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11. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively __________________?
A. 7 and 30
B. 10 and 50
C. 2 and 50
D. 13 and 55
12. Which of the following metals reacts violently with water ?
A. Mercury
B. Sodium
C. Calcium
D. Magnesium
13. Steel is welded using the ________________ flame ?
A. Carburising
B. Neutral
C. Oxidising
D. All A, B. & C
14. ________________ is a special constituent of chlorophyll without which photosynthesis is not possible ?
A. Calcium
B. Nitrogen
C. Phosphorous
D. Hydrogen
15. The highest stress that a material can withstand for a specified length of time without excessive deformation is called the ____________ strength ?
A. Creep
B. Endurance
C. Fatigue
D. None of these
16. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ?
A. 5-10
B. 1000-1500
C. 120-500
D. 1500-3000
17. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?
A. 1 : 1
B. 1 : 2
C. 2 : 1
D. 1 : 4
18. Force between the molecules of the same substance is called ______________________ force?
A. Adhesive
B. Cohesive
C. Molecular
D. Vander Walls
19. Quartz is a ________________ material ?
A. Diamagnetic
B. Ferromagnetic
C. Ferroelectric
D. Piezoelectric
20. The majority charge carriers in p-type silicon are______________________?
A. Free electrons
B. Ions
C. Conduction electrons
D. Holes