040307
Practice
Mock
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Engine Systems
Combustion, fuel, ignition, cooling, lubrication.
Q 1 / 50
engine-systems
L2
Which statement best describes a piezoelectric injector compared with a conventional solenoid injector?
A
Piezo injectors take no electrical input — they are driven mechanically by a dedicated camshaft lobe
B
Piezo injectors use a crystal stack that changes length under voltage for very fast, precise opening
C
Piezo injectors lift the needle slowly off its seat using a low-current magnetic solenoid coil
D
Piezo injectors are strictly low-pressure devices used only on petrol port-injection systems today
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