VSSC Technician Electronic Mechanic Paper 2019

Vikram Sarabhai Space Centre Technician Electronic Mechanic Paper 2019

What is the color code for a 3300 Ohm, +/-5% resistor?
(a) Orange, Orange, Red, Gold
(b) Orange, Orange, Black, Silver
(c) Red, Red, Black, Gold
(d) Red, Red, Brown, Silver

A logic function of how many inputs can be simplified using a Karnaugh map with 4 rows and 4 Columns?
(a) 2
(b) 4
(c) 8
(d) 16

A diode used as a voltage regulator
(a) Zener diode
(b) Schottky diode
(c) Fast recovery diode
(d) Light emitting diode

In a battery, four cells are connected in parallel. Each cell has a rating of 1.5 V and 4 AH. The ampere hour rating of the battery is
(a) 4 AH
(b) 16 AH
(c) 1.5 AH
(d) 6 AH

Three numbers of 120 pF capacitors are connected in series, the effective capacitance is
(a) 40 pF
(b) 120 pF
(c) 360 pF
(d) 240 pF

Current in a circuit is
(a) Charge/ time
(b) Charge x time
(c) Voltage/ time
(d) voltage x time

An advantage of switched mode power supply is
(a) Low ripple and noise
(b) EMI related issues are less
(c) High efficiency
(d) High switching spike

What is the effect of increasing the gauge of the wire from 22A WG to 26A WG, all other parameters remaining the same?
(a) Resistance increases
(b) Resistance decreases
(c) Resistance remains the same
(d) None of theses

Doping material for p type semiconductor is
(a) Arsenic
(b) Antimony
(c) Bismuth
(d) Gallium

Among the following which has the maximum efficiency?
(a) Incandescent lamp
(b) CFL
(c) LED
(d) Fluorescent Lamp