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Which of the following heart valves are mechanical valves? i. Ball Valve ii. Autograft Valve iii. Xenograft Valve iv. Single Leaflet Valve v. Homograft Valve vi. Bi leaflet Valves
A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is
In a compound weighing 1200 gm, metals A and B are in the ratio 5 : 7 and in another compound weighing 800 gm, metals A and B are in the ratio 3 : 1. Find the difference between weight of metal A and metal B in the third compound which is the mixture of compound 1 and compound 2.
For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is
Which of the figures shown in the options is an F-head engine as per valve arrangement (SV is suction valve, whereas EV is Exhaust valve)?
Two pipes M and N can fill a tank in 30 minutes and 35 minutes respectively and a valve A can empty that tank in 70 minutes. All of the three start their work and after sometime valve has been closed. If total time taken to fill the tank from the beginning is 18 minutes, find after how many minutes valve was closed?
A valve clearance of about 0.3 mm is usually given to ensure that the valve closes fully. What is tappet clearance in an overhead valve engine?
Though a needle valve is similar to a gate valve in design and operation it can be used as a throttling valve.
If due attention is not given to the valve size, valve timing and valve flow coefficients there may be a substantial loss with the increase in engine speed.
The flow capacity of a valve is calculated by the _________ Cv, the flow of water through a wide—open valve in U.S. gal/min for a pressure gradient of 1 psi. For a given nominal valve size the highest Cv is achieved with ball valves followed by (in decreasing order) gate, plug, and globe valves.