Which material is generally used in valve springs?
A. Carbon steel
B. Chromium-vanadium steel
C. Nickel-chromium steel
D. Both carbon steel or chromium-vanadium steel
Answer:D
Which material is generally used in valve springs?
A. Carbon steel B. Chromium-vanadium steel C. Nickel-chromium steel D. Both carbon steel or chromium-vanadium steel