CAPF (AC) 2016 (Paper-1) (Question 1-50)

Total Questions: 50

41. Which one of the following statements is not true?

(a) The gravitational force of earth acting on a body of mass 1 kg is 9.8 newton
(b) The force acting on an object of mass 5 kg moving with a uniform velocity of 10 m/s on a frictionless surface is zero
(c) The SI unit of weight is kg
(d) The momentum of a man having mass 100 kg walking with a uniform velocity of 2 m/s is 200 newton second

Correct Answer: (c) The SI unit of weight is kg

Solution:The SI unit of weight is Newton (N). It can be defined as kg m s-2. The weight of an object is defined as the force acting on the object due to gravity. Some standard textbooks define weight as a vector quantity.

The gravitational force of earth acting on a body of mass 1kg is 9.8N. (iii) Force acting on a moving object with uniform velocity on a frictionless surface is zero.

Momentum = m × v

On putting the given values, we get,

m/s =m × v = 100kg × 2m/s = 200Ns

Therefore, the correct option is (c).

42. Which one of the following statements is correct?

(a) Acceleration due to gravity decreases with the increase of altitude
(b) Acceleration due to gravity increases with the increase of depth (assuming earth to be a sphere of uniform density)
(c) Acceleration due to gravity decreases with the increase of latitude
(d) Acceleration due to gravity is independent of the mass of the earth

Correct Answer: (a) Acceleration due to gravity decreases with the increase of altitude

Solution:The altitude is indirectly proportional to the square of the distance from the centre of Earth. This means if altitude increases then acceleration decreases. As the distance is doubled, the gravitational acceleration decreases by a factor of 4. At the surface of the Earth, the acceleration due to gravity is roughly 9.8 m/s² (32 ft/s²). The average distance to the centre of the Earth is 6,371 km (3,959 mi). Therefore, the correct option is (a).

43. A Barometer kept in an elevator reads 760 mm when the elevator is at rest. When the elevator moves in the upward direction with increasing speed, the reading of the Barometer will be:

(a) 760 mm
(b) < 760 mm
(c) > 760 mm
(d) Zero

Correct Answer: (b) < 760 mm

Solution:The earth's magnetic field is generated in the fluid outer core by a self-exciting dynamo process. In the slowly moving molten iron, electrical currents flow and generate the magnetic field. These churning metals such as iron and nickel act like a generator.

The magnetic field lines are closed at the poles and widely separated at other places. The magnetic flux is inversely proportional to the area. Hence, we can say that by increasing the speed of a conductor that moves through a magnetic field, the induced voltage increases. Therefore, the correct option is (b).

44. Which one of the following statements is not correct?

(a) The earth's magnetic field is due to the motion of metals like iron and nickel in the core of the earth
(b) The magnetic field lines of force are widely separated near the poles of a magnet but these lines come closer to one another at other places
(c) If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density decreases
(d) When the speed of a conductor moving through a magnetic field is increased, the induced voltage increases

Correct Answer: (b) The magnetic field lines of force are widely separated near the poles of a magnet but these lines come closer to one another at other places

Solution:The magnetic lines of force come closer to one another near the poles of a magnet but they are widely separated at other places.

45. Let a resistor having 4 ohm resistance be connected across the terminals of a 12 volt battery. Then the charge in coulomb passing through the resistor per second is :

(a) 12
(b) 4
(c) 3
(d) 0.33

Correct Answer: (c) 3

Solution:According to the question,

Resistance = 4 Ohm, voltage = 12 Volts

The SI unit is electric charge is Coulomb. It is defined as the quantity of electricity transported in one second by a current of one ampere. The two types of electric charge are positive and negative.

One ampere is one coulomb per second.

On putting the values, we get,

As per Ohm's law,

Voltage current × resistance

12 volts = current × 4 ohms

Current = 3 amperes

Therefore, the correct option is (c).

