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.
[WpProQuiz 2747]
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- 1. Force of Attraction between the molecules of different substances is called _______
- Cohesive force
- Adhesive Force
- Surface Tension
- Capillarity
- The longitudinal mechanical waves having frequencies less than 20Hz is _________
- Supersonic Waves
- Infrasonic Waves
- Ultrasonic Waves
- None of these
- Bitumen is used in
- Electric generators
- Road surfacing
- Coal tar
- Natural Gas
- Which one of the following metal reacts vigorously with oxygen and water?
- Sodium
- Potassium
- Calcium
- Magnesium
- Which of the following Chemical Compound used as Rat Killer?
- Hydrogen Peroxide
- Zinc Phosphide
- Sodium Nitrate
- Copper Salphate
- Name the study of possibility of life space.
- Entomology
- Euthenics
- Exobiology
- Etiology
- Which of the following polymer used in Nonstick Kitchen ware?
- Vinly rubber
- Bakelite
- Lexan
- Teflon
- What is the scientific name of Mustard?
- Bos Indicus
- Brassica campestris
- Cicer arietinum
- Mangifera Indica
- The fluid that found outside the nuclear membrane is called
- Nucleoplasm
- Cytoplasm
- Mitochondria
- Protoplasm
- Which of the following enzyme that converts the starch into soluble sugar?
- Amylase
- Lipase
- Trypsin
- Erepsin
Answers:
1.Answer: B
This is the same between identical and different molecules. At macroscopic level, the attraction between different compounds is called adhesion (liberally translated as clinging to), and the attraction that keeps structures of identical compounds together is called cohesion (clinging together)
2.Answer: B
The term “infrasonic” applied to sound refers to sound waves below the frequencies of audible sound, and nominally includes anything under 20 Hz. Sources of infrasound in nature include volcanoes, avalanches, earthquakes and meteorites.
3.Answer: B
The primary use (70%) of asphalt is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete. Its other main uses are for bituminous waterproofing products, including production of roofing felt and for sealing flat roofs.
4.Answer: A
Sodium metal react vigorously with oxygen (O2) and water(H2O)
5.Answer: B
Zinc phosphide is an inorganic chemical compound. It is a grey solid, although commercial samples are often dark or even black. It is used as a rodenticide.
6.Answer: C
Exobiology- the branch of science that deals with the possibility and likely nature of life on other planets or in space.
7.Answer: D
Non-stick cookware is covered with a layer of PTFE, commonly referred to as Teflon, which is known for offering almost no friction to anything that comes in contact with it.
The name ‘Teflon’ is actually a brand name (patented by DuPont) of polytetrafluoroethylene (or PTFE).
8.Answer: B
Brassicaceae or Cruciferae is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family
9.Answer: B
Cytoplasm refers to the fluid that fills the cell, which includes the cytosol along with filaments, proteins, ions and macromolecular structures as well as the organelles suspended in the cytosol. In eukaryotic cells, cytoplasm refers to the contents of the cell with the exception of the nucleus.
10.Answer: A
An amylase is an enzyme that catalyses the hydrolysis of starch into sugars. Amylase is present in the saliva of humans and some other mammals, where it begins the chemical process of digestion.
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