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Showing posts with label aai electrical exam papers. Show all posts
Showing posts with label aai electrical exam papers. Show all posts

Tuesday, 15 October 2013

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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