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Mathematics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
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Question # 2
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0
1
-1
2
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Question # 3
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n!
0!
1
None of these
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Question # 4
A circle passing through the vertices of any triangle is called ______
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In circle
Circum circle
Escribed circle
None of these
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Question # 5
The transport of a null matrix is
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Row matrix
Column matrix
Square matrix
Null matrix
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Question # 6
The equation x
2
+ y
2
= 0 represents
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A circle
A degenerate circle
An empty set
A st. line
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Question # 7
Period of 3 sin x is ______
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Question # 8
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Question # 9
x = sin
-1
3, then the value of sin x is
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√(3/2)
3
Not possible
-1
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Question # 10
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1
0
3
-1
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Question # 11
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Question # 12
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Question # 13
Matrices A = [aij] 2 x 3 and B = [bij] 3 x 2 are suitable for
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BA
A2
AB
B2
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Question # 14
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Question # 15
If the roots of ax
2
+ b = 0 are real and distinct then
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ab > 0
a = 0
ab < 0
a > 0, b > 0
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Question # 16
A person standing on the bank of a river finds that the angle of elevation of the top of a tower on the opposite bank is 45°. then which of the following statements is correct?
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Breadth of the river is twice the height of the tower
Breadth of the river an the height of the tower are the same
Breadth of the river is half of the height of the tower
None of these
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Question # 17
If y = sin (ax + b), then fourth derivative of y with respect to x =
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a
4
cos (ax + b)
a
4
sin (ax + b)
-a
4
sin (ax + b)
a
4
tan (ax + b)
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Question # 18
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Question # 19
An equation which holds good for all values of variables is called
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Equation
Conditional equation
Constant
None
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Question # 20
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A = x, B = 1
A = 0, B = 2
A = -1, B = 1
A = x-1, B = x+1
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Question # 21
The distance of the point (a, b) from x-axis is
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a
b
a + b
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Question # 22
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Question # 23
If for the matrix A,A5 = 1,then A-1=
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A2
A3
A
None of above
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Question # 24
If A is skew Hermitian Matrix then which of the following is not skew Hermitian matrix
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A2
A5
A3
A7
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Question # 25
Additive inverse of -a -b is
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a
-a + b
a - b
a + b
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Question # 26
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Question # 27
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A finite set
An infinite set
An empty set
None of these
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Question # 28
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Question # 29
If n(X) = 18, n(X∩Y) = 7, n(X∪ Y) = 40 then n(Y) =
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1
12
5
29
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Question # 30
Point (2,0) lies on trigonometric function f(x)=______;
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sinx
cosx
tanx
secx
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Question # 31
If a force F = 2i + j +3k acts at point (1,-2,2) of a body then the moment of F about a pint lying on the line of action of the force is
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5
Equal to the moment of the force about origin
0
Cannot be found
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