RRB ALP & Technician | General Science Day-21

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.

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1). Moon is known as ____________ planet

1. Igneous
2. Metamorphic
3. Fossil
4. Sedimentary

2). Which of the following Equipment Chemical energy into Electrical Energy?

1. Dynamo
2. Microphone
3. Battery
4. Sitar

3).Oxides of non metals are _______ in nature

1. Basic
2. Acidic
3. Neutral
4. All of these

4). Petrochemicals are used in the manufacture of

1. Polythene
2. Detergents
3. Fibers
4. All of these

5). Calculate the value of the ionization constant, Kb, for aniline if the pKb is 9.38.

1. 3.17 x 10^-10
2. 4.16 x 10^-10
3. 6.18 x 10^-10
4. 4.17 x 10^-10

6). The first Cosmic Velocity is known as

1. Escape velocity
2. Orbital velocity
3. Constant Velocity
4. Terminal Velocity

7). Speed of air in the medium of water is ________

1. 5130 m/s
2. 1269 m/s
3. 1482 m/s
4. 1450 m/s

8). Which of the following lens is remedy for Astigmatism?

1. Diverging lens
2. Bifocal lens
3. Cylindrical lens
4. None of these

9). Who invented the Chemotherapy?

1. Celsius
2. Robert Koch
3. Jean Piaget
4. Paul Ehrlich

10). Single set of Chromosome in cell is called

1. Meiosis
2. Cytokinesis
3. Diploid
4. Haploid

Answers :

1). Answer: c)

The Moon is considered a “fossil planet” because of the absence of any strong atmosphere.

2). Answer: c)

Batteries are devices that convert stored chemical energy into useful electrical energy.

3). Answer: b)

Non-metals react with oxygen in the air to produce non-metal oxides. Here are two examples for the non-metals carbon and sulphur. Non-metal oxides such as sulphur dioxide and nitrogen oxide are responsible for acid rain. They dissolve in the water in the clouds to form acidic solutions.

4). Answer: d)

Primary petrochemicals are divided into three groups depending on their chemical structure: Olefins includes Ethene, Propene, Butenes and butadiene. Ethylene and propylene are important sources of industrial chemicals and plastics products. Butadiene is used in making synthetic rubber.

5). Answer: d)

9.38 = – log (Kb)

-9.38 = log (Kb)

Kb = 10-9.38 = 4.17 x 10^-10

6). Answer: b)

The second cosmic velocity is known as the escape velocity. This is the velocity that escapes from the gravitational field of a celestial body.

7). Answer: c)

8). Answer: c)

Astigmatism is a common vision condition that causes blurred vision. It occurs when the cornea (the clear front cover of the eye) is irregularly shaped or sometimes because of the curvature of the lens inside the eye.

9). Answer: d)

Paul Ehrlich was a German Jewish physician and scientist who worked in the fields of hematology, immunology, and antimicrobial chemotherapy. He invented the precursor technique to Gram staining bacteria.

10). Answer: d)

The term haploid refers to a cell (or an organism) with half of the number of homologous chromosomes in somatic cells.

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