A. voltage sensitive load from excessive dc power supply output voltages
B. current sensitive load from excessive dc power supply output voltages
C. voltage sensitive load from excessive ac power supply output voltages
D. current sensitive load from excessive ac power supply output voltages
Related Mcqs:
- Gate circuit or triggering circuit of a thyristor is
A. lower power circuit.
B. high power circuit.
C. magnetic circuit.
D. may be low power or high power circuit - In a load commutated DC – DC chopper, the capacitor has a_____________?
A. Symmetric triangular voltage across itself
B. Symmetric rectangular voltage across itself
C. Symmetric trapezoidal voltage across itself
D. Symmetric sinusoidal voltage across itself - To detect an over – current fault condition, the most reliable method is to connect a_____________?
A. Current sensor across IGBT
B. Voltage sensor across IGBT
C. Current sensor in series with IGBT
D. Voltage sensor in series with IGBT - In a flyback converter, the inductor of the buck-boost converter has been replaced by a_____________?
A. Flyback capacitor
B. Flyback resistor
C. Flyback transformer
D. Flyback transistor - What is used to protect the SCR from over current ________________?
A. CB and fuse.
B. Heat sink.
C. Snubber circuit.
D. Voltage clamping device. - When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?
A. CB
B. Snubber circuit
C. Voltage clamping device
D. Fast acting current limiting device (FACL fuse) - How can we protect SCR from thermal conditions _____________?
A. Use of snubber circuit.
B. Using heat sink.
C. Using CB and fuse.
D. Using equalizing circuit - What is used to protect a thyristor from high di / dt conditions__________?
A. Fuse.
B. Snubber circuit
C. Inductor
D. Voltage clamping device - Which of the following is used in SCR to protect from high dV / dt__________________?
A. Snubber circuit
B. Fuse
C. Equalizing circuit
D. Circuit breaker - Dynamic equalizing circuit is used for________________?
A. equal division of voltage across each thyristor
B. equal division of current through each thyristor in parallel
C. equal division of voltage across each thyristor in parallel
D. equal division of current through each thyristor in series
