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Online Tests

Mathematics ECAT Pre Engineering Online Test MCQs With Answers

Question # 1

The largest possible domain of the function:

y=√(x ) is:

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(0 ,∞)

12

(3 , 12)

( 3 ,∞)

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Question # 2

The multiplicative inverse of 2/3 is

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3/2

-2/3

-3/2

1

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Question # 3

The general solution of tan 3x = 1 is

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Question # 4

y=-a is the equation of the directrix of

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y2 =4ax

x2=-4ay

x2=4ay

y2=-4ax

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Question # 5

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Question # 6

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Question # 7

In triangle ABC, in which b=95, c=34, a =52^𝜊then the value of a=

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18 cm

18.027 cm

20.7 cm

19 cm

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Question # 8

The line through the intersection of the lines x+ 2y+ 3= 0 : 3x +4y +7 =0 and making equal intercepts on the axes is

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x+ y+ 1= 0

x+ y- 2= 0

x+ y+ 2= 0

2x +y +2 =0

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Question # 9

Find the sum of the infinite geometric series 2 + 1 + 0.5 + ....

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3.5

3

4

None of these

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Question # 10

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Question # 11

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x³

3x²

3x

3

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Question # 12

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Question # 13

The square matrix A is skew Hermitian when (A)'=

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A

A'

-A

A

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Question # 14

A rule or correspondence that assigns to each element x in X a unique element y in Y is called a function from

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X to X

X to Y

Y to X

none of these

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Question # 15

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The law of consines

The law of sines

The law of tangents

None of these

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Question # 16

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30°

60°

45°

None of these

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Question # 17

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0

-2

1

4

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Question # 18

5 unbiased coins coins are tossed simultaneously. The probability of getting at least one head is

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1 / 32

31 / 32

1 / 16

None of these

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Question # 19

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Diagonal matrix

Scalar matrix

Triangular matrix

Identity matrix

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Question # 20

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Question # 21

The third term of the sequence a_n= (-1)^n-1(n-7) is ______

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8

4

-4

8

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Question # 22

The general equation of a circle is

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Question # 23

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x^-2+ c

not possible

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Question # 24

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Question # 25

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Question # 26

The axis of the parabola y²= 4ax is

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X = 0

Y = 0

X = y

X = -y

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Question # 27

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Question # 28

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Question # 29

The value of x and y when (x + iy)2 = 5 - 4i

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x = 2, y = -1

x = -2, y = 1

x = 2, y = -i

x = 2, y = 2

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Question # 30

The towers each 120 meters high are 800 meters apart. The measure of the angle of elevation from the base of one tower to the top of the other is

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12^𝜊

9^𝜊

7^𝜊

-120^𝜊

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Question # 31

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