Engine Repair (A1)Câu 12 / 120
Head bolts that use a torque-to-yield (TTY) design should be:
a.Reused indefinitely
b.Torqued to half the final value only
c.Replaced with new bolts during reassembly
d.Coated with anti-seize before reuse
Giải thích
Torque-to-yield bolts are stretched into their plastic range for a uniform clamp load and should not be reused. Reusing them risks uneven clamping and gasket failure. Always follow the specified torque-plus-angle sequence with new bolts.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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