Important Science Question for RRB JE

Important Science Questions for RRB JE

Here are some of the most Important Science Questions for RRB JE exam that will help candidates enhance their preparation.

1. Which of the following instruments is used for measuring the relative density of liquids
based on the concept of buoyancy?

1. Hygrometer
2. Hydrometer
3. Lactometer
4. Barometer.

Ans. B
Sol.

• Hygrometer – It is used to measure the humidity of the air.
• Hydrometer – It is used to measure the relative density of liquids based on the concept of
  buoyancy.
• Lactometer – It is used to check the purity of milk by measuring its density.
• Barometer – It is used to measure air pressure in a certain environment.

2. Which of the following instrument is used to measure humidity?

1. Anemometer
2. Hygrometer
3. Thermometer
4. Pyrheliometer

Ans. B
Sol.

• A hygrometer is an instrument used for measuring the moisture content in the
  atmosphere.
• These devices measure the water vapour of the atmosphere
• These devices use a material that attracts moisture & that material changes
  depending on hydration.

3. Digestive enzyme is not secreted by which of the following ?

1. Liver
2. Pancreas
3. Salivary Gland
4. Small Intestine

Ans. A
Sol.

• Liver does not secrete any digestive enzymes.
• Digestive enzymes are secreted by the pancreas, stomach, and small intestine and Salivary Gland.
• The four main digestive enzymes are :

1. Lipases
2. Proteates
3. Amylases
4. Nucleases

4. Which of the following substance is not digested by the human body?

1. Sugar
2. Fats
3. Starch
4. Cellulose

Ans. D
Sol.

Cellulose serves as roughage and is helpful in the smooth functioning of bowel (stool)
movement. Rice, sisal, and corn are some examples of Cellulose rich foods.
Some functions of roughage are

• it helps in bowel movement
• it cleans our digestive tracts and protects us from digestive ailments.
• it prevents constipation.
• it helps in retaining water in the body.
• it helps in maintaining optimum levels of blood sugar and cholesterol.

5. Which of the following is the process of producing or developing fruits without the process of pollination and fertilization?

1. Parthenogenesis
2. Parthenocarpy
3. Apogamy
4. Syngamy

Ans. B
Sol.

Parthenocarpy is the process of producing or developing fruits without the process of
pollination and fertilization. Parthenocarpy occasionally occurs as a mutation in nature; if it affects every flower the plant can no longer sexually reproduce but might be able to
propagate by apomixes or by vegetative means. There are two types of Parthenocarpy –
natural and artificial.

6. Monocotyledons and dicotyledons are subdivison of which of following?

1. Gymnosperm
2. Angiosperm
3. Thallophyta
4. Pteridophyta

Ans. B
Sol.

• Monocotyledons and dicotyledons are subdivison of Angiosperm.
• Angiosperms are vascular plants and they are called flowering plants.
• The dicots have two cotyledons in their seeds and the monocots have one cotyledon.

7. Algae and fungi are subdivison of which of following?

1. Gymnosperm
2. Bryophyta
3. Thallophyta
4. Pteridophyta

Ans. C
Sol.

• Algae and fungi are subdivison of Thallophyta.
• Thallophytes are defined by having undifferentiated bodies.
• Algae are aquatic and capable of conducting photosynthesis, while fungi are heterotrophic nonvascular plants and cannot conduct photosynthesis.

8. Who discovered X-Ray?

1. Wilhelm Rontgen
2. William Lee
3. X Rollswick
4. I Thompson

Ans. A
Sol.

• Wilhelm Conrad Rontgen discovered X-rays.
• Rontgen’s discovery occurred accidentally when he was testing whether cathode rays could pass through glass when he noticed a glow coming from a nearby chemically coated screen.
• He dubbed the rays that caused this glow X-rays because of their unknown nature. X-rays are electromagnetic energy waves that act similarly to light rays but at wavelengths approximately 1,000 times shorter than those of light.

9. Which of the following is a characteristic of Sound wave?

1. These are Longitudinal waves.
2. It’s speed depends upon medium.
3. They are produced by vibrations.
4. All of above

Ans. D
Sol.

• Sound wave is Longitudinal Waves.
• It’s speed is maximum in solid and less in liquid and minimum in air.
• It is generated by a source; the sound source creates vibrations in the surrounding medium. Humans can only hear sound waves as distinct pitches when the frequency lies between about 20 Hz and 20 kHz.

10. Which of the following instruments is used for measuring the relative density of liquids based on the concept of buoyancy?

1. Hygrometer
2. Hydrometer
3. Lactometer
4. Barometer

Ans. B
Sol.

• Hygrometer – It is used to measure the humidity of the air.
• Hydrometer – It is used to measure the relative density of liquids based on the concept of buoyancy.
• Lactometer – It is used to check the purity of milk by measuring its density.
• Barometer – It is used to measure air pressure in a certain environment.

Important General Science Questions for RRB JE PDF

Candidates dreaming to ace the exam must check out the 100 most important science questions for RRB JE. To help out such aspirants important science questions for the RRB JE exam have been provided in the pdf below. Download the 100 most important science questions for RRB JE PDF from the link below.

100 Most Important Science Questions for RRB JE PDF

Importance of General Science for RRB JE

The importance of General science can be understood when we look at the lists of subjects included in the RRB JE CBT 1 and the number of questions that appear in the examination from General Science. General Science is one of the major subjects among General Awareness, General Intelligence, Reasoning, and Mathematics. Another important aspect of General Science is there are 30 questions of 30 marks that come in RRB JE CBT 1. 

Therefore, aspirants must take the General Science subject seriously and give it equal importance during RRB JE preparation time. 

RRB JE General Science Syllabus

The general science syllabus for RRB JE consists of three subjects i.e. Physics, Chemistry, and Biology. The RRB JE syllabus of general science is provided in the table below:

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