A) Auto transformer B) Variable resistor C) SCR D) Any of the above. Ans : (D)
A) theatres B) auditoriums C) bed room D) all of the above. Ans : (D)
A) ac only B) dc only C) Both ac as well as dc D) none. Ans : (C)
A) Sodium lamps B) Fluorescent lamps C) Halogen lamps D) GLS lamps. Ans : (B)
A) low circuit voltage B) low ballast rating C) low temperature D) any of the above. Ans : (D)
A) putting two lamps in parallel B) eliminating choke C) putting a capacitor across the lamp D) none of the above. Ans : (C)
A) 4400 A B) 5250 A C) 6150 A D) 5950 A. Ans : (A)
A) defective wiring B) a defective tube C) a defective choke D) a short circuited starter. Ans : (D)
A) noise in choke B) stroboscopic effect C) high cost D) all of the above. Ans : (D)
A) wavelength B) frequency C) wavelength and frequency D) wavelength, frequency speed and intensity. Ans : (C)