Welcome to your Circuit Breaker 1.Which one of the following is not a type of circuit breaker? A. DCB B. VCB C. OCB D. MCB2.Above 33kV which circuit breaker is preferred? A. Vacuum B. SF6 C. Oil D. None of the above Circuit breaker is a ……….. A. On load device B. Off load device C. On load tap changing device D. Inductive device4.circuit breaker can also break capacitive and inductive currents. A. True B. False In circuit breaker current is interrupted at current zero. A. True B. False6.SF6 is a ………… gas A. Electronegative B. Colourless C. Odourless D. All of the above7.IEC standard applicable for circuit breaker is A. IEC 62271-102 B. IEC 62271-103 C. IEC 60044 D. IEC 62271-100 SF6 gas does not cools fast, hence it is good for insulation. A. True B. False We can not operate circuit breaker manually. A. True B. False10.Which one of the following is not a part of circuit breaker? A. Interrupter B. Heat cylinder C. Nozzle D. Winding E. Support insulator11.Arc is stuck between the main contacts of circuit breaker. A. True B. False 12. Arc is stuck because of A. Less Insulation B. Ionization of air C. Corona effect D. Doubling effect13.What is the pressure of SF6 gas inside the breaker? A. 8 bar B. 2 bar C. 4 bar D. 6 bar The voltage that appears across circuit breaker contact at current zero during arcing period is known as A. Arc voltage B. Recovery voltage C. Restrike voltage D. Reappeared voltage Which is the most difficult duty to break? A. Resistive B. Inductive C. Capacitive D. Both B and C E. None of the above.16.PF of load can affect the performance of the breaker. A. True B. False, pf has no relation with CB which one of the following is not a standard voltage? A. 145 kV B. 375kV C. 245kV D. 420 kV18. Which one of the following is not a circuit breaker manufacturer? A. Siemens B. ABB C. Alstom D. Crompton greaves E. fujitsu Which standard applicable for sf6 gas? A. IEC 60376:2005 B. IEC 60375:2005 C. IEC 60374:2005 D. IEC 60370:2005 Making current capacity of circuit breaker is 2.5 times its rated breaking current. A. True B. False (94) Premium WordPress Themes DownloadDownload Nulled WordPress ThemesDownload Premium WordPress Themes FreeDownload Premium WordPress Themes Freefree online coursedownload micromax firmwareDownload WordPress Themesfree download udemy courseShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Test on Circuit Breaker Gaurav J | By Reading | May 29, 2017 7:59 pm