46.  One kilometre is equal to how many miles?

a

  0.5

b

 1.6

c

 0.62

d

 0.84

Answer & Explanation
Answer : Option C
Explanation :

47.  Rainbow is due to

a

  Absorption of sunlight in minute water droplets

b

 Refraction and reflection of sunlight by water droplets

c

 Diffusion of sunlight through water droplets

d

 Ionisation of water deposits

Answer & Explanation
Answer : Option B
Explanation :

48.  A watt meter can be connected to a high current circuit by using

a

  Shunt

b

 Current transformer

c

 Eddy current transformer

d

 Potential transformer

Answer & Explanation
Answer : Option B
Explanation :

49.  Of the following taxonomic category which is the most inclusive (i.e. is the highest in hierarchy)?

a

  Order

b

 Subspecies

c

 Genus

d

 Class

Answer & Explanation
Answer : Option D
Explanation :

50.  In which of the following pairs, the two substances forming the pair are chemically most dissimilar?

a

  Chalk and marble

b

 Charcoal and diamond

c

 Sugar and paper

d

 Butter and paraffin wax

Answer & Explanation
Answer : Option D
Explanation :

51.  Amalgams are

a

  Highly coloured alloys

b

 Alloys which have great resistance to abrasion

c

 Alloys which contain carbon

d

 Alloys which contain mercury as one of the contents

Answer & Explanation
Answer : Option D
Explanation :

52.  Primitive man first learnt

a

  To grow grain

b

 To make fire

c

 To tame animals

d

 To make a wheel

Answer & Explanation
Answer : Option B
Explanation :

53.  Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

a

  Depressed

b

 Will overflow

c

 Change its meniscus

d

 Will not rise

Answer & Explanation
Answer : Option D
Explanation :

54.  The inexpensive and commonly used variety of glass is called soda glass. It is called so because

a

  Is made using soda(sodium carbonate)

b

 Was used initially for making bottles of soda(carbonated drink)

c

 Was initially used for storing sodium carbonate

d

 Is made using soda lime

Answer & Explanation
Answer : Option A
Explanation :

55.  The most important ore of aluminium is

a

  Bauxite

b

 Calamine

c

 Calcite

d

 Galena

Answer & Explanation
Answer : Option A
Explanation :

56.  A 10 cm long conductor is linked with a magnetic field of 1 weber/sq. m. When a current of 10 A passes through it, it will experience a force of

a

  0.1 N

b

 10 N

c

 0.01 N

d

 1 N

Answer & Explanation
Answer : Option D
Explanation :

57.  The power factor at resonance in R-L-C parallel circuit is

a

  0.5 leading

b

 0.5 lagging

c

 Zero

d

 Unity

Answer & Explanation
Answer : Option D
Explanation :

58.  Railway tracks are banked on curves

a

  Necessary centripetal force may be obtained from the horizontal component of the weight of the train

b

 The train may not fly off in the opposite direction

c

 Necessary centrifugal force may be obtained from the horizontal component weight of the train

d

 To avoid frictional force between the tracks and wheels

Answer & Explanation
Answer : Option A
Explanation :

59.  Nautical mile is a unit of distance in

a

  Space

b

 Navigation

c

 None of these

d

 Aviation

Answer & Explanation
Answer : Option B
Explanation :

60.  Marsh gas is

a

  Nitrogen

b

 Methane

c

 Hydrogen

d

 Ethane

Answer & Explanation
Answer : Option B
Explanation :



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