Home / Online Test / Thyristor Mounting Questions and Answers Online Test Thyristor Mounting Questions and Answers S Bharadwaj ReddyLeave a comment Thyristor Mounting Questions and Answers Power Electronics Objective Questions & Answers 0% Inter-digitating of gate-cathode regions in SCR devices improves the dv/dt rating di/dt rating thermal resistance I2t rating Correct! Wrong! - Continue >> In the ___________ type of mounting the SCR is pressed between two heat sinks cross-fit mounting press-pak mounting bolt-down mounting stud-mounting Correct! Wrong! - Continue >> For low power SCRs (about 1 Ampere current) _____________ type of mounting is used press-fit bolt-down lead stud Correct! Wrong! - Continue >> The total thermal resistance between junction and ambient θjA is 10°C/W. θjc is 2°C/W. θcs is 4°C/W. θsA = ? 10°C/W 16°C/W 4°C/W 2°C/W Correct! Wrong! - Continue >> Heat dissipation from heat sink mainly takes place by convection absorption none of the mentioned radiation Correct! Wrong! - Continue >> The sink to ambient thermal resistance of SCR θsA depends on the current carrying capabilities depends on the length of the device is independent on thyristor configuration depends on the flatness of the device Correct! Wrong! - Continue >> Pav x (θjc + θcs + θsA) = Sum of junction & ambient temperature Maximum specified temperature Energy lost Difference in temperature between junction & ambient Correct! Wrong! - Continue >> The dv/dt rating of SCR can be improved by using anode-short structure gate-short structure cathode-short structure centre gate thyristor Correct! Wrong! - Continue >> The usual way to accomplish higher gate current for improved di/dt rating is by using varistors twisted cables pilot thyristors op-amps Correct! Wrong! - Continue >> Which of the following thermal resistance parameters depends on the size of the device and the clamping pressure? None θjc θcs θsA Correct! Wrong! - Continue >> Share the quiz to show your results ! Facebook Facebook Just tell us who you are to view your results ! Show my results >> Thyristor Mounting I got %%score%% of %%total%% right Share your results Facebook Facebook Twitter Google+ ↺ PLAY AGAIN ! Previous Post:Thyristor Protection Questions and AnswersNext Post:Lessons in Industrial Instrumentation Related Articles Online Test Power Systems Objective Questions & Answers – Set 22 January 3, 2015 Online Test EMF Generated in the Armature January 2, 2015 Online Test PWM Inverters Objective Questions – 2 December 1, 2014 Online Test Electrical Machines Objective Questions – Set 9 December 2, 2014 Online Test Type D Chopper Objective Questions December 1, 2014 Online Test 1P-Diode Half Wave Rectifiers Questions and Answers – Part 1 December 1, 2014 Online Test Choppers Objective Questions – 1 December 1, 2014 Online Test Analog Electronics Objective Questions – Set 1 May 18, 2017 Online Test Single Phase Semi-Converters Objective Questions – 3 December 1, 2014 Online Test Fast Adder & Serial Adder Objective Questions – Part 2 May 1, 2015 Online Test Armature Windings January 2, 2015 Online Test Electrical Machines Objective Questions – Set 1 December 2, 2014 Also Read : Digital Integrated Circuits Objective Questions – Part 2 May 1, 2015 Applications of Power Electronics Objective Questions – 3 December 1, 2014 Tomography Objective Questions April 2, 2017 Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.