The head loss due to sudden expansion is express by:
What is the formula to calculate the lead loss (hf) using Darey-Weisbach equation?
In case of large number of pipe fittings such as bends and elbows the minor losses neglected up to
Minor losses do not make any serious effect in:
Oil density 860kg/m3 has a kinematic viscosity of 40 stokes. Calculate the critical velocity when it flows in a pipe 50mm bore diameter.
An impulse turbine is
Identity the FALSE statement from the following, The specific speed of the pump increases with:
Euler number is defined as the ratio of inertia force to:
If α is the blade angle at the outlet, then the maximum hydraulic efficiency of an ideal impulse turbine is:
Which one of the following pumps is not a positive displacement pump?
Due to aging pipeline, its carrying capacity has decreased by 25%. The corresponding increase in the Darey Weisbach friction factor, f is______%.
Water is flowing through a 100mm diameter pipe with a velocity of 0.015m/sec. If The kinematic viscosity of water is 1.13 x 10-6m2/sec. The friction factor “f” of the pipe is:
The circular water pipes shown in the sketch are following. The velocity of flow (in m/s) in the branch pipe “R” is
Crude oil of kinematic viscosity 2.25 strokes flows through a 20 cm diameter pipe, the flow rate is 1.5 lit/sec. Find the type of flow.
A hydraulic turbine has a discharge of 5m3/sec, when operating under a head of 20m with a speed of 500rpm. If it is to operate under a head of 15m, for the same discharge, the rotational speed in rpm will approximately will be?
A horizontal jet of water with its cross-sectional area of 0.0028m2 hits a fixed vertical plate with a velocity of 5m/sec. After impact the jet splits symmetrically of the plate. Find the force of impact of the jet on the plate.
Match List-I with List-II and select the correct answer:
|
List-I |
List-II |
|
A. Pelton wheel (single jet) |
1. Medium discharge, low head |
|
B. Francis Turbine |
2. High discharge, low head |
|
C. Kaplan Turbine |
3. Medium discharge, medium head |
|
|
4. Low discharge, high head |
The speed ratio of a Pelton wheel operating under a head of 900 m is 0.45. What is the peripheral velocity of the turbine wheel?
A reaction turbine discharges 30 m3/s of water under a head of 10 m with an overall efficiency of 92%. The power developed is:
A centrifugal pump delivers water at the rate of 50 litres/s against a total head of 40 meter then the power required to drive the pump is:
Water is flowing through a 20 cm diameter pipe with friction factor, f = 0.04. The shear stress at a point 4 cm from the pipe axis is 0.0098 N/Cm2. Calculate the stress at the pipe wall.
A combined piping system consists of 1800m of 50cm, 1200m of 40cm and 600m of 30cm diameter pipes of the same material. Connected in series calculate the equivalent length of 40cm pipe of some material.
Lubricating Oil of specific gravity 0.84 and dynamic viscosity 0.140KN-Sm2 is pumped at a rate of 0.026m3/S through a 0.17m diameter 300m long horizontal pipe. Calculate the pressure drop in KN/m2.
A peloton wheel has a bucket speed of 12m/sec and is supplied with water at a rate of 750 liter/s under a head of 35m. If the bucket deflects the jet through an angle of 160o, find the horse power and the efficiency of the turbine. Neglecting friction in the bucket.
A turbine develops 8000KW when running at 1000rpm. The head of the turbine is 50m. If head is reduce to 20m, determine power develop by turbine.
