(a) Bernor Bon Bron
(b) J. Robert Opan Heemar
(c) Adberd Taylor
(d) Samual Cohen
Ans: (a)
224. Who developed the hydrogen bomb? [SSC 2002]
(a) Bernor Bon Bron
(b) J. Robert Opan Heemar
(c) Adberd Taylor
(d) Samual Cohen
Ans: (b)
225. Who was the inventor of electron microscope? [SSC 2004]
(a) Nol & Ruska
(b) Robert Koach
(c) Leewan Hock
(d) C.P. Swansun
Ans: (a)
226. Who was the inventor of scooter [RRB ASM/GG 2005]
(a) Brad Shaw
(b) Damlar
(c) Einstein
(d) Formich
Ans: (d)
227. Relative humidity is measured by: [UPPCS (Pre) 1996, CPO SI 2003]
(a) Hydrometer
(b) Hygrometer
(c) Lactometer
(d) Potentiometer
Ans: (b)
228. Which one of the following is used in measuring altitudes? [RRB TC/CC
2002]
(a) Barometer
189