Hover or tap underlined Spanish terms to see their translation and exam tip.
El efecto de la presión lateral de las palas de una hélice, en una embarcación parada y sin arrancada, se debe principalmente a:Blade side pressure on a stopped boat with no way on is mainly due to:
Show the answer
Correct answer: b) The pressure difference between the blades.
Why it is correct
The lower blades work in denser water at higher pressure than the upper ones. That difference between blades pushes the stern sideways.
Why the others are not
- a) That gives thrust, not side effect.
- c) It sets the direction, not the cause.
- d) It sets the direction, not the cause.
How to work it out in the exam
- Lower blades push harder.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2022 · Convocatoria de abril · PER Test 3 · question 28 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2022 · Convocatoria de abril · PER Test 4 · question 29 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.