In a railway track, two rails are joined end to end with a gap tin between them because...? Mcqs

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In a railway track, two rails are joined end to end with a gap tin between them because...?

(A) Steel can be saved
(B) Accidents due to contraction in winter can be avoided

(C) Air gaps are necessary for bearing the weight of running train
(D) Accidents due to expansion in summer can be avoided

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Internal friction of fluid is called_________...?

(A) Viscosity
(B) Surface tension

(C) Resistance
(D) Cohesive force

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Which natural element has the highest melting point...?

(A) Iron
(B) Tungsten

(C) Copper
(D) Silver

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Water vapour turns into clouds in the atmosphere when:...?

(A) It rains
(B) The temperature rise

(C) Dew point is reached
(D) Evaporation takes place

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Serum if blood plasma minus its...?

(A) Calcium ions
(B) Clotting proteins

(C) Globulins
(D) none

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We could destroy the Dengue Mosquito by introducing a special Mosquito Eating ______in the water bodies....?

(A) Fish
(B) Meat

(C) Chicken
(D) None

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Cotyledons are very Important because they ________...?

(A) Store Food
(B) Store Water

(C) Store Air
(D) None of these

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What percentage of plasma is composed of water...?

(A) 70%
(B) 80%

(C) 90%
(D) 92%

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Which one of the following is Barium...?

(A) Bi
(B) Be

(C) Ba
(D) Br

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In the absence of sunlight, the entire food chain would become...?

(A) Active and Thrive
(B) Unaffected and Stable

(C) Slow but Survive
(D) Inactive and Collapse

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