Q3. What is "virtual tappet" in the hydraulically actuated air spring return exhaust valves, and how is it set. Explain why the damage occurs to the seats of the exhaust valves due to furrowing and cutting. How an incident of "valve drop" leading to extensive damage to running gear can occur.
Q8. a) Draw sectional diagram of exhaust valve of 2-stroke Diesel Engine. Name the different components of the valve. (8)
b) Describe working of the valve in operation. How valve rotation occurs during operation and its purpose. (6)
c) What is the special material used on valve lid. (2)
Username or email address *Required
Password *Required
Note: Entering wrong username in the login form will ban your IP address immediately. Entering wrong password multiple times will also ban your IP address temporarily.
Log in
Lost your password? Remember me
No account yet?
