[{"id":155287,"question":"A massive object falls through a fluid:","choices":[{"text":"Faster","value":"A"},{"text":"Slower","value":"B"},{"text":"Slowest","value":"C"},{"text":"None","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155286,"question":"High speed meteors rushing through air reduces to ashes because of:","choices":[{"text":"Force of gravity","value":"A"},{"text":"High resistance of air","value":"B"},{"text":"Drag force","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155285,"question":"Stock's law holds for:","choices":[{"text":"Motion through free space","value":"A"},{"text":"Motion through viscous medium","value":"B"},{"text":"Bodies of all shapes","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155284,"question":"Viscosity of water is ______ that of air but ___ that of plasma.","choices":[{"text":"More, more","value":"A"},{"text":"Less, more","value":"B"},{"text":"Less, less","value":"C"},{"text":"More, less","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155283,"question":"Fluid friction is _____ the friction between two solid surfaces:","choices":[{"text":"Greater than","value":"A"},{"text":"Smaller than","value":"B"},{"text":"Equal to","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155282,"question":"Density of fluid is defined as:","choices":[{"text":"Its volume to mass ratio","value":"A"},{"text":"Product of volume and mass","value":"B"},{"text":"Its mass of volume ratio","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155281,"question":"Unit of viscosity is:","choices":[{"text":"Kg m<sup>-1</sup>sec<sup>-1</sup>","value":"A"},{"text":"N s m<sup>-2</sup>","value":"B"},{"text":"J s m<sup>-3</sup>","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155280,"question":"Glycerin has viscosity _____ the viscosity of water:","choices":[{"text":"More than","value":"A"},{"text":"Equal to","value":"B"},{"text":"Less than","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155279,"question":"A body is moving through a viscous medium eventually comes to rest because of:","choices":[{"text":"Force of gravity","value":"A"},{"text":"Force of friction","value":"B"},{"text":"Its weight","value":"C"},{"text":"Both A and C","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155278,"question":"N s m<sup>-2</sup>is unit of:","choices":[{"text":"Drag force","value":"A"},{"text":"Pressure","value":"B"},{"text":"Surface tension","value":"C"},{"text":"Coefficient of viscosity","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155277,"question":"Machine parts are jammed due to:","choices":[{"text":"Increasing in viscosity of lubricant","value":"A"},{"text":"Decreasing in viscosity of lubricant","value":"B"},{"text":"Decreasing in surface tension of lubricant","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155276,"question":"The body passing a viscous medium affected by:","choices":[{"text":"One force only","value":"A"},{"text":"Two forces only","value":"B"},{"text":"Four forces","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155275,"question":"The resistance offered by a fluid to a solid moving inside it is called:","choices":[{"text":"Drag force","value":"A"},{"text":"Surface force","value":"B"},{"text":"Viscosity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155274,"question":"The property of fluids due to which they resist their own flow is called:","choices":[{"text":"Drag force","value":"A"},{"text":"Surface tension","value":"B"},{"text":"Viscosity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":122018,"question":"A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is","choices":[{"text":"50 m/s","value":"A"},{"text":"20 m/s","value":"B"},{"text":"40 cm/s","value":"C"},{"text":"5 cm/s","value":"D"},{"value":"E"}],"correctAnswer":1}]