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ব্যাংক নিয়োগ প্রস্তুতি ⎯ লং কোর্স

পরীক্ষাব্যাংক নিয়োগ প্রস্তুতি ⎯ লং কোর্সতারিখতারিখ অনির্ধারিতসময়15 minutes
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Science & Geography
প্রশ্ন দেখুনঅনুশীলন
ঘনত্ব
উত্তর
উত্তরিতবর্তমানপুনরায় দেখুনঅসম্পূর্ণ

ব্যাংক নিয়োগ প্রস্তুতি ⎯ লং কোর্স

ব্যাংক নিয়োগ প্রস্তুতি ⎯ লং কোর্স · তারিখ অনির্ধারিত · ২২ প্রশ্ন

১.
In which among the following, the speed of sound would be maximum?
  1. ক
    ক) Dry air at 0°C
  2. খ
    খ) Dry air at 30°C
  3. গ
    গ) Humid air at 0°C
  4. ঘ
    ঘ) Humid air at 30°C
  5. ঙ
    ঙ) Cold air at -30°C
সঠিক উত্তর: ঘ
ঘ) Humid air at 30°C
উত্তর
সঠিক উত্তর: ঘ
ঘ) Humid air at 30°C
ঘ
ব্যাখ্যা

The speed of sound in a medium depends on the temperature of the medium. The speed of sound decreases when we go from solid to gaseous state.
In any medium as we increase the temperature the speed of sound increases. The speed of sound will be highest in humid air at 30°C.

২.
Which among the following compounds is most commonly used in the Photochromic lenses?
  1. ক
    ক) Potassium Dichromate
  2. খ
    খ) Silver Chloride
  3. গ
    গ) Potassium ferrate
  4. ঘ
    ঘ) Ferric Chloride
  5. ঙ
    ঙ) Sodium Chloride
সঠিক উত্তর: খ
খ) Silver Chloride
উত্তর
সঠিক উত্তর: খ
খ) Silver Chloride
খ
ব্যাখ্যা
Silver halides and most commonly silver Chloride is used in Photochromic lenses. But for plastic photochromic lenses, some organic products such as oxazines and naphthopyrans are used.
৩.
What is the SI unit of acceleration due to gravity?
  1. ক
    ক) ms-2
  2. খ
    খ) ms-3
  3. গ
    গ) Kgms-2
  4. ঘ
    ঘ) ms-1
  5. ঙ
    ঙ) Joule
সঠিক উত্তর: ক
ক) ms-2
উত্তর
সঠিক উত্তর: ক
ক) ms-2
ক
ব্যাখ্যা
The acceleration due to gravity is the acceleration set up in the body when it falls freely under the effect of gravity alone. The SI unit of acceleration due to gravity is ms-2.
৪.
Which antigen is present in the O blood group?
  1. ক
    ক) Either A or B
  2. খ
    খ) Both A and B
  3. গ
    গ) Neither A nor B
  4. ঘ
    ঘ) O
  5. ঙ
    ঙ) None of these
সঠিক উত্তর: গ
গ) Neither A nor B
উত্তর
সঠিক উত্তর: গ
গ) Neither A nor B
গ
ব্যাখ্যা

There are no antigens present in Blood group O. It has both anti-A and anti-B antibodies in the plasma and also some special “anti-A,B” antibodies. Blood group AB has both A and B antigens, but no antibodies.

৫.
What is the value of the Triple point of water?
  1. ক
    ক) 273.16 K
  2. খ
    খ) 273.16°C
  3. গ
    গ) 0°C
  4. ঘ
    ঘ) -273.16 K
  5. ঙ
    ঙ) 30°C
সঠিক উত্তর: ক
ক) 273.16 K
উত্তর
সঠিক উত্তর: ক
ক) 273.16 K
ক
ব্যাখ্যা
Triple point of water is the temperature at which ice, water and water vapours coexist. The value of the Triple point of water is 273.16 K. Kelvin is the S.I unit of Temperature represented by symbol K.
৬.
Which of the following parts of the eyes controls the size of the pupil?
  1. ক
    ক) Retina
  2. খ
    খ) iris
  3. গ
    গ) Cornea
  4. ঘ
    ঘ) A & C
  5. ঙ
    ঙ) None of the above
সঠিক উত্তর: খ
খ) iris
উত্তর
সঠিক উত্তর: খ
খ) iris
খ
ব্যাখ্যা
The size of the pupil is controlled by the iris. The iris controls the amount of light entering into the eye.
৭.
Which of the gas is not known as green house gas?
  1. ক
    ক) Methane
  2. খ
    খ) Nitrous oxide
  3. গ
    গ) Carbon dioxide
  4. ঘ
    ঘ) Hydrogen
  5. ঙ
    ঙ) Ozone
সঠিক উত্তর: ঘ
ঘ) Hydrogen
উত্তর
সঠিক উত্তর: ঘ
ঘ) Hydrogen
ঘ
ব্যাখ্যা

The list of GreenHouse Gases are as follows:
1) Water vapor
2) Carbon dioxide
3) Methane
4) Nitrous oxide
5) Ozone
6) Chlorofluorocarbons.
Hydrogen is not a GreenHouse Gas.

