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Preparation for the BCS

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BCS preparation part 1 ০১ . বর্তমানে বাংলাদেশে স্থলবন্দর কতটি ? উত্তরঃ ২১টি । [ সর্বশেষ স্থল বন্দর - শেওলা , সিলেট ] ০২ . কোন বছর আমেরিকার স্বাধীনতা ঘোষণা করা হয়েছিল ? উত্তরঃ ১৭৭৬ সালে । ০৩ . ২০১৫ সালের বিশ্ব খাদ্য পুরস্কার লাভ করে কোন বাংলাদেশী ? উত্তরঃ স্যার ফজলে হাসান আবেদ । ০৪ . বাংলাদেশে বিনিয়োগকারী সর্ববৃহৎ বিদেশী সংস্থা ' ইয়ংওয়ান ' কোন দেশের ? উত্তরঃ দক্ষিণ কোরিয়া । ০৫ . উইকিলিকস্ কোন দেশের রাজনৈতিক দল ? উত্তরঃ অস্ট্রেলিয়া । ০৬ . বসনিয়া সংকট সমাধান হয়েছিল কোন চুক্তির মাধ্যমে ? উত্তরঃ ডেটন চুক্তি । ০৭ . আল - জাজিয়া স্যাটেলাইট টেলিভিশনের প্রধান সম্প্রচার কেন্দ্র কোন দেশে অবস্থিত ? উত্তরঃ কাতারে । ০৮ . বিশ্বের কোন নগরটি দুটি মহাদেশে বিস্তৃত ? উত্তরঃ ইস্তাম্বুল । ০৯ . ' রাজবাড়ী ' জেলার পূর্ব নাম কি ছিল ? উত্তরঃ গোয়ালন্দ । ১০ . ' স্বপ্নাতুর কবি ' বলা হয় কাকে ? উত্তরঃ ইসমাইল হোসেন সিরাজী কে ।

Inventions

Image
By Md_Jamal_Molla




1.
What James Watt invented?

A. Diving bell
B. Steam boat
C. Hot air balloon
D. Rotary steam engine
Answer & Explanation
Answer: Option D

Explanation:

Invented in 1765.

2.
Where is the village of Branston, after which the famous pickle is named?

A. Yorkshire B. Lancashire
C. Staffordshire D. Norfolk
Answer & Explanation
Answer: Option C

Explanation:

The village of Branston is in Staffordshire, just south of Burton-on-Trent.

3.
Who invented Jet Engine?

A. Sir Frank Whittle
B. Gottlieb Daimler
C. Roger Bacon
D. Lewis E. Waterman

4.
What invention caused many deaths while testing it?

A. Dynamite
B. Ladders
C. Race cars
D. Parachute
Answer & Explanation
Answer: Option D

Explanation:

Many people who tried to test the first parachutes died by jumping from high places. One attempt was a parachute hat, but the inventor broke his neck while testing it. The first successful parachute was tested from a hot air balloon in 1797, in France, by Jacques Garnerin.

5.
Who invented Gunpowder?

A. G. Ferdinand Von Zeppelin
B. Sir Frank Whittle
C. Roger Bacon
D. Leo H Baekeland
Answer & Explanation
Answer: Option C


6.
Until Victorian times, chocolate was thought of as a drink. When did the first chocolate bar appear?

A. 1828 B. 1831
C. 1825 D. There is no sure date

7.
In which decade was the telephone invented?

A. 1850s B. 1860s
C. 1870s D. 1880s
Answer & Explanation
Answer: Option C

Explanation:

Alexander Graham Bell's notebook entry of 10 March 1876 describes his successful experiment with the telephone. Speaking through the instrument to his assistant, Thomas A. Watson, in the next room, Bell utters these famous first words, "Mr. Watson -- come here -- I want to see you".

8.
Who perfected GENETIC ENGINEERING?

A. Cohen & Boyer
B. Hunt & Davids
C. Sinclair & Roberts
D. Jaysson & Simons
Answer & Explanation
Answer: Option A

Explanation:

Genetic Engineering, the technique of DNA cloning was perfected by Stanley Cohen and Herbert Boyer in 1973.
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