A:-September 16
 B:-October 11
 C:-September 21
 D:-October 19
 Correct Answer:- Option-C
Question9:-Who is the director of the Malayalam film "Neythukkaran" ?
 A:-Syamaprasad
 B:-Shaji. N. Karun
 C:-Priyanandan
 D:-Adoor Gopalakrishnan
 Correct Answer:- Option-C
Question10:-Who was the head of the fiscal responsibility and budget management committee ?
 A:-Rathin Roy
 B:-N. K. Singh
 C:-Sumit Bose
 D:-Arvind Subramanian
 Correct Answer:- Option-B
Question11:-Who started "Adilahala" a revolt against the upper caste society ?
 A:-Pandit Karuppan
 B:-Sahodaran Ayyappan
 C:-Ayyankali
 D:-Poikayil yohannan
 Correct Answer:- Option-D
Question12:-Who is known as the campaigner of Swadesi movement ?
 A:-A. V. Kuttimalu Amma
 B:-Lalitha Prabhu
 C:-Parvathi Nenmeni Mangalam
 D:-Arya Pallam
 Correct Answer:- Option-A
Question13:-Who was the founder and editor of the journal "Shreemati" ?
 A:-A. V. Kuttimalu Amma
 B:-Ammu Swaminathan
 C:-Accamma Cherian
 D:-Anna Chandy
 Correct Answer:- Option-D
Question14:-Who is known as "Sarasa Kavi" ?
 A:-Pandalam Kerala Varma
 B:-P. Keshav Dev
 C:-Mooloor S. Padmanabha Panicker
 D:-V. T. Bhattathiripad
 Correct Answer:- Option-C
Question15:-The highest literary honour instituted by Kerala government is known as
 A:-Jnanapith Award
 B:-Valayalar Award
 C:-Odakkulal Award
 D:-Ezhuthachan Award
 Correct Answer:- Option-D
Question16:-Which list included "adoption" ?
 A:-Union list
 B:-State list
 C:-Concurrent list
 D:-None of these
 Correct Answer:- Option-C
Question17:-The latest Indian constitutional amendment related to
 A:-Money transfer
 B:-GST Bill
 C:-Currency withdrawal
 D:-Income tax
 Correct Answer:- Option-B
Question18:-Who is the founder of the Malayalam journal "Vivekodayam" ?
 A:-Vagbhadananda
 B:-C. V. Kunjuraman
 C:-Ayyankkali
 D:-Kumaranasan
 Correct Answer:- Option-D
Question19:-How many official languages of U.N.O. ?
 A:-6
 B:-7
 C:-5
 D:-4
 Correct Answer:- Option-A
Question20:-Which is the "Study of mosses" dealt with ?
 A:-Bromatology
 B:-Bryology
 C:-Bionomics
 D:-Batology
 Correct Answer:- Option-B
Question21:-If a force acts on a body, it sets up some resistance to the deformation. This resistance is known as
 A:-Stress
 B:-Strain
 C:-Elasticity
 D:-Modulus of elasticity
 Correct Answer:- Option-A
Question22:-The term deformation per unit length is applied for
 A:-Stress
 B:-Strain
 C:-Modulus of elasticity
 D:-None of these
 Correct Answer:- Option-B
Question23:-Modulus of elasticity is the ratio of
 A:-Stress to original length
 B:-Deformation to original length
 C:-Stress to strain
 D:-All of these
 Correct Answer:- Option-C
Question24:-The ratio of lateral strain to the linear strain is called
 A:-Modulus of elasticity
 B:-Modulus of rigidity
 C:-Bulk modulus
 D:-Poissons ratio
 Correct Answer:- Option-D
Question25:-The value of Poisson's ratio for steel varies from
 A:-0.20 to 0.25
 B:-0.25 to 0.35
 C:-0.35 to 0.40
 D:-0.40 to 0.50
 Correct Answer:- Option-B
Question26:-The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part
of their resultant in the same direction. This is known as
 A:-Principle of independence of forces
 B:-Principle of resolution of forces
 C:-Principle of transmissibility of forces
 D:-None of these
 Correct Answer:- Option-B
Question27:-The resultant of two forces P and Q acting at an angle θ is
 A:-`sqrt(P^(2)+Q^(2)+2PQsintheta)`
 B:-`sqrt(P^(2)+Q^(2)+2PQcostheta)`
 C:-`sqrt(P^(2)+Q^(2)-2PQcostheta)`
 D:-`sqrt(P^(2)+Q^(2)-2PQtantheta)`
 Correct Answer:- Option-B
Question28:-In order to determine two effects of forces acting on a body, we must know
 A:-Its magnitude and direction of the line along which its acts
 B:-Weather push or pull
 C:-Point through which it acts on the body
 D:-All of the above
 Correct Answer:- Option-D
Question29:-In a compound lever, the leverages of all the simple levers is
 A:-Added
 B:-Subtracted
 C:-Multiplied
 D:-Divided
 Correct Answer:- Option-C
Question30:-The force of friction between two bodies, one lying above the other, depends upon the roughness of the
 A:-area of their contact
 B:-relative velocity between them
 C:-is always normal to the surface of their contact
 D:-all of the above
 Correct Answer:- Option-C
Question31:-According to Lami's theorem, the three forces
 A:-must be equal
 B:-must be at 120° to each other
 C:-must be both of above
 D:-may not be any of the two
 Correct Answer:- Option-D
Question32:-The centre of gravity of hemisphere lies at a distance of _____ from its base.
