Electrical Engineering Question Answers Jan 2019

Question No. 1. Which of the following is measured by using a vector voltmeter ?
(a) Amplifier gain and phase shift
(b) Filler transfer functions
(c) Complex insersion loss
(d) All of the above
Ans: d
Question No. 2. When a synchronous motor is running at synchronous speed, the damper winding
(A) damping torque.
 (B) eddy current torque.
(C) torque aiding the developed torque.
 (D) no torque.
 Ans: D

Question No. 3. In a Schering bridge the potential of the detector above earth potential is
(a) a few volts only
(6) 1 kV
(c) 5 kV

(d) 10 kV
Ans: a

Question No. 4.In order to reduce the harmful effects of harmonics on the A.C. side of a high voltage
D.C. transmission system ______are provided.
 (A) synchronous condensers (B) shunt capacitors
(C) shunt filters (D) static compensators
 Ans: C

Question No. 5. A sensitive galvanometer produces large deflection for a
(a) small value of current
(b) large value of current
(c) large value of power
(d) large value of voitage
(e) none of the above
Ans: a

Question No. 6.Electric ovens using heating elements of _______________ can produce temperature
upto 3000°C.
 (A) Nickel (B) Graphite
 (C) Chromium (D) Iron
Ans: C

Question No. 7. If an inductance is connected in one arm of bridge and resistances in the remaining three
(a) the bridge can always be balanced
(b) the bridge cannot be balanced
(c) the bridge can be balanced if the resistances have some specific values
Ans: b

Question No. 8. The operating voltage of a meggar is about
(a) 6 V
(b) 12 V
(c) 40 V
(d) 100 V
Ans: d

Question No. 9. At present level of technology, which of the following method of generating electric
power from sea is most advantageous?
 (A) Tidal power. (B) Ocean thermal energy conversion
 (C) Ocean currents. (D) Wave power.
Ans: A

Question No. 10. The synchronous speed for a 3 phase 6-pole induction motor is 1200 rpm. If the
number of poles is now reduced to 4 with the frequency remaining constant, the rotor
speed with a slip of 5% will be _________.
 (A) 1690 rpm (B) 1750 rpm
 (C) 1500 rpm (D) 1710 rpm
 Ans: D

Electrical Engineering Question Answers- Nov 2018

Question No. 1. The power factor of a squirrel cage induction motor is
(A) low at light load only.
(B) low at heavy load only.
(C) low at light and heavy load both.
(D) low at rated load only.
 Ans: A

Question No. 2. Systematic errors are
(a) instrumental errors
(b) environmental errors
(c) observational errors
(d) all of the above
Ans: d

Question No. 3. Which of the following statements is correct for any closed loop system ?
(a) All the co-efficients can have zero value
(6) All the co-efficients are always non-zero
(c) Only one of the static error co-efficients has a finite non-zero value
(d) None of the above
Ans: c

Question No. 4 The temperature of resistance furnaces can be controlled by changing the:
 (A) applied voltage (B) number of heating elements
 (C) circuit configuration (D) All of the above
 Ans: D

Question No. 5. A Weston synchronoscope is a
(a) moving coil instrument
(b) moving iron instrument
(c) dynamometer instrument
(d) none of the above
Ans: c

Question No. 6. Reduction in the capacitance of a capacitor-start motor, results in reduced
 (A) Noise. (B) Speed.
 (C) Starting torque. (D) Armature reaction.
Ans: C

Question No. 7. To avoid the effect of stray magnetic field in A.C. bridges we can use
(a) magnetic screening
(b) Wagner earthing device
(c) wave filters
(d) any of the above
Ans: a

Question No. 8. The efficiency of a transformer is mainly dependent on
 (A) core losses. (B) copper losses.
 (C) stray losses. (D) dielectric losses.
Ans: A

Question No. 9. Velocity error constant of a system is measured when the input to the system is unit
_______ function.
(a) parabolic
(b) ramp
(c) impulse
(d) step
Ans: b

Question No. 10. Which of the following devices should be used for accurate measurement of low D.C.
voltage ?
(a) Small range moving coil voltmeter
(b) D.C. potentiometer
(c) Small range thermocouple voltmeter
(d) None of the above
Ans: b

Civil Engineers Recruitment Questions

Question # 1. Euler’s formula holds good only for
(1) Short columns
(2) Long columns
(3) Both short and long columns
(4) Intermediate columns

