CDS Exam (II)- 2017 - General Knowledge Defence Question Paper

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CDS Exam (II)- 2017 - General Knowledge

CDS Exam (II)- 2017 - General Knowledge Defence Questions

11.
An electron and a proton starting from rest are accelerated through a potential difference of 1000 V. Which one of the following statements in this regard is correct?
A.
The kinetic energy of both the particles will be different.
B.
The speed of the electron will be higher than that of the proton.
C.
The speed of the proton will be higher than that of the electron.
D.
The speed of the electron and the proton will be equal.
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ANSWER :
B. The speed of the electron will be higher than that of the proton.
12.
Two wires are made having same length \( l \) and area of cross-section A. Wire 1 is made of copper and wire 2 is made of aluminium. It is given that the electrical conductivity of copper is more than that of aluminium. In this context, which one of the following statements is correct?
A.
The resistance of wire 1 will be higher than that of wire 2.
B.
The resistance of wire 2 will be higher than that of wire 1.
C.
The resistance of both the wires will be the same.
D.
If same current is flown through both the wires, the power dissipated in both the wires will be the same.
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ANSWER :
B. The resistance of wire 2 will be higher than that of wire 1.
13.
A ray of light is incident on a plane mirror at an angle of \( 40^{\circ} \) with respect to surface normal. When it gets reflected from the mirror, it undergoes a deviation of
A.
\( 40^{\circ} \)
B.
\( 100^{\circ} \)
C.
\( 90^{\circ} \)
D.
\( 80^{\circ} \)
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ANSWER :
B. \( 100^{\circ} \)
14.
Infrared, visible and ultraviolet radiations/light have different properties. Which one of the following statements related to these radiations/light is not correct?
A.
The wavelength of infrared is more than that of ultraviolet radiation.
B.
The wavelength of ultraviolet is smaller than that of visible light.
C.
The photon energy of visible light is more than that of infrared light.
D.
The photon energy of ultraviolet is lesser than that of visible light.
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ANSWER :
D. The photon energy of ultraviolet is lesser than that of visible light.
15.
After using for some time, big transformers get heated up. This is due to the fact that
1. current produces heat in the transformers
2. hysteresis loss occurs in the transformers
3. liquid used for cooling gets heated
Select the correct answer using the code given below.
A.
1 only
B.
2 and 3 only
C.
1 and 2 only
D.
1, 2 and 3
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ANSWER :
C. 1 and 2 only
16.
A person is standing on a frictionless horizontal ground. How can he move by a certain distance on this ground?
A.
By sneezing
B.
By jumping
C.
By running
D.
By rolling
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ANSWER :
A. By sneezing
17.
In the reaction between hydrogen sulphate ion and water
\( HSO_{4}^{-} + H_{2}O \rightarrow H_{3}O^{+} + SO_{4}^{2-} \)
the water acts as
A.
an acid
B.
a base
C.
a salt
D.
an inert medium
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ANSWER :
B. a base
18.
How many hydrogen atoms are contained in 1.50 g of glucose \( (C_{6}H_{12}O_{6}) \)?
A.
\( 3.01 \times 10^{22} \)
B.
\( 1.20 \times 10^{23} \)
C.
\( 2.40 \times 10^{23} \)
D.
\( 6.02 \times 10^{22} \)
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ANSWER :
D. \( 6.02 \times 10^{22} \)
19.
The paste of a white material in water is used to maintain a fractured bone fixed in place. The white material used is called
A.
bleaching powder
B.
plaster of Paris
C.
powder of zinc oxide
D.
lime powder
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ANSWER :
B. plaster of Paris
20.
Which one of the following types of glasses is used for making optical instruments?
A.
Pyrex glass
B.
Soft glass
C.
Hard glass
D.
Flint glass
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ANSWER :
D. Flint glass
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