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PG TRB Maths Model Question Paper Free Download

TRB Model Questions
 
5. In a hyperbola the distance between foci is 20 and the distance between directrices is 10. The eccentricity of the hyperbola is
 
  • A. 2
  • B. 3
  • C. √2
  • D. √3
Answer: C.
√2
 
6. A system of equations is said to be consistent if they have
 
  • A. solution
  • B. no solution
  • C. both the above two
  • D. not known
Answer: A.
solution
 
 
7. In a parabola, the polar of the focus is
 
  • A. a line perpendicular to directrix
  • B. a line parallel to directrix
  • C. the directrix
  • D. none of these
Answer: C.
the directrix
 
8. A system of coplanar forces reduce
 
  • A. either to a single force or to a couple
  • B. to a couple
  • C. to a single force
  • D. none of the above
Answer: A.
either to a single force or to a couple