Which device uses ultrasound waves for getting images of internal organs of human body?
- (A) CT scanner
- (B) X-Ray machine
- (C) MRI scanner
- (D) Ultrasound scanner
- (D) Ultrasound scanner
Photometer is used in measuring:
- (A) Respiration
- (B) Air velocity
- (C) Photosynthesis
- (D) Transpiration
- (D) Transpiration
“Crescograph” is a device used for measuring:
- (A) Crust of earth
- (B) Growth in plants
- (C) Height of mountains
- (D) Depth of oceans
- (B) Growth in plants
Which instrument is used for measuring low temperatures?
- (A) Pyrometer
- (B) Cryometer
- (C) Diplograph
- (D) Electroscope
- (B) Cryometer
What does “Drosometer” measure?
- (A) Rainfall
- (B) Dew
- (C) Darkness
- (D) Light
- (B) Dew
Which one of the following is a device that lets current flow in only one direction?
- (A) Transistor
- (B) Diode
- (C) Resister
- (D) Capacitor
- (B) Diode
Very small time intervals are accurately measured by:
- (A) Pulsars
- (B) White dwarfs
- (C) Quartz clocks
- (D) Atomic clocks
- (D) Atomic clocks
The most suitable thermometer for measuring the boiling point of water is:
- (A) Mercury thermometer
- (B) Alcohol thermometer
- (C) Bimetallic thermometer
- (D) Crystal thermometer
- (A) Mercury thermometer
Your friend wants to see over a wall. What would you suggest him to use?
- (A) Telescope
- (B) Periscope
- (C) Microscope
- (D) Kaleidoscope
- (B) Periscope