ECAT Pre Engineering MCQ Test With Answer for Chapter 23 Mathematics

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ECAT Mathematics Chapter 23 Important MCQ's

Sr.#	Question	Answer
1	The vector k = [0,0,1] is called unit vector along:	A. x -axis B. y - axis C. z- axis D. None of these
2	If a≠ , b≠ 0 and|a=b|=|a-b|,then vectors a and b are:	A. Parallel to each other B. Perpendicular to each other C. Inclined at 60o D. neither parallel nor perpendicular
3	Vector i =	A. [1,0] B. [0,1,0] C. [0,0,1] D. None of these
4	If m and n be two scalars, then (m+n) g =	A. 0 B. m+n C. m▁a+n▁a D. ma - m▁a
5	If aand bare two vectors then a+b =	A. b + a B. b - a C. ab D. a^ b
6	The magnitude of vector a 2i-7j is	A. √23 B. √43 C. 3 D. √53
7	O (0,0)is called:	A. Position vector B. Free vector C. Unite vector D. Null vector
8	The angle between the vectors u = [-3 , 5] and v = [6 , -2] is:	A. π/2 B. -3π/2 C. π D. None of these
9	Vector additon is:	A. Commutative B. Associative C. Commutative and Associative D. None of these
10	If a,b = 0 then	A. a |b B. a||b C. a = b D. None