# A turbine discharging 10m3/s is to be designed so that a toque of 1600kg-m is to exerted on the impeller turning at 200 rpm under the condition that the existing liquid exerts no moment in spite of its momentum. The tangential component of the velocity at the outer periphery of the impeller of radius 1.0 m is:

1.  0.98 m/s

2.  1.57 m/s

3.  2.10 m/s

4.  2.26 m/s

4

1.57 m/s

Explanation :
No Explanation available for this question

# Given below are two lists. Which of these are properly matched (Types of Pump) (Head Discharge performance) 1. Propeller pump: Large discharges and low heads with negligible 2. Single stage centrifugal pump with backward curved blades: Medium heads, with decreasing head as discharge increases 3. Turbine pump: Medium to high heads with low, but constant, percentage variation in head discharges

1.  1 & 2

2.  2 & 3

3.  2 only

4.  3 only

4

1 & 2

Explanation :
No Explanation available for this question

# Consider the following statements: 1. The specific speed for turbines is directly proportional to H5/4 2. The specific speed for turbines is inversely proportional to H5/4 3. The specific speed for pumps is directly proportional to H3/4 4. The specific speed for pumps is inversely proportional to H3/4 Which of these statements are correct

1.  1 & 3

2.  2 & 4

3.  1 & 4

4.  2 & 3

4

2 & 4

Explanation :
No Explanation available for this question

# Consider the following statements: Air vessels are fitted on the suction and delivery sides of a reciprocating pump to 1. Achieve higher speed without separation. 2. Reduce work in overcoming frictional resistance. 3. Avoid excessive vibration permanently. 4. Have nearly uniform discharge. Which of these statements are corrects

1.  1, 2 & 4 only

2.  1, 2 & 3 only

3.  2, 3 & 4 only

4.  1, 2, 3 & 4

4

1, 2, 3 & 4

Explanation :
No Explanation available for this question

# The velocity of pressure wave in water of infinite extent is 1414 m/s. The velocity of propagation of water hammer pressure in a pipe carrying water and having diameter =40 cm, pipe thickness = 4 mm, with E (Modulus of elasticity) of the pipe material = 2.1x 1011 Pa, K (Bulk modulus of water) = 2.1 x 109 Pa, is

1.  1410 m/s

2.  2000 m/s

3.  1000 m/s

4.  700 m/s

4

1000 m/s

Explanation :
No Explanation available for this question

# Let C1 be the velocity of pressure wave traveling along rigid pipe carrying water with its bulk modulus 2.16 x 109 N/2. Let C2 be the velocity of pressure wave travelling along a rigid pipe carrying oil of relative density 0.600 with its bulk modulus as 1.296 x 109 N/m2 through a similar pipe. What will be the ratio C1/C2

1.  0.01

2.  0.1

3.  1.0

4.  10.0

4

1.0

Explanation :
No Explanation available for this question

# The pipes A, B and C have the following basic geometries: Pipe A B C Diameter D D/2 2D Length L L 4L If these pipes are connected in series, by assuming the value of friction factor f to be same for all the three pipes and the equivalent pipe, this set of pipes in series in equivalent to a pipe of length Le and diameter D and friction factor f with the equivalent length Le being equal to

1.  5 1/8 L

2.  4 1/8  L

3.  26 1/8 L

4.  33 1/8 L

4

33 1/8 L

Explanation :
No Explanation available for this question

# Consider the following statements in respect of steady laminar flow through a circular pipe: 1. Shear stress is zero on the central axis of the pipe 2. Discharge varies directly with the viscosity of the fluid 3. Velocity is Maximum at the center of the pipe. 4. Hydraulic gradient varies as the square of the mean velocity of flow. Which of these statements are correct

1.  1, 2, 3 & 4

2.  1 & 3 only

3.  2 & 4 only

4.  3 & 4 only

4

1 & 3 only

Explanation :
No Explanation available for this question

# The pressure drop in a 30 cm diameter horizontal pipe is 60kPa in distance of 15m. The wall shear stress in kPa is

1.  0.1

2.  0.2

3.  0.3

4.  0.4

4

0.3

Explanation :
No Explanation available for this question

1.  1, 2, 3 & 4

2.  1 & 4 only

3.  2 & 3 only

4.  3 & 4 only

4