Online GK Series

This site is dedicated to the aspirants of competitive exams SSC, UPSC, Railways, Postal Assistants, Bank, GATE and NET

Get Attractive Job

General Science Objective Questions and Answers | GK for SSC Data Entry Operator Exam

21 In a filament type light bulb most of electric power consumed appears as :
A LED light
B Infra red rays
C Ultra violet rays
D Fluorescent light

Answer: Option [B]
22 The purpose of using Diode is :
A amplification
B purification
C modulation
D demodulation

Answer: Option [B]
23 What is the minimum escape velocity of rocket to be launched into space ?
A 4KM/Sec
B 8KM/Sec
C 11KM/Sec
D 13KM/Sec

Answer: Option [C]
24 Who invented Electron Microscope ?
A Galileo
B Knoll and Ruska
C Robert Koch
D Leeuwenhook

Answer: Option [B]
25 What is the wavelength of visible spectrum ?
A 1300A0 - 3000A0
B 3900A0 - 7600A0
C 7800A0 - 8000A0
D 8500A0 - 9800A0

Answer: Option [B]


Important EBooks for Competitive Exams