MECANISMO 2B

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0 [{"id":596138,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"En las bicicletas se emplean mucho el \"cambio de velocidad\" compuesto por varias ruedas en el eje del pedal (\u2026\u2026\u2026\u2026\u2026\u2026.) y varias en el de la rueda (pi\u00f1\u00f3n).","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596147,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Se emplea en m\u00e1quinas que necesitan varias velocidades de funcionamiento a partir de una \u00fanica velocidad del motor y es especialmente apreciado en los taladros sensitivos.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596137,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"El pie de la biela con el \u00e9mbolo. El giro de la manivela provoca el movimiento de la biela y, consecuentemente, el \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. lineal alternativo del \u00e9mbolo.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596144,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Hacia 1530 cuando apareci\u00f3 la \u2026\u2026\u2026\u2026... de pedal, m\u00e1s adelante este mismo sistema se aplic\u00f3 a piedras de afilar y mucho m\u00e1s tarde a m\u00e1quinas de coser. ","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596145,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Primero almacenamos la energ\u00eda en el resorte girando el \u2026\u2026\u2026\u2026\u2026\u2026. (normalmente mediante una mariposa que est\u00e1 unida a \u00e9l) en el sentido libre.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596139,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Las ruedas dentadas suelen ser una placa de \u2026\u2026\u2026\u2026\u2026. sin cubo (aunque tambi\u00e9n las hay de materiales pl\u00e1sticos).","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596134,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Tambi\u00e9n permite el proceso contrario: transformar un movimiento lineal alternativo del pie de biela en uno en giratorio continuo en el eje al que est\u00e1 conectada la exc\u00e9ntrica o la \u2026\u2026\u2026\u2026\u2026\u2026.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596148,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"La polea \u2026\u2026\u2026\u2026\u2026. es un cilindro (u otra polea de correa) que apoya sobre la correa y permite aumentar su tensi\u00f3n adecuadamente.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596136,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"La longitud del \u2026\u2026\u2026\u2026. de la manivela determina el movimiento del pie de la biela (Carrera=2 veces el radio de la manivela).","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596135,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Para el sistema exc\u00e9ntrica- biela se sustituye la manivela por una exc\u00e9ntrica, conectando la biela al eje exc\u00e9ntrico y siendo el resto del \u2026\u2026\u2026\u2026\u2026\u2026. semejante al anterior.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596143,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Permite obtener un movimiento giratorio continuo a partir de uno oscilante, o tambi\u00e9n, obtener un movimiento oscilante a partir de uno giratorio continuo. ","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596146,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Su utilidad: este mecanismo se emplea en: motores de autom\u00f3viles (para la apertura y cierre de las v\u00e1lvulas), ","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596141,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Siendo muy apreciado para conseguir movimientos lineales de precisi\u00f3n (caso de microscopios u otros instrumentos \u00f3pticos como retroproyectores).","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596142,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"Al engranaje de mayor tama\u00f1o se le denomina rueda y al de menor pi\u00f1\u00f3n. Los dientes son dise\u00f1ados para permitir la rotaci\u00f3n uniforme (sin saltos) del eje conducido.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":596140,"quiz_id":"29190","answer_id":null,"answerType_id":"0","created_at":"2018-10-19 03:34:40","updated_at":"2018-10-19 03:34:40","questionName":"El sistema suele complementarse con un \u00e9mbolo para guiar mejor el movimiento alternativo del pie de biela. En los \u2026\u2026\u2026\u2026\u2026... de combusti\u00f3n interna el propio \u00e9mbolo hace de pist\u00f3n.","questionTimeSeconds":"40","questionTimeMinutes":"0","questionImagePath":null,"position":null,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null}]
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En las bicicletas se emplean mucho el "cambio de velocidad" compuesto por varias ruedas en el eje del pedal (……………….) y varias en el de la rueda (piñón).

Select the correct answer(s).  

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