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MCQ
822. Which is the main relay for protecting up to 90% of the transmission line-length in the forward direction?
Directional over-current relay
Mho relay
Carrier current protective relay
Impedance relay
824. Lightning arrester is used for-
Protection of equipment from external lightning
Protection of equipment from short circuits
Protection of equipment from open circuits
All of the above
825. কোন বৈশিষ্ট্যের কারণে RAM স্থায়ী স্মৃতি-স্টোরেজ হিসাবে ব্যবহার অনুপযোগী?
Too Slow
Unreliable
Volatility
Too Bulky
829. একটি কম্পিউটারের Basic components হচ্ছে-
Input/Output devices, RAM and motherboard
Keyboard, monitor, memory and CPU
ক এবং খ উভয়ই
Keyboard, hard disk, processor and monitor
833. Which one of the following relay has the capability of anticipating the possible major fault in a transformer?
Over current relay
Differential relay
Buchholz relay
Over-fluxing relay
834. Material used for fuse must have--
Low-melting point & low-specific resistance
High-melting point & low-specific resistance
High-melting point & high-specific resistance
Low-melting point & high-specific resistance