1.Which instrument is used to measure sound under water ?
A.Hygrometer
B.Hygroscope
C.Hypsometer
D.Hydrophone
2.Which instrument is used to measure pressure of gases ?
A.Manometer
B.Machmeter
C.Magnetometer
D.Micrometer
3.Which instrument is used to measure heat radiation ?
A.Radar
B.Salinometer
C.Refractometer
D.Radio micrometer
4.Which instrument is used to measure strength of direct current ?
A.Stroboscope
B.Streoscope
C.Tangent Galvanometer
D.Tachometer
5.K. Macmillan invented
A.Bicycle
B.Barometer
C.Calculating Machine
D.Centigrade Scale
6.Thomas Alva Edison invented
A.Cinema
B.Cine Camera
C.Computer
D.Cinematograph
7.Alfred Nobel invented
A.X ray
B.Diesel Engine
C.Dynamite
D.Dynamo
8.David Hughes invented
A.Machine Gun
B.Microphone
C.Microscope
D.Motorcycle
9.Marie and Pierre Curie invented
A.Radio
B.Radium
C.Radar
D.Refrigerator
10.Alexander Graham Bell invented
A.Telephone
B.Telescope
C.Television
D.Tank