Question # 2. The vehicle used in case of enamel paints is usually
(1) Linseed oil
(2) Water
(3) Varnish
(4) None of the above

Question # 3. Closed contours of decreasing values
towards their centre, represent a
(1) Hill
(2) Depression
(3) Saddle
(4) River bed

Question # 4. Maximum bulking of sand is likely to occur at a moisture content of
(1) 5%
(2) 8%
(3) 11%
(4) 14%

Question # 5. The operation of revolving a plane table about its vertical axis so that all lines on
the sheet become parallel to corresponding lines on the ground is known as
(1) Levelling
(2) Centering
(3) Orientation
(4) Setting

Question # 6. Which of the following aggregates gives maximum strength in concrete ?
(1) Rounded aggregate
(2) Elongated aggregate
(3) Flaky aggregate
(4) Cubical aggregate

Question # 7. Plasticizers and superplasticizers are used to
(1) Reduce C/W ratio
(2) Increase workability
(3) Increase strength
(4) All of the above

Question # 8. As per IRC (Indian Road Congress), the maximum possible width of a vehicle will be
(1) 2·44 m
(2) 3·44 m
(3) 1·88 m
(4) 4·0 m

Question # 9. The value of the property shown in the account books after allowing necessary depreciation is called as
(1) Scrap value
(2) Salvage value
(3) Book value
(4) Market value

Question # 10. Which of the following is common, when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe ?
(1) Expansion
(2) Contraction
(3) Water hammer
(4) Turbulent flow

Question # 11. Coning of wheels is provided (1) To check lateral movement of
(2) To avoid damage to inner faces of rails
(3) To avoid discomfort to passengers
(4) All of the above

Question # 12. The initial setting time for ordinary portland cement as per IS specification
should not be less than
(1) 10 minutes
(2) 30 minutes
(3) 60 minutes
(4) 600 minutes

Question # 13. The IS code used for the design of RC elements is
(1) IS 875
(2) IS 800
(3) IS 456
(4) IS 8112

Question # 14. The slope of voids ratio versus log of effective stress for a soil specimen gives
(1) Coefficient of compressibility
(2) Coefficient of volume change
(3) Coefficient of consolidation
(4) Compression index

Question # 15. Water supply to a house begins with connection of the service pipe with municipal water mains. The connection sequence comprises
A. Stopcock
B. Gooseneck
C. Ferrule
D. Water meter

Electrical and Electronics Engineers Recruitment Exam Question Paper

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1. A 311 IC is an example of an eight-pin DIP that can be made to function as a ________.
A) comparator
B) 555 timer
C) D to A converter *
D) ladder network

2. A basic ________ amplifier is formed by three op-amps and seven resistors
A) instrumentation
B) isolation
C) log *
D) Antilog

Answer:C) log 

3.An antilog amplifier has a ________ in series with the input.
B) diode
C) diode or BJT
D) resistor*

Answer:D) resistor

Electrical Engineering Question Answers

Question #1. If the gain of the critical damped system is increased it will behave as
(a) oscillatory
(b) critically damped
(c) overdamped
(d) underdamped
(e) none of the above
Answer: (d) underdamped
Question #2. technique gives quick transient and stability response
(a) Root locus
(b) Bode
(c) Nyquist
(d) Nichols
Answer: (a) Root locus

Question #3. On which of the following factors does the sensitivity of a closed loop system to gain
changes and load disturbances depend ?
(a) Frequency
(b) Loop gain
(c) Forward gain
(d) All of the above
Answer: (d) All of the above

Question #4. Phase margin of a system is used to specify which of the following ?
(a) Relative stability
(b) Absolute stability
(c) Frequency response
(d) Time response
Answer: (a) Relative stability

Question #5. An increase in gain, in most systems, leads to
(a) constant damping ratio
(b) larger damping ratio
(c) smaller damping ratio
(d) none of the above
Answer: (c) smaller damping ratio

Question #6. As a result of introduction of negative feedback which of the following will not
decrease ?
(a) Instability
(b) Overall gain
(c) Distortion
(d) Band width
Answer: (d) Band width

Question #7. In a system zero initial condition means that
(a) The system is at rest and no energy is stored in any of its components
(b) The system is working with zero stored energy
(c) The system is working with zero reference signal
(d) The system is working with no signal
Answer: (a) The system is at rest and no energy is stored in any of its components

