hi i am electronics & telecomm engg & appling 4 the AAI jr executive (electronics/ATC) written test. pls forward me the syllabus & old question papers.I will be very much thankful to you. pis inform to mpnisi@gmail.com

0 Answers   AAI Airports Authority Of India,

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How VFD (variable frequency drive) works? What's its function?

1 Answers  

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hi.. i m a fresher in ECE 3rd yr how 2 face the campus placement in any mnc company and what to prepare please mail me in detail.

0 Answers  

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What are the faults that might happen in SCADA ?

0 Answers   Havells,

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What is delay angle or what is firing angle of phase controlled rectifier?

0 Answers  

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What is meant by D-FF? What is the basic difference between Latches and Flip flops? What is a multiplexer? How can you convert an SR Flip-flop to a JK Flip-flop? How can you convert an JK Flip-flop to a D Flip-flop? What is Race-around problem? How can you rectify it? Which semiconductor device is used as a voltage regulator and why? What do you mean by an ideal voltage source? What do you mean by zener breakdown and avalanche breakdown? What are the different types of filters? What is the need of filtering ideal response of filters and actual response of filters? What is sampling theorem? What is impulse response? Explain the advantages and disadvantages of FIR filters compared to IIR counterparts. What is CMRR? Explain briefly. What do you mean by half-duplex and full-duplex communication? Explain briefly. Which range of signals are used for terrestrial transmission? What is the need for modulation? Which type of modulation is used in TV transmission? Why we use vestigial side band (VSB-C3F) transmission for picture? When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency? For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit? BPFSK is more efficient than BFSK in presence of noise. Why? What is meant by pre-emphasis and de-emphasis? What do you mean by 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?

0 Answers   MAHINDRA,

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Tell me about use of heat sinks in digital circuit.

4 Answers   TCS,

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Explain various types of antenna diversity.

0 Answers   Huawei,

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diode made of which semicoductor has highest threshold voltage?

6 Answers  

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what type of quesions asks in interview?

0 Answers   TCS,

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In 8086 why even address location takes two bus cycles whereas odd address location takes only one bus cycle??

2 Answers  

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What is the state if the RED LED is glowing on PWSx card What is the state if the YELLOW LED is glowing on PWSx card

0 Answers   NSN,

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