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ISRO Technician-B Plumber 2019
68

ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

68) Dissolved impurity in water

Mg

Clay

Bacteria

None of these

Answer is:

Mg

ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

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Related ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

69) Temporary hardness in water is due to

Calcium Carbonate

Calcium Sulphate

Ferrous hydroxide

None of these

Answer is:

Calcium Carbonate

70) How much time will it take for an amount of Rs.450 to yield Rs.81 as interest at 4.5% per annum of simple interest?

3.5 yrs

4 yrs

4.5 yrs

5 yrs

Answer is:

4 yrs

71) Water seal of traps in the house drainage is preserved by

Gradient

Anti-Siphonage

Vent pipe

None of these

Answer is:

Anti-Siphonage

72) "3:1" scale represents

Diagonal scale

Full size scale

Enlarged scale

Reduced scale

Answer is:

Reduced scale

ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

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