Hydraulic Machines Multiple Choice Questions and Answers


46. According to fan laws,for fans having constant wheel diameter, the pressure varies .......


   A.Directly as a fan speed

   B.Square of fan speed

   C.Cube of fan speed

   D.Square root of fans speed

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B.Square of fan speed

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47. According to fan laws,for fans having constant wheel diameter, the air or gas capacity varies .......


   A.directly as a fan speed

   B.square of fan speed

   C.cube of fan speed

   D.square root of fans speed


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A.directly as a fan speed

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48. According to fan laws,for fans having constant wheel diameter, the power demand varies .........


   A.Directly as a fan speed

   B.Square of fan speed

   C.Cube of fan speed

   D.Square root of fans speed


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C.cube of fan speed

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49. According to fan laws, at constant speed and capacity,the pressure and power very......


   A.Directly as the air or gas density

   B.Inversely as square root of density

   C.Inversely as density

   D.As square of density


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A.Directly as the air or gas density

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50. According to fan laws, at constant pressure,the speed capacity and power vary......


   A.Directly as the air or gas density

   B.Inversely as square root of density

   C.Inversely as density

   D.As square of density

✔ View Answer


B.inversely as square root of density

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