Question #8. The transient response of a system is mainly due to
(a) stored energy
(b) internal forces
(c) inertia forces
(d) friction
Answer: (a) stored energy

Question #9. The viscous friction co-efficient, in force-voltage analogy, is analogous to
(a) charge
(b) reciprocal of conductance
(c) reciprocal of inductance
(d) resistance

Answer:  (d) resistance

Question #10. In a stable control system backlash can cause which of the following ?
(a) Poor stability at reduced values of open loop gain
(b) Overdamping
(c) Low-level oscillations
(d) Underdamping
Answer: (c) Low-level oscillations

Electrical Engineering Questions with Answer

Question No. 1. In a control system integral error compensation _______ steady state error
(a) increases
(b) minimizes
(c) does not have any effect on
(d) any of the above
Ans: b

Question No. 2.  If the field circuits of an unloaded salient pole synchronous motor gets suddenly open
circuited, then
 (A) The motor stops.
 (B) It continues to run at the same speed.
 (C) Its runs at the slower speed.
 (D) It runs at a very high speed.
Ans: B

Question No. 3. Two holes in the disc of energymeter are drilled at the opposite sides of the spindle to
(a) improve its ventilation
(b) eliminate creeping at no load
(c) increase its deflecting torque
(d) increase its braking tcrque
Ans: b

Question No. 4. In a stable control system saturation can cause which of the following ?
(a) Low-level oscillations
(b) High-level oscillations
(c) Conditional stability
(d) Overdamping
Ans: a

Question No. 5. Instrument transformers are
(a) potential transformers
(b) current transformers
(c) both (a) and (b)
(d) power transformers
Ans: c

Question No. 6. A 50 Hz, 3-phase induction motor has a full load speed of 1440 r.p.m. The number of
poles of the motor are
 (A) 4. (B) 6.
 (C) 12. (D) 8.
Ans: A

Question No. 7. Mass, in force-voltage analogy, is analogous to
(a) charge
(b) current
(c) inductance
(d) resistance
Ans: c

Question No. 8. A phase shifting transformer is used in conjunction with
(a) D.C. potentiometer
(b) Drysdale potentiometer
(c) A.C. co-ordinate potentiometer
(d) Crompton potentiometer
Ans: b

Question No. 9. Due to which of the following reasons excessive bond width in control systems should
be avoided ?
(a) It leads to slow speed of response
(b) It leads to low relative stability
(c) Noise is proportional to band width
(d) None of the above
Ans: c

Question No. 10. If a transformer primary is energised from a square wave voltage source, its output
voltage will be
(A) A square wave.
(B) A sine wave.
(C) A triangular wave.
(D) A pulse wave.
Ans: A

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Electrical Engineering Question Answers- June 2018

Question No. 1. In a stepper motor the angular displacement
(A) it cannot be used for positioning of work tables and tools in NC machines.
(B) it cannot be readily interfaced with micro computer based controller.
(C) the angular displacement cannot be precisely controlled.
(D) can be precisely controlled.

Answer: (D) can be precisely controlled.

Question No. 2. A control system working under unknown random actions is called
(a) computer control system
(b) digital data system
(c) stochastic control system
(d) adaptive control system


Question No. 3. An ammeter is a
(a) recording instrument
(b) absolute instrument
(c) secondary instrument
(d) integrating instrument

Answer: (c) secondary instrument

Question No. 4 Out of the following methods of heating the one which is independent of supply
frequency is
(A) electric arc heating
(B) induction heating
(C) electric resistance heating
(D) dielectric heating
 Answer: (C) electric resistance heating

Question No. 5. Which of the following part plays important role in over speed protection of a generator ?

(A) Over current relay

(B) Alarm

(C) Differential protection

(D) Governor.

Answer: (D) Governor.

Question No. 6. In a low power factor wattmeter the pressure coil is connected
(a) to the supply side of the current coil
(b) to the load side of the current coil
(c) in any of the two meters at connection
(d) none of the above

Answer:(b) to the load side of the current coil

Question No. 7. The torque-speed characteristics of an a.c. operated universal motor has a
______characteristic and it______ be started under no-load condition.
(A) inverse, can
(B) inverse, cannot
(C) nearly inverse, can
(D) nearly inverse, cannot
 Answer: (B) inverse, cannot

Question No. 8. A.C. servomotor is basically a
(a) universal motor
(b) single phase induction motor
(c) three phase induction motor
(d) two phase induction motor
Answer: (d) two phase induction motor