46. Arrange the following varieties of silk in India in their order of decreasing production :

1. Muga

2. Eri

3. Mulberry

4. Tasar

Select the correct answer using the code given below :

(a) 3-2-4-1
(b) 3-4-2-1
(c) 2-4-1-3
(c) 2-4-1-3

Correct Answer: (a) 3-2-4-1

Solution:In 2018-19, the production of mulberry is 71.50 per cent, Tasaris 8.44 per cent, or is 19.40 per cent and Mugais 0.66 per cent of the total raw silk production of 35,261 MT. Mulberry silk is the highest quality silk.

Tusar Silk is an exquisite thread obtained from a yellowish-brown wide-winged moth. Eri silkis also called non-violent silkbecauseit does not kill the moth to extract the fibre. Muga silk is known for its durability. Therefore, the correct option is (a).

47. Which of the following are the objectives of the Khadi and Village Industries Commission?

1. To provide employment in rural areas

2. To produce saleable articles

3. To create self reliance amongst people and building up a strong rural community spirit

Select the correct answer using the code given below :

(a) 1, 2 and 3
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1 and 3 only

Correct Answer: (a) 1, 2 and 3

Solution:The objectives that the Khadi and Village Industries Commission (KVIC) are as follows:

To build up an active rural community
To employ in rural areas
To produce a saleable product
To create self-reliance among the economically weaker section
To provide additional livelihood avenues to the village communities
To generate self-employment opportunities through the establishment of micro enterprises by organizing traditional artisans and unemployed youth.
To prevent migration

Therefore, the correct option is (a).

48. Which of the following statements concerning circum-pacific belt are correct?

1. It is an active volcanic realm

2. It is an active seismic realm

3. It is a divergent plate boundary

4. It is prone to Tsunami

Select the correct answer using the code given below :

(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4

Correct Answer: (c) 1, 2 and 4 only

Solution:Volcanic activity is the result of the magma near to Earth's surface gives rise to conditions that give volcanic activity. Hence, this belt is an active volcanic realm. A large number of earthquakes are generated in the crust. Hence, this belt is an active seismic realm. The Circum-Pacific belt is also known as the Ring of fire.

About 80% of tsunamis happen within the Pacific Ocean's "Ring of Fire". Tsunamis may also be caused by underwater landslides or volcanic eruptions. Therefore, the correct option is (c).

49. Which of the following statements relating to solar system is/are correct?

1. Venus and Uranus rotate opposite to the direction of rotation of Earth

2. Venus is the nearest planet to Earth

Select the correct answer using the code given below :

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Correct Answer: (c) Both 1 and 2

Solution:The solar system consists of 8 planets. The order of the planets in the solar system is as follows: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Therefore, we can conclude that Venus is the nearest planet to the earth.

Besides two planets, i.e. Venus and Uranus all the planets revolve around the sun in the same direction and virtually the same plane. These differences are believed to stem from collisions that occurred late in the planets' formation. Therefore, the correct option is (c).

50. If a place is affected by Tide at 6:00 AM Monday, normally at what time the same place will be affected by Ebb?

(a) 6:26 PM Monday
(b) 6:52 AM Tuesday
(c) 12:13 PM Monday
(d) 00:26 AM Tuesday

Correct Answer: (c) 12:13 PM Monday

Solution:The lunar day consists of 24 hours and 50 minutes. Since the earth rotates through two tidal "bulges" every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the shore to go from high to low, or from low to high.

Hence, the ebb would be affected at 12:13 pm Monday. Therefore, the correct option is (c).

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CAPF (AC) 2016 (Paper-1) (Question 1-50)

41. Which one of the following statements is not true?

42. Which one of the following statements is correct?

43. A Barometer kept in an elevator reads 760 mm when the elevator is at rest. When the elevator moves in the upward direction with increasing speed, the reading of the Barometer will be:

44. Which one of the following statements is not correct?

45. Let a resistor having 4 ohm resistance be connected across the terminals of a 12 volt battery. Then the charge in coulomb passing through the resistor per second is :

46. Arrange the following varieties of silk in India in their order of decreasing production :

47. Which of the following are the objectives of the Khadi and Village Industries Commission?

48. Which of the following statements concerning circum-pacific belt are correct?

49. Which of the following statements relating to solar system is/are correct?

50. If a place is affected by Tide at 6:00 AM Monday, normally at what time the same place will be affected by Ebb?

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