৮.
Air is a/an-
  1. ক
    ক) Compound
  2. খ
    খ) Element
  3. গ
    গ) Electrolyte
  4. ঘ
    ঘ) Mixture
  5. ঙ
    ঙ) None of the above.
সঠিক উত্তর: ঘ
ঘ) Mixture
উত্তর
সঠিক উত্তর: ঘ
ঘ) Mixture
ঘ
ব্যাখ্যা
Air is a mixture because we can separate its components while in compounds we can not separate it.
৯.
The time required by earth in 360 degree rotation to make a star return to the same position is called _____ day?
  1. ক
    ক) Solar Day
  2. খ
    খ) Sidereal Day
  3. গ
    গ) Real Day
  4. ঘ
    ঘ) Synodic Day
  5. ঙ
    ঙ) None of these
সঠিক উত্তর: খ
খ) Sidereal Day
উত্তর
সঠিক উত্তর: খ
খ) Sidereal Day
খ
ব্যাখ্যা

The spinning of the earth on its polar axis in fact takes 23 hours, 56 minutes and 4.09 seconds for rotation through the 360 degree. This is called sidereal day.
During the time needed by the Earth to complete a rotation around its axis (a sidereal day), the Earth moves a short distance (approximately 1°) along its orbit around the sun.
So, after a sidereal day, the Earth still needs to rotate a small additional angular distance before the sun reaches its highest point. A solar day is, therefore, nearly 4 minutes longer than a sidereal day.

