Answer :
Final answer:
The correct answer is (b) 0.002 inch. The maximum dial indicator reading of 0.004 inch indicates that the valve guide clearance is half that value, which is 0.002 inch.
Explanation:
The correct answer is (b) 0.002 inch. When utilizing a dial indicator to measure valve-to-guide clearance and the maximum value indicated is 0.004 inch, it implies that the maximum clearance is double the maximum indicator reading, because the dial measures the total movement from one side to the other.
In this case, as the maximum dial indicator reading is 0.004 inch, the valve guide clearance is 0.002 inch. This is because the dial indicator would have moved 0.002 inch in either direction from the central position to reach the maximum lateral movement, thus showing half of the total clearance value.
