Question

question 8

1. reducing power suddenly from a high power setting, cooling the cylinder too rapidly can cause

d. a and b
a. thermal shock
b. cracked exhaust ports
c. reactive shock

Explanation:

Sudden rapid cooling of an engine cylinder from a high power setting first causes thermal shock, which is the stress from extreme temperature change. This thermal shock can then lead to cracked exhaust ports as the metal fails under the stress. Reactive shock is not a relevant term here.

Answer:

d. A and B