ELECTRICIAN 2nd YEAR MODULE – Circuit Breakers and Relays ONLINE TEST July 2, 2025July 2, 2025 by admin TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<123456789101112131415>> 0% Question 1 of 15 1. What is the function of relay to the breaking operation of circuit breaker in control circuit? Analyzing the condition of breaker Interpreting the fault situation to operate breaker Controlling the Speed in case of fault Sensing the fault quantitiesQuestion 1 of 15Question 2 of 15 2. Which circuit breaker is used as a switch and protective device in the domestic wiring circuit? Moulded case circuit breaker Air circuit breaker Miniature circuit breaker Earth Leakage circuit breakerQuestion 2 of 15Question 3 of 15 3. What is the defect in an air circuit breaker, if trips intermittently on loading? Incorrect setting of relay Excessive heat Line voltage is too high Insufficient air pressureQuestion 3 of 15Question 4 of 15 4. What is the defect in a oil circuit breaker if the oil heats up excessively? Poor dielectric strength Excessive load Defective tripping mechanism Line voltage is too highQuestion 4 of 15Question 5 of 15 5. Which type of relay is used in both A.C and D.C supply? Clapper-type armature relay Reed relay Thermal relay Impulse relayQuestion 5 of 15Question 6 of 15 6. Which circuit breaker is installed along with wiring circuit against leakage current protection? OCB MCCB MCB ELCBQuestion 6 of 15Question 7 of 15 7. What is the function of Buchholz relay in power transformer? Open circuit and earth fault protection Over load and short circuit protection Open circuit and over voltage protection Over voltage and earth fault protectionQuestion 7 of 15Question 8 of 15 8. What is the cause for the defect if phase to ground fault on the transmission line? Insulation failure Fuse failure Components failure Human errorQuestion 8 of 15Question 9 of 15 9. Which type of load is protected by 'G' series MCB? Ovens Geysers Air conditioners General lighting systemsQuestion 9 of 15Question 10 of 15 10. What is the name of circuit breaker? Air break circuit breaker Air blast circuit breaker Vacuum circuit breaker Oil circuit breakerQuestion 10 of 15Question 11 of 15 11. Which relay hold their contacts in position after power is cutoff? Reed relay Current relay Latching relay Voltage relayQuestion 11 of 15Question 12 of 15 12. What is the pick-up voltage in a over voltage relay indicated? Maximum voltage rating of relay Minimum voltage rating of relay Working voltage of relay Minimum voltage to start the relayQuestion 12 of 15Question 13 of 15 13. What is the effect, if the test button marked as 'X' is closed permanently in ELCB? Circuit functions normally Circuit will not trip on leakage Circuit trips intermittently Circuit switch off completelyQuestion 13 of 15Question 14 of 15 14. How the rupturing capacity of circuit breaker is rated? KV MVA KVAR KWQuestion 14 of 15Question 15 of 15 15. What is the purpose of trip coil used in circuit breakers? Emergency operation Accurate operation Easy operation Remote operationQuestion 15 of 15 Loading...
