MCQ
821. Relays can be designed to respond to changes in-
Resistance, reactance or impedance
Voltage and current
Light intersity
All of the above
822. WINDOWS কী?
Antivirus software
Data strong device
Operating system
Programming language
823. 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
824. Which device is used for protection of equipment from damage caused by overload or short circuit?
CVT
Circuit breaker
Current transformer
Lightning arrester
825. 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
826. How many relays are used to detect inter phase fault of a three-line system?
One
Two
Three
Six
827. কম্পিউটার মনিটরকে আরও বলা হয়-
DVU
UVD
VDU
CCTV
828. For arc welding-
alternating current with high frequency is used
direct current is used
alternating current with low frequency is used
any one of these
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
830. কোন বৈশিষ্ট্যের কারণে RAM স্থায়ী স্মৃতি-স্টোরেজ হিসাবে ব্যবহার অনুপযোগী?
Too Slow
Unreliable
Volatility
Too Bulky
831. www (world wide web)-এর জনক কে?
বিল গেটস
স্টিভ জবস
টিম বার্নার্স-লি
জেফ বেজোস
832. Zero sequence current is used for relaying purpose only in the case of--
Phase over-current relay
Phase impedance relay
Ground over-current relay
Ground impedance relay
833. সিগন্যালের পারস্পরিক রূপান্তর করে-
রাউটার
হাব
গেটওয়ে
মডেম
834. কোনটি সর্বোচ্চ তথ্য সংরক্ষণ করতে সক্ষম?
Hard disk
CD
RAM
3.5 HD floop disk
835. A fuse wire is made of-
Copper
Tungsten
Nichrome
Lead-tin alloy
836. MCB stands for-
Miniature Circuit Breaker
Minimum Capacity Breaker
Molded Circuit Breaker
Maximum Capacity Breaker
837. DC shunt relays are made of--
Few turns of thin wire
Few turns of thick wire
Many turns of thin wire
Many turns of thick wire
838. 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
839. 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
840. একটি Hard disk তৈরি হয় যা দিয়ে, তা হলো-
semiconductor memory devices
magnetic disk
metallic disk
magnetic tape