SAMVEG IAS’30Day Plan for UKPCS Prelims2016 test (Day19);SCIENCE & TECHNOLOGY

SAMVEG IAS’30Day Plan for UKPCS Prelims2016 test (Day19);SCIENCE & TECHNOLOGY

Q.1) Consider the following statements regarding Bio-fertilizers

1. The microorganisms in bio-fertilizers restore the soil’s natural nutrient cycle and build soil organic matter.
2. Bio-fertilizers directly increase soil fertility by adding nutrients
3. Rhizobium is a free living nitrogen fixing bacteria

Select the correct code

a) 1 and 2

b) 2 and 3

c) Only 1

d) 1, 2 and 3

Q.2 Recently scientists made a historic detection of ‘Gravitational Waves’. The discovery would represent a scientific landmark, opening the door to an entirely new way to observe the cosmos and unlock secrets about the early universe and mysterious objects like black holes and neutron stars. Consider the following w.r.t Gravitational Waves

1. Gravitational waves can be produced by Humans, Cars and Aeroplanes.
2. The strongest gravitational waves are produced by catastrophic events such as colliding black holes, the collapse of supernovae and the remnants of gravitational radiation created by the birth of the Universe itself.

Select the correct code

a) Only 1

b) Only 2

c) Both

d) None

Q.3 Consider the following regarding Light Emitting Diodes (LED)

1. They work on the principle of electroluminescence
2. White LED’s are used in sterilization and hygiene since it can kill harmful bacteria
3. Blue led can be used for flat screens and date storage since it is used in compact disks to store data.

Select the correct code

a) 1 and 2

b) 2 and 3

c) 1, 2 and 3

d) 1 and 3

Q.4 Which of these options are not a function of Ribosomes?

1. It helps in manufacture of protein molecules
2. It helps in manufacture of enzymes
3. It helps in manufacture of hormones
4. It helps in manufacture of starch molecules

Select the correct code

a) 1 and 2

b) 2 and 3

c) 3 and 4

d) 1 and 4

Q.5 Consider the following statements regarding Lifi technology:

1. Li-Fi technology uses visible light for data transfer and communication.
2. Li-Fi uses common household LED (light emitting diodes) lightbulbs to enable data transfer, boasting speeds of up to 224 gigabits per second.
3. On-off light signals are received as binary signals at very high speed by a receptor.

Which of the above statements are correct?

a) 1 and 2

b) 2 and 3

c) 1 and 3

d) All of the above 

Q.6 Rotavirus is the most common cause of severe vomiting and diarrhoea among infants and young children. Which of the following statements are correct about rotavirus:

1. It is the biggest cause of death of children under 5 years of age in India.
2. India has recently launched an indigenous vaccine for rotavirus called Rotavac.
3. Rotavac has been added in India’s Universal Immunisation Program.

Select the correct code from the following:

a) 1 and 2

b) 2 and 3

c) 1 and 3

d) All of the above 

Q.7 The acoustic frequencies used in sonar systems

1. ultrasonic waves
2. infrasonic waves
3. radio waves
4. audible sound waves

Select the correct code

a) 1 and 2

b) Only 1

c) 1 and 3

d) 1 and 4 

Q.8 Which of the following reactions are irreversible chemical changes:

1. Rusting of Iron
2. Cooking of food
3. Fermentation of grapes
4. Formation of ozone

Select the correct code from the following:

a) All of the above

b) 1,2 and 3

c) 2,3 and 4

d) 1,3 and 4

Q.9 If someone is suffering from the problem of acidity. What is the ideal thing he should take to have relief?

a) Lemon juice

b) Vinegar

c) Baking soda solution

d) Aerated soft drink

Q.10 Consider the following statements regarding common eye defects:

1. Myopia is near sightedness i.e. a person is unable to clearly see nearby objects.
2. Myopia is corrected using concave lens of suitable power.
3. Hypermetropia is far sightedness i.e. a person is unable to clearly see distant object.
4. Hypermetropia is corrected using a convex lens.

Which of the above statements are incorrect?

a) 1 and 3

b) 2 and 4

c) None of the above

d) All of the above 

Q.11 Consider the following

1. Fibrinogen
2. Globulins
3. Albumins

Which of the above are the components of Plasma?

a) 1 only

b) 2 and 3 only

c) 3 only

d) All

Q.12 When an incandescent electric bulb glows

a) the electric energy is completely converted into light energy

b) the electric energy is partly converted into light energy and partly into heat energy

c) the light energy is converted into electric energy

d) the electric energy is converted into magnetic energy