SUPARCO
POST: ASSISTANT MANAGER (ELECTRONICS (SPS-8)) Time allowed 2 hours 1/2 –ve marking calculator allowed WRITTEN TEST (TECHNICAL SECTION ONLY)
BASIC ELECTRICAL: Basic terms, series & parallel combination. Current, voltage, resistance, power, capacitor, resistor & inductor concepts & related problems etc. BASIC ELECTRONICS: Transistor basic terms, transistor configuration (CE, CC, CB with regard of i/p & o/p impedance & power, current & voltage gain). Basics of transistor biasing (voltage divider biasing), switching & amplification. Amplifier frequency response. Effect of Coupling & bypass capacitor, harmonic distortion in amplifiers. Temperature coefficient of resistance. Diode basics terms, rectifier with types & related problems. INTEGRATED ELECTRONICS: Opamp, configuration & related terms like slew rate, gain, CMRR, Applications of Opamp, analog filters & responses. DIGITAL SIGNAL PROCESSING: Nyquist sampling theorem, ADC conversion process, signal representation (Fourier series) & types. ELECTRICAL CIRCUITS: Superposition, Thevinian & Norton theorems, reactance (capacitive, inductive). RC time constant. Basic concepts from RC, RLC, RL series & parallel circuit. Mutual inductance & KWH. VDR, CDR, KVL, KCL & related problems. COMMUNICATION: Basics of Communication, Modulation techniques (AM, FM, ASK, FSK, QPSK, PCM etc), Communication transmitters and receivers, Multiplexing techniques (FDM, TDM), Noise, SNR, channel capacity Telecommunication technologies & their data rates.
Junaid Shaikh (05ES42)
ELECTROMAGNETISM: Antenna terms, electric & magnetic fields, Path loss, Electromagnetic spectrum ranges, frequency, wavelength & related problems. CONTROL ENGINEERING: Open & Closed Loop system basic concepts, stability from transfer function & poles & zeros of a system. Closed loop transfer function of a control system, stability of a discrete time control system, Nyquist stability criteria, root locus approach, bode plot, 2nd order system & its response at different values of damping ratio (finding related terms including value of K & steady state error) & PID controllers types & use. INDUSTRIAL ELECTRONICS: THYRISTOR, SCR, TRIAC, DIAC, Protection techniques for power devices, 3-phase & I-phase controlled rectifiers, switching regulator & inverter basics. Duty cycle & harmonic distortion in power devices. Speed (RPM) control & load regulation of dc motor & types of power electronic devices & circuits. CELLULAR COMMUNICATION: Cellular terms like re-use distance, Hands off & ON, co-channel interference, frequency hopping, cell site, cellular coverage enhancement techniques MICROPROCESSOR: Basic terms, finding no of address lines & memory problems. Registers, interrupts & addressing modes of 8085 & 8088 microprocessors.
Junaid Shaikh (05ES42)