১০.
Which among the following is an area of evergreen forests?
  1. ক
    ক) Amazon Basin
  2. খ
    খ) Zaire Basin
  3. গ
    গ) South-Eastern Asia
  4. ঘ
    ঘ) Western Asia
  5. ঙ
    ঙ) None of the above
সঠিক উত্তর: গ
গ) South-Eastern Asia
উত্তর
সঠিক উত্তর: গ
গ) South-Eastern Asia
গ
ব্যাখ্যা
The south east asia is the evergreen forest area.They have evergreen trees and have high rainfall as well. This is because they are located near the equator. There is no dry season in this area.
১১.
Puerto Rico Trench is located in which of the following oceans?
  1. ক
    ক) Arctic
  2. খ
    খ) Atlantic
  3. গ
    গ) Pacific
  4. ঘ
    ঘ) Indian
  5. ঙ
    ঙ) Arctic
সঠিক উত্তর: খ
খ) Atlantic
উত্তর
সঠিক উত্তর: খ
খ) Atlantic
খ
ব্যাখ্যা
Puerto Rico Trench is the second deepest trench after Mariana trench
১২.
Which among the following countries is the world’s leading producer of synthetic industrial diamond?
  1. ক
    ক) United states
  2. খ
    খ) Congo
  3. গ
    গ) China
  4. ঘ
    ঘ) South Africa
  5. ঙ
    ঙ) Nigeria
সঠিক উত্তর: গ
গ) China
উত্তর
সঠিক উত্তর: গ
গ) China
গ
ব্যাখ্যা
China is the world’s leading producer of synthetic industrial diamonds. Industrial diamonds can be used in cutting, drilling, grinding, and polishing.
১৩.
Which is the largest river system flowing to the Arctic Ocean?
  1. ক
    ক) Mississippi River
  2. খ
    খ) Yenisei River
  3. গ
    গ) Yellow River
  4. ঘ
    ঘ) Amazon River
  5. ঙ
    ঙ) Yalu River
সঠিক উত্তর: খ
খ) Yenisei River
উত্তর
সঠিক উত্তর: খ
খ) Yenisei River
খ
ব্যাখ্যা
The Yenisei River is the largest river system that flows to the Arctic Ocean. It is also the fifth longest river in the world. It flows through two countries i.e Mongolia and Russia.
১৪.
Which of the following is the largest coral reef in the Atlantic Ocean?
  1. ক
    ক) Mesoamerican Reef
  2. খ
    খ) Red Sea Coral Reef
  3. গ
    গ) Andros Barrier Reef
  4. ঘ
    ঘ) Apo Reef
  5. ঙ
    ঙ) None of these
সঠিক উত্তর: ক
ক) Mesoamerican Reef
উত্তর
সঠিক উত্তর: ক
ক) Mesoamerican Reef
ক
ব্যাখ্যা
The Mesoamerican Reef is the largest coral reef in the Atlantic Ocean. It is located in the Caribbean Basin. It is also known as the Great Mayan Reef and it is a World Heritage Site, too.
১৫.
Which is the longest river in Asia?
  1. ক
    ক) Amazon River
  2. খ
    খ) Yangtze River
  3. গ
    গ) Ganges River
  4. ঘ
    ঘ) Yellow River
  5. ঙ
    ঙ) Mississippi River
সঠিক উত্তর: খ
খ) Yangtze River
উত্তর
সঠিক উত্তর: খ
খ) Yangtze River
খ
ব্যাখ্যা
The Yangtze River is the longest river in Asia. It is the third longest river in the world. It flows entirely within China. It is also the longest river in the world to flow within one country.
১৬.
The Danube delta is a part of which among the following countries?
  1. ক
    ক) Romania
  2. খ
    খ) Germany
  3. গ
    গ) Sweden
  4. ঘ
    ঘ) Russia
  5. ঙ
    ঙ) Spain
সঠিক উত্তর: ক
ক) Romania
উত্তর
সঠিক উত্তর: ক
ক) Romania
ক
ব্যাখ্যা
The Danube delta is the second largest river delta in Europe. The greater part of the Danube delta lies in Romania and a small part in Ukraine.
১৭.
The sun reaches its maximum angular distance from the equator at the -
  1. ক
    ক) Zenith
  2. খ
    খ) Solstice
  3. গ
    গ) Equinox
  4. ঘ
    ঘ) Noontime
  5. ঙ
    ঙ) None of these
সঠিক উত্তর: খ
খ) Solstice
উত্তর
সঠিক উত্তর: খ
খ) Solstice
খ
ব্যাখ্যা
Since the ecliptic is tilted 23.5° with respect to the celestial equator, the Sun's maximum angular distance from the celestial equator is 23.5°. This happens at the solstices.
১৮.
Which of the following is the International Date Line?
  1. ক
    ক) Equator
  2. খ
    খ) 0° longitude
  3. গ
    গ) 90° eastern longitude
  4. ঘ
    ঘ) 180° longitude
  5. ঙ
    ঙ) 90° western longitude
সঠিক উত্তর: ঘ
ঘ) 180° longitude
উত্তর
সঠিক উত্তর: ঘ
ঘ) 180° longitude
ঘ
ব্যাখ্যা
180° longitude is the International Date line.
১৯.
The Time of Cairo is 2 hours ahead of Greenwich time. Cairo is situated at -
  1. ক
    ক) 27° East
  2. খ
    খ) 27° West
  3. গ
    গ) 30° East
  4. ঘ
    ঘ) 30° West
  5. ঙ
    ঙ) 28° East
সঠিক উত্তর: গ
গ) 30° East
উত্তর
সঠিক উত্তর: গ
গ) 30° East
গ
ব্যাখ্যা
For every 1° longitude, there is a difference of 4 minutes.
For 2 hrs, there will be a difference of 30°.
So the correct answer is 30° east as Cairo is ahead of Greenwich time.
২০.
The World used to describe the shape of earth is-
  1. ক
    ক) Flat
  2. খ
    খ) Circle
  3. গ
    গ) Sphere
  4. ঘ
    ঘ) Oblate spheroid
  5. ঙ
    ঙ) None of these
সঠিক উত্তর: ঘ
ঘ) Oblate spheroid
উত্তর
সঠিক উত্তর: ঘ
ঘ) Oblate spheroid
ঘ
ব্যাখ্যা
Oblate Spheroid is a term that has been used to describe the shape of the Earth. The Earth is not a sphere.
২১.
Which planet in our solar system is nearly as big as Earth?
  1. ক
    ক) Mercury
  2. খ
    খ) Mars
  3. গ
    গ) Venus
  4. ঘ
    ঘ) Pluto
  5. ঙ
    ঙ) Jupiter
সঠিক উত্তর: গ
গ) Venus
উত্তর
সঠিক উত্তর: গ
গ) Venus
গ
ব্যাখ্যা
Venus is nearly as big as the Earth. As it is very similar to Earth in terms of size, average density, mass & surface gravity. It is also known as Earth's twin.
২২.
Which one of the following is a landlocked country?
  1. ক
    ক) Bulgaria
  2. খ
    খ) Hungary
  3. গ
    গ) Romania
  4. ঘ
    ঘ) Ukraine
  5. ঙ
    ঙ) Spain
সঠিক উত্তর: খ
খ) Hungary
উত্তর
সঠিক উত্তর: খ
খ) Hungary
খ
ব্যাখ্যা
Hungary is a landlocked country located on the Danube River Basin in Central Europe. It is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east, Croatia and Serbia & Montenegro to the south as well as Slovenia and Austria to the west.