Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils ? A. Elaiden test B. Reichert-Meissl value test C. Hunter value test D. Iodine value test

Laser welding is widely employed in the __________________ industries ? A. Electronic B. Structural C. Process D. Heavy

Joining of thin foils is preferred to be done by _____________________? A. Gamma rays B. X-raysC. Microwaves D. Gas welding

About _________________ ton of coke is required in a cupola to produce one ton of casting ? A. 0.03B. 0.3 C. 0.8 D. 1.5

Satellites burn off during re-entry to earth’s atmosphere, because of the ____________________? A. Combustion with air B. Gravitational pull by earthC. Friction with earth’s atmosphere D. Loss in weight of the satellite

Filler material used in welding should have _________________ as compared to the parent metal to be welded ? A. Lower melting temperature B. Same melting temperature C. Same compositionD. Both ‘B’ & ‘C’

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process ? A. Cyaniding B. Sherardizing C. Spheroidising D. None of these

With increase in temperature, the electrical conductivity of semiconductors_____________________? A. Increases B. Decreases C. Remain constant D. Either A. or B. depends on the type of semi-conductor

Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same___________________? A. Period increases B. Period decreases C. Group increasesD. Both ‘B’ & ‘C’

The temperature at which the magnetic property of iron disappears (i.e., it becomes nonmagnetic) and its electrical conductivity & specific heat also changes, is called the ‘Curie point’, which is ________________ °C ? A. 768 B. 908 C. 1400 D.…