Question

there are two common types of electric egr valves: the pulse - width - modulated solenoid type and the _______ motor egr valve type.

a. diaphragm
b. hopper
c. stepper
d. control

Explanation:

Electric EGR (Exhaust Gas Recirculation) valves are components in automotive engines. The two common types are the pulse - width - modulated solenoid type and the stepper motor type. A stepper motor can precisely control the position of the EGR valve, allowing for accurate regulation of the amount of exhaust gas recirculated. Diaphragm is more related to other types of valves (like vacuum - operated diaphragm valves in some non - electric systems), hopper is a container - like structure (not a valve type here), and control is too general.

Answer:

C. Stepper