diff --git a/vds-app/App/screens/QuizIndex.js b/vds-app/App/screens/QuizIndex.js
index 5381b4e..ac00a15 100644
--- a/vds-app/App/screens/QuizIndex.js
+++ b/vds-app/App/screens/QuizIndex.js
@@ -84,7 +84,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.aerodynamics,
-                  questions: aerodynamicsQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? aerodynamicsQuestions.filter(item => !item.delta) : aerodynamicsQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -94,7 +94,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.first_aid,
-                  questions: firstAidQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? firstAidQuestions.filter(item => !item.delta) : firstAidQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -104,7 +104,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.flight_safety,
-                  questions: flightSafetyQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? flightSafetyQuestions.filter(item => !item.delta) : flightSafetyQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -114,7 +114,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.instruments,
-                  questions: instrumentsQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? instrumentsQuestions.filter(item => !item.delta) : instrumentsQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -124,7 +124,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.legislation,
-                  questions: legislationQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? legislationQuestions.filter(item => !item.delta) : legislationQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -134,7 +134,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.materials,
-                  questions: materialsQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? materialsQuestions.filter(item => !item.delta) : materialsQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -144,7 +144,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.meteorology,
-                  questions: meteorologyQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? meteorologyQuestions.filter(item => !item.delta) : meteorologyQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -154,7 +154,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.physiopathology,
-                  questions: physiopathologyQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? physiopathologyQuestions.filter(item => !item.delta) : physiopathologyQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })
@@ -164,7 +164,7 @@ class QuizIndex extends React.Component {
               textColor={colors.white} onPress={()=>
                 this.props.navigation.navigate("Quiz", {
                   title: texts.piloting_techniques,
-                  questions: pilotingTechniquesQuestions.filter(item => !item.delta),
+                  questions: this.state.excludeDelta ? pilotingTechniquesQuestions.filter(item => !item.delta) : pilotingTechniquesQuestions,
                   randomQuestions: this.state.randomQuestions,
                   color: colors.blue
                 })