Curves & Epicycloids

9) When the section plane is inclined to the axis and is parallel to one of the generators the section is a .........
a) Ellipse                               
b) Parabola 
c) Hyperbola                         
d) Cycloid

10) Use of elliptical curve is........
a) Arches                            
b) Dams and monuments
c) Manholes, gland & stuffing boxes
d) All of these

11) Use of parabolic curve is.........
a) Bridges & arches           
b) Sound reflectors
c) Light reflectors                  
d) All of these

12) Use of hyperbolical curve is...... 
a) Cooling towers and water channel
b) Dames
c) Bridges
d) All of these

13) When the point is within the circle, the curve is called an.......
a) Superior trochoid                
b) Interior trochoid
c) Trochoid                                
d) Isotrochoid

14) When the point outside the circle then the curve is called as......
a) Interior trochoid                   
b) Superior trochoid
c) Trochoid                                  
d) Insuperior trochoid

15) The curve general by a point on a circumference of a circle, which rolls without slipping along another circle it is called.......
a) Epicycloids                          
b) Hypocycloid
c) Involute                               
d) None of these

16) When the circle rolls inside another circle the curve is called.......
a) Hypocycloid                        
b) Epicycloids
c) Trochoid                               
d) Hypotrochoid

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