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Mathematics ECAT Pre Engineering Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
The direction cosines of y-axis are
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1, 0, 0
0, 1, 0
0, 0, 1
1, 1, 1
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Question # 2
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Question # 3
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Question # 4
The angle between the vectors 3i + j - k and 2i - j + k is
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Question # 5
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direction ratios
direction cosines
direction angles
none of these
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Question # 6
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none of these
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Question # 7
A vector with magnitude one is called
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constant vector
unit vector
zero vector
null vector
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Question # 8
If a,b,c are three non-coplanar vector then [a +b,b +c,c +a] = _____
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[a.b.c]
2[a,b,c]
[abc]-2
2[abc]2
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Question # 9
The number z so that the triangle with vertices A(1,-1,0),B(-2,2,1)and C(0,2,z) is a right triangle with right angle at vertex C
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1,2
-1,-2
2,-1
-2,1
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Question # 10
Which of the following is a scalar.
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force
frequency
weight
acceleration
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Question # 11
Which of the following is a vector
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length
momentum
volume
speed
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Question # 12
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Question # 13
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Question # 14
Which of the following is a scalar
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weight
force
speed
momentum
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Question # 15
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none of these
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Question # 16
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Question # 17
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[0, 0, 0]
[1, 0, 0]
[0, 1, 0]
[0, 0, 1]
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Question # 18
The area of the rhombus whose vertices are A(0,0),B(2,1),C(3,3),D(1,2) is
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36 square units
3 square units
6 square units
18 square units
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Question # 19
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Question # 20
The ortho center of triangle whose vertices are (0,0)(3,0)(0,4) is
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(0,0)
(1,1)
(2,2)
(3,3)
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Question # 21
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0
1
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Question # 22
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Question # 23
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Question # 24
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Question # 25
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Question # 26
Three points whose position vector a,b,c are collinear
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axb +b x c+ c x a = 0
a,b +b,c +c,a =0
a,|a xc| =0
a+b+c =0
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Question # 27
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1
0
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Question # 28
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Question # 29
The unit vector along z-axis is
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none of these
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Question # 30
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Question # 31
Unit vector in the positive direction of x-axis is
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