RRB Group D 2018-6-12-2018-2 RRB Question Paper

RRB Group D 2018 Question Papers

RRB Group D 2018-6-12-2018-2 RRB Questions

41.

Calculate the relative molecular mass of CO 2 .

A.

46 u

B.

44 u

C.

40 u

D.

45 u

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ANSWER :

B. 44 u

42.
______ controls involuntary activities like coughing and sneezing.
A.
Medulla
B.
Cerebrum
C.
Pons
D.
Cerebellum
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ANSWER :
A. Medulla
43.
The ratio of the present ages of X and Y is 3 : 8 while the ratio of the present ages of Y and Z is 4 : 5. Two years ago the age ratio of X and Y was 1 : 3. What is the sum of the present ages of the three?
A.
126 years
B.
105 years
C.
63 years
D.
84 years
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ANSWER :
D. 84 years
44.

The numerical value of the area of a square is equal to half the numerical value of each of its diagonals. What is the numerical value of diagonal?

A.

\(\frac{\sqrt{2}}{2}\)

B.

\(\sqrt{2}\)

C.

1

D.

2

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ANSWER :

C. 1

45.
This compound is sometimes added to the food for quick cooking. It is a mild non-corrosive alkali. The reaction given below shows the action of its formation. Name this compound.
NaCI + H 2O +C 0 2NH 3=?
A.
Sodium Hydrogen Carbonate
B.
Ammonium Carbonate
C.
Sodium Carbonate
D.
Ammonium Chloride
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ANSWER :
A. Sodium Hydrogen Carbonate
46.
The length of the diagonals of a rhombus is 16 cm and 12 cm. What is the perimeter of the rhombus?
A.
56 cm
B.
28 cm
C.
26 cm
D.
40 cm
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ANSWER :
D. 40 cm
47.

The chemical formula of Quick Lime (Kalichuna) is ______.

A.

CaCO 3

B.

CaCI 2

C.

Ca(OH) 2

D.

CaO

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ANSWER :

D. CaO

48.
Which figure will fill in the blanks and complete the series correctly?
< ≪ ≪ > ____
A.
><<
B.
<>
C.
>>>
D.
>>
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ANSWER :
D. >>
49.
Which of the following statements is not correct regarding matter?
A.
Matter is made up of particles.
B.
There is a difference between particles of matter
C.
There is no attraction force between particles of matter
D.
The particles of matter move continuously in fluid and air.
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ANSWER :
C. There is no attraction force between particles of matter
50.
In the formula M = h i / h o , what do m, h iand h o represent?
A.
M – Mass, h i– Height of reflection, h o- Height of object
B.
M – Magnification, h i– Height of object, h o- Height of reflection
C.
M – Magnification, h i – Height of reflection, h o - Height of object
D.
M – Mass, h i –Height of object, h o - Height of reflection
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ANSWER :
C. M – Magnification, h i – Height of reflection, h o - Height of object