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Tuesday 15 October 2013

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aai electrical exam papers,aai electrical and electronics questions,aai electronics sample questions

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Airport Authority Of  India (AAI)
Executive Trainee Exam
Electronics and Electrical Model Questions

Q.1.Shunt­ wound Generators (self­ excited) used for
  • Boosters
  • Charging Batteries
  • a & b are correct
  • None of the above.
Q.2.If a generator gives spark on commutator the reason is
  • Overload
  • Armature Short circuit
  • a & b are correct
  • None of the above.
Q.3.The equipment required for protection of transformers.
  • Breather
  • Conservator
  • Emergency release
  • Temperature Gauge
Q.4.Why flux is used for soldering?
  • To remove oxides from the surface to be soldered
  • it is used as a paste
  • without flux cannot solder
  • None of the above.
Q.5.Empire cloth is used for
  • Overhead lines
  • switches.
  • Insulating the machines while winding
  • None of the above
Q.6.Thermal efficiency is defined as the ratio of
  • Output Energy / Input Energy.
  • (Output Energy / Input Energy) x 100
  • Useful heat / Total heat
  • (Useful heat / Total heat) x 100
Q.7.Moving iron attraction type meter used for
  • Measure current in A.C
  • Measure current in D.C
  • a & b are correct
  • None of the above
Q.8.Moving coil instrument used in
  • ac only
  • dc only
  • both ac & dc
  • None of the above
Q.9.Fluorescent lamp circuit is a
  • Series Circuit
  • Parallel Circuit
  • Combination of series & Parallel Circuit
  • None of the above
Q.10.In Fluorescent lamp circuit why choke is used
  • it gives low Voltage impulse for starting lamp
  • It gives high Voltage impulse for starting lamp
  • It prevent the lamp from over voltages
  • it acts as a stabillizer
Q.11.Alternators are rated in
  • KW .
  • KVA
  • KVAR
  • None of the above
Q.12.The inverse of reluctance is called
  • Permence
  • Permittance
  • Saturation
  • None of the above
Q.13.Megger instrument is used for
  • Testing the insulation resistance of the circuit
  • Voltage measurement
  • Current measurement
  • None of the above
Q.14.Cinema Projector works in
  • AC
  • DC
  • Both AC & DC 
  • None of the above
Q.15.Horse power is the unit of
  • Thermal Power
  • Electrical Power
  • Mechanical Power 
  • None of the above
Q.16.Fusing factor ratio is
  • Current rating of fusing element \ Minimum fusing current
  • Minimum fusing current \ Current rating of fusing element
  • fusing factor not have ratio
  • None of the above
Q.17.The transformer neutral is earthed in the secondary reason is
  • Prevent from over voltages
  • Prevent from over current
  • For testing the phase at any point
  • None of the above
Q.18.Hot­ wire type instrument used in
  • AC only
  • DC only
  • Both AC & DC
  • None of the above
Q.19.Charging rate for lead acid battery
  • Charging current = capacity \ hour
  • Charging current = hour \ capacity
  • Charging current = Capacity x Hour
  • None of the above
Q.20.Conductance is a reciprocal of
  • Voltage
  • Current
  • Resistance
  • None of the above
Q.21.Form factor is defined as the ratio of
  • Average value \ r.m.s value
  • Maximum value \ r.m.s value
  • r.m.s value \ average value
  • None of the above
Q.22.Maxwell­ wien bridge is used for measuring
  • Inductance
  • Capacitance
  • Voltage
  • None of the above
Q.23.555 timer is compatible with
  • TTL logic circuits
  • CMOS logic circuits
  • TTL & CMOS logic circuits
  • None of the above
Q.24.AND gate performs
  • Addition
  • Subtraction
  • Divison
  • Multiplication
Q.25.Output for the following gate is
  • Y = A . B
  • Y = A + B
  • Y = 0
  • None of the above
Q.26.Choose the associative Law
  • A + ( B + C ) = ( A + B ) + C
  • A ( B + C ) = AB + AC
  • (AB) C = A (BC)
  • A & C are correct.
Q.27.High ­ voltage ink film resistor voltage range up to
  • 500KV
  • 250KV
  • 725KV
  • 1000KV.
Q.28.Damping Force produced by
  • air frictions
  • Eddy Current
  • Fluid Friction
  • All of the above
Q.29.Which one of the following is high pressure boiler?
  • La­mount Boiler
  • Benson boiler
  • a & b are correct
  • None of the above
Q.30.For charging battery the following method is used
  • Variable Current System
  • Constant Current System
  • Constant Voltage System
  • b & c are correct.
Q.31.Ohm's Law does not apply to
  • Linear Devices
  • non­linear devices.
  • Series circuit
  • None of the above
Q.32.Susceptibility is defined as the ratio of
  • intensity of magnetisation \ magnetising force.
  • magnetising force \ intensity of magnetisation
  • material \ Vacuum
  • None of the above
Q.33.Varistor is a
  • Linear resistor
  • Non­Linear resistor.
  • Capacitor
  • None of the above
Q.34.Battery ratings are in
  • KW
  • KVA
  • AH
  • None
Q.35.which one of the following is idempotent law
  • A . A = A
  • A + A = A
  • a & b are correct
  • None of the above
Q.36.SMD* is a
  • Transistor
  • Resistor
  • Hard disk drives
  • None of the above
Q.37.Which one of the following material is used for Violet LED?
  • Indium Gallium Nitride
  • Boron Nitride
  • Aluminium Nitride
  • Zinc Soloride
Q.38.Capacitor can be used as a
  • Temporary Battery
  • Primary Battery
  • Secondary Battery
  • None of the above
Q.39.Match the following List ­I with List ­ II List ­ I List ­ II
1. Chemical effect           a. Lead­acid
2. Trickle Charging         b. alkaline ­ manganese
3. Primary Battery          c. Keep it fully Charged
4. Secondary Battery     d. d.c. ampere­ hour meters
  • 1­d, 2­c, 3­b, 4­a
  • 1­c, 2­d, 3­b, 4­a
  • 1­a, 2­b, 3­c, 4­d
  • 1­b, 2­a, 3­d, 4­c
Q.40.Reciprocal of power factor is
  • Apparent Power
  • Active Power
  • Q ­ Factor of a coil
  • None of the above

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