Science Objective Questions asked in various exams
The following are the most important science objective questions asked in various exams. Frequently asked science objective questions
1) Sound signals of television are?
Ans) Frequency Modulated
2) In which form sound traveled?
Ans) Longitudinal wave
3) Sound cannot pass through?
Ans) Vacuum
4) Which device is used for object detection in the deep sea?
Ans) Sonar
5) The minimum intensity of sound in which a normal human ear can detect?
Ans) 10 dB
6) DB unit is used for?
Ans) The intensity of sound
7) Stethoscope which is used by the doctor, works on which principle?
Ans) reflection of sound
8) What is studied in Acoustics?
Ans) Sound
9) Bats can detect obstacles because they generate?
Ans) Ultrasonic sound waves
10) What is the approximate frequency of ultrasonic waves?
Ans) More than 20000 Hz
11) The sound wave has the maximum velocity?
Ans) In solid
12) According to the WHO the standard audio capability range of a healthy human being is?
Ans) 5-10 DB
13) Colling in refrigeration is done to?
Ans) Evaporation of a volatile liquid
14) Therm is the unit of?
Ans) Heat
15) Why two thin shirts can keep us warmer than a single thick shirt in winter?
Ans) Air layer between two shirts behaves like insulating media
16) In severe winter, the water pipes in cold countries burst because?
Ans) Water expands on freezing
17 A gap is left between two rails of a railway track to accommodate?
Ans) Linear expansion of the metal
18) Muds house is cooler in summer and warmer in winter as compared to the brick house because?
Ans) Soil is the bad conductor of heat
19) The heat from the sun reaches to earth by the process of?
Ans) Radiation
20) The atmosphere is heated mainly by? Most Important General Science Questions
Ans) Radiation
