Civil UPSC ESE Exam Solution 2021
UPSC ESE Exam Solution 2021 for Civil Engineering UPSC ESE 2021 GS Paper 1 download exam paper from telegram https://telegram.me/civil_experiences
A 7.5 cm diameter jet of water strikes a curved plate at its centre with a velocity of 20 m/s. The curved plate is moving with a velocity of 8 m/s in the direction of the jet. The jet is deflected through an angle of 65°. By assuming the plate as smooth, what is the angle made by the relative velocity at the outlet of the plate?
ANSWER= [C] 15°
Detailed Solution for Civil Engineering Exam
Since the jet is deflected by 165°, the relative velocity at the outlet will make an angle of 15° with the direction of plate movement. This is based on the assumption that for shockless exit, relative velocity should be tangential to the plate at the outlet.