RRB ALP 2018 Practice Test Papers | General Science (Day-1)

Dear Aspirants, Here we have given the Important RRB ALP & Technicians Exam 2018 Practice Test Papers. Candidates those who are preparing for RRB ALP 2018 can practice these questions to get more confidence to Crack RRB 2018 Examination.

RRB ALP & Technician | General Science Day-1

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  1. Which of the following is an antibiotic?
  1. Sodium Bicarbonate
  2. Alcohol
  3. Yeast
  4. Streptomycin
  1. Which section of DNA provides information for one protein
  1. Nucleus
  2. Chromosomes
  3. Trait
  4. Gene
  1. The life span of Red Blood cells is
  1. 100 days
  2. 110 days
  3. 120 days
  4. 80 days
  1. Which Life process converts chemical energy into heat energy?
  1. Excretion
  2. Nutrition
  3. Respiration
  4. Transpiration
  1. Lampbrush chromosomes are seen in
  1. Prophase
  2. Mitotic metaphase
  3. Meiotic prophase
  4. Mitosis
  1. Which of the following group of gases cause Photochemical smog?
  1. O3, PAN, and Co
  2. O2, PAN and NO2
  3. O3, PAN, and H2O
  4. HC, PAN and No
  1. Who is the inventor of Wireless telegram?
  1. Albert Einstein
  2. Gold stein
  3. C.V. Raman
  4. Marconi
  1. The resistance of a conductor is directly proportional to
  1. Its area of cross
  2. Density
  3. Melting point
  4. Length
  1. In optics an object which has higher refractive index is called
  1. Optically rarer
  2. Optically denser
  3. Optical density
  4. Refractive index
  1. The persistence of vision for human eye is
  1. 1/10th of a second
  2. 1/16th of a second
  3. 1/6th of the second
  4. 1/18th of a second

Answers:

1.Answer: D

2.Answer: D

The order of these pairs of bases along the DNA molecule codes for all the different proteins. A section of DNA that codes for one particular protein is called a gene. Each chromosome contains thousands of different genes. The genetic code of the DNA always remains safe inside the nucleus.

3.Answer:  C

Human red blood cells are formed mainly in the bone marrow and are believed to have an average life span of approximately 120 days.

4.Answer: c.

Respiration is a chemical reaction that happens in all living cells, including plant cells and animal cells. It is the way that energy is released from glucose so that all the other chemical processes needed for life can happen. Do not confuse respiration with breathing (which is properly called ventilation).

5.Answer: c.

Lampbrush chromosomes are a special form of chromosome found in the growing oocytes (immature eggs) of most animals, except mammals. They were first described by Walther Flemming in 1882.

6.Answer:  C

That mixture of bad chemicals is called photochemical smog. The chemicals in photochemical smog include nitrogen oxides, Volatile Organic Compounds (VOCs), ozone, and PAN (peroxyacytyl nitrate).

7.Answer: D

Guglielmo Marconi, 1st Marquis of Marconi was an Italian inventor and electrical engineer known for his pioneering work on long-distance radio transmissionand for his development of Marconi’s law and a radio telegraph system.

8.Answer: D

The resistance of a wire is proportional to its length, and inversely proportional to its cross-sectional area. The constant of proportionality is called the resistivity of the material making up the wire.

9.Answer: D

In optics, the refractive index or index of refraction of a material is a dimensionless number that … This implies that vacuum has a refractive index of 1, and that the frequency (f … Hauksbee, who called it the “ratio of refraction”, wrote it as a ratio with a fixed … For infrared light refractive indices can be considerably higher.

10.Answer: B

Persistence of vision refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. The illusion has also been described as “retinal persistence”,”persistence of impressions”, simply “persistence” and other variations.

 

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