A Fahrenheit Thermometer indicates a temperature of 14°F. its corresponding reading on the Celsius scale will be:
- (A) -20°C
- (B) -10°C
- (C) 10°C
- (D) None of these
- (B) -10°C
Video camera is used to convert:
- (A) Heat into X-rays
- (B) Sound into electrical signals
- (C) Electrical signals into pictures
- (D) Pictures into electrical signals
- (D) Pictures into electrical signals
Water vapor beyond the dew point results in:
- (A) Precipitation
- (B) Condensation
- (C) Formation of ice
- (D) None of these
- (B) Condensation
Medicines used to kill weeds are known as:
- (A) Insecticides
- (B) Fungicides
- (C) Herbicides
- (D) None of these
- (C) Herbicides
Which one of the following sets of color combinations is added in color TV?
- (A) Red, Green and Blue
- (B) Orange, Black and Violet
- (C) White, Red and Yellow
- (D) Blue, Purple and Green
- (A) Red, Green and Blue
The chemical used for killing birds is called:
- (A) Pesticide
- (B) Avicide
- (C) Ovicide
- (D) None of these
- (B) Avicide
Which one of the following is air-borne disease?
- (A) Typhoid
- (B) Rabies
- (C) Measles
- (D) None of these
- (C) Measles
Chemical substance used to kill insects is called:
- (A) Fungicide
- (B) Weedicide
- (C) Insecticide
- (D) None of these
- (C) Insecticide
The sky appears blue because the earth’s atmosphere:
- (A) Scatters blue light
- (B) Reflects blue light
- (C) Transmits blue light
- (D) None of these
- (A) Scatters blue light
Ultraviolet rays coming from sun are filtered by:
- (A) Carbon dioxide
- (B) Ozone layer
- (C) Helium
- (D) None of these
- (B) Ozone layer