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Hydraulic machines
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure. varies as the square of the radial distance [other wrong options] [Discuss in forum] |
| Q2 ⇒ The density of a liquid in kg/m3 is numerically equal to its specific gravity. True [other wrong options] [Discuss in forum] |
| Q3 ⇒ The specific gravity of an oil whose specific weight is 7.85 kN/m3, is. 0.8 [other wrong options] [Discuss in forum] |
| Q4 ⇒ An average value of coefficient of velocity is. 0.97 [other wrong options] [Discuss in forum] |
| Q5 ⇒ The pressure of liquid at throat in a venturimeter is __________ than that at inlet. lower [other wrong options] [Discuss in forum] |
| Q6 ⇒ The pressure at a stagnation point is always low. Disagree [other wrong options] [Discuss in forum] |
| Q7 ⇒ The top of the weir over which the water flows is known as. sill or crest [other wrong options] [Discuss in forum] |
| Q8 ⇒ An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice. full [other wrong options] [Discuss in forum] |
| Q9 ⇒ When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface. concave [other wrong options] [Discuss in forum] |
| Q10 ⇒ A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called. streamline flow [other wrong options] [Discuss in forum] |
| Q11 ⇒ Select the wrong statement. The diameter of an equivalent pipe is equal to that of a compound pipe [other wrong options] [Discuss in forum] |
| Q12 ⇒ The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency. mechanical [other wrong options] [Discuss in forum] |
| Q13 ⇒ The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is. 82.4 r.p.m. [other wrong options] [Discuss in forum] |
| Q14 ⇒ The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet. No [other wrong options] [Discuss in forum] |
| Q15 ⇒ A hydraulic coupling belongs to the category of. energy transfer machines [other wrong options] [Discuss in forum] |
| Q16 ⇒ The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water. True [other wrong options] [Discuss in forum] |
| Q17 ⇒ In an inward flow reaction turbine the water enters the wheel at the outer periphery and then flows towards the centre of the wheel [other wrong options] [Discuss in forum] |
| Q18 ⇒ In a reciprocating pump, air vessels are used to. reduce acceleration head [other wrong options] [Discuss in forum] |
| Q19 ⇒ The power developed by a turbine is (where H = Head of water under which the turbine is working). directly proportional to H3/2 [other wrong options] [Discuss in forum] |
| Q20 ⇒ A hydraulic accumulator is a device used to store __________ energy which may be supplied to a machine later on. pressure [other wrong options] [Discuss in forum] |
| Or |