 A:-`(3r)/8`
 B:-`(3)/(8r)`
 C:-`(8r)/3`
 D:-`8/(3r)`
 Correct Answer:- Option-A
Question33:-The bending moment at the free end of a cantilever beam carrying any type of load is
 A:-Zero
 B:-Minimum
 C:-Maximum
 D:-Equal to the load
 Correct Answer:- Option-C
Question34:-An inverted T section is subjected to shear force F. The maximum shear stress will occur at
 A:-Top of the section
 B:-Neutral axis of the section
 C:-Junction of web and flange
 D:-None of these
 Correct Answer:- Option-B
Question35:-When a solid shaft is subjected to torsion, the shear stress induced in the shaft at its centre is
 A:-Zero
 B:-Minimum
 C:-Maximum
 D:-Average
 Correct Answer:- Option-A
Question36:-The relation between Youngs modulus (E) Shear modulus (C) and Bulk modulus (K) is given by
 A:-`E = (3KC)/(3K + C)`
 B:-`E = (6KC)/(3K + C)`
 C:-`E = (9KC)/(3K + C)`
 D:-`E = (12KC)/(3K + C)`
 Correct Answer:- Option-C
Question37:-A localised compressive stress at the area of contact between two members is known as
 A:-tensile stress
 B:-crushing stress
 C:-bending stress
 D:-shear stress
 Correct Answer:- Option-B
Question38:-The total strain energy stored in a body is termed as
 A:-Resilience
 B:-Proof of resilience
 C:-Impact energy
 D:-Modulus of resilience
 Correct Answer:- Option-A
Question39:-The stress induced in a body, when suddenly loaded is _________ the stress induced when the same load is
applied gradually.
 A:-equal to
 B:-one half
 C:-twice
 D:-four times
 Correct Answer:- Option-C
Question40:-A beam which is fixed at one end and free at the other is called
 A:-Simply supported beam
 B:-Fixed beam
 C:-Overhanging beam
 D:-Cantilever beam
 Correct Answer:- Option-D
Question41:-The bending moment on a section is maximum where shear force is
 A:-Minimum
 B:-Maximum
 C:-Changing sign
 D:-One
 Correct Answer:- Option-C
Question42:-When a load on the free end of a cantilever beam is increased failure will occur
 A:-At the fixed end
 B:-At the free end
 C:-In the middle of the beam
 D:-At a distance `(2l)/3` from free end
 Correct Answer:- Option-A
Question43:-The bending moment diagram for a simply supported beam loaded in its centre is
 A:-a right angle triangle
 B:-an isoscles triangle
 C:-an equilateral triangle
 D:-a rectangle
 Correct Answer:- Option-B
Question44:-A section of beam is said to be in pure bending, if it is subjected to
 A:-Constant bending moment and constant shear force
 B:-Constant shear force and zero bending moment
 C:-Constant bending moment and zero shear force
 D:-None of the above
 Correct Answer:- Option-C
Question45:-The section modulus of a circular section about an axis through it centre of gravity is
 A:-`(Pid^(2))/4`
 B:-`(Pid^(2))/16`
 C:-`(Pid^(3))/16`
 D:-`(Pid^(3))/32`
 Correct Answer:- Option-D
Question46:-The maximum deflection of a cantilever beam of length 'l' with a point load W at the free end is
 A:-`(WL^(3))/(3EI)`
 B:-`(WL^(3))/(8EI)`
 C:-`(Wl^(3))/(16EI)`
 D:-`(Wl^(3))/(48EI)`
 Correct Answer:- Option-A
Question47:-The load required to produce a unit deflection in a spring is called
 A:-Flexural rigidity
 B:-Torsional rigidity
 C:-Spring stiffness
 D:-Young's modulus
 Correct Answer:- Option-C
Question48:-The hoop stress in a thin cylindrical shell is
 A:-Longitudinal stress
 B:-Compressive stress
 C:-Radial stress
 D:-Circumferential stress
 Correct Answer:- Option-D
Question49:-According to Euler's column theory, the crippling load for a column of length (L) with one end fixed and the
other end hinged is
 A:-`(Pi^(2)EI)/L^(2)`
 B:-`(Pi^(2)EI)/(4L^(2)`
 C:-`(2Pi^(2)EI)/L^(2)`
 D:-`(4Pi^(2)EI)/L^(2)`
 Correct Answer:- Option-C

Question50:-Factor of safety is defined as the ratio of
 A:-Ultimate stress to working stress
 B:-Working stress to ultimate stress
 C:-Breaking stress to ultimate stress
 D:-Ultimate stress to breaking stress
 Correct Answer:- Option-A

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