If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm2, the pressure at a depth of 2.5 m, is

1 metre of water

2 metres of water

3 metres of water

3.5 metres of water

Correct Answer : 3 metres of water

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An orifice is taken as large if

(H₂ - H₁) > H

(H₂ - H₁) > H/2

(H₂ - H₁) > H/4

(H₂ - H₁) > H/3

Correct Answer : Option (D) : (H₂ - H₁) > H/3

A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m3) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is

459 kg

549 kg

945 kg

954 kg

Correct Answer : Option (D) : 954 kg

An error of 1% in measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to

1.5%

2.0%

2.5%

4.5%

Correct Answer : Option (C) : 2.5%

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