Mathematics ECAT Pre Engineering Online Test With Answers

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Mathematics ECAT Pre Engineering Online Test

Sr. # Questions Answers Choice
1 The multiplicative inverse ofx^(-1) is x a-2 0 1
2 Some of two real numbers is also a real number , this property is called: Commutative property w.r.t addition Closure property w.r.t. addition Associative property w.r.t. addition Distributive property w.r.t addition
3 Q∪ Q' = Q Q' N R
4 Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called. Fractinal numbers Rational Numbers Even Numbers Whole Numbers
5 It is not possible to find the exact value of π √9 ∛27 √1
6 The square root of every incomplete square is an Rational numbers Even numbers odd numbers Irrational numbers
7 The decimal fraction in which we have finite number of digits in its decimal part is called. recurring decimal fraction Non terminating faction Non recurring fraction terminating decimal fraction
8 √11 is an irrational number Rational number odd number Negative number
9 There is no element common in N and W E and W N and O Q and Q'
10 Union of the sets of rational and irrational numbers is called 6th set of Natural numbers Real numbers Whole numbers Prime numbers
11 The set of rational number is represented by W R Q' <div>Q</div><div><br></div>
12 Rational number is a number which can be written as a terminating decimal fraction or a Non-terminating decimal fraction Non-recurring Recurring decimal fraction a, b and c
13 For each real number, there is a number which is its Negative Possitive Opposite Similar
14 The real number system contains. Positive Numbers Negative numbers Zero (option a, b and c)
15 Gooch crucible is made of : Brass. Porcelain. Bronze. Gold.
16 0 1 -1 None
17 If C is the mid point of AB and P is any point outside AB, then
18 A,. B, C are coincident A, B, C are collinear Both A and B None of these
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22 3j . k x i 0 1 3 9
23 The angle between the vectors 3i + j - k and 2i - j + k is
24 A 0 Unit vector None
25 If the vector 2i + 4j - 7k and 2i + 6j + xk are perpendicular then x = ? 0 2 4 7
26 If the angle between two vectors with magnitude 6 and 2 is 60° when their scalar product is 12 6 3 0
27 0 90° 180° 360°
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29 The direction cosines of y-axis are 1, 0, 0 0, 1, 0 0, 0, 1 1, 1, 1
30 l<sup>2</sup>+ m<sup>2</sup>+ n<sup>2</sup>= 0 l<sup>2 </sup>- m<sup>2</sup>+ n<sup>2</sup>= 1 l<sup>2</sup>+ m<sup>2</sup>+ n<sup>2</sup>= 1 l<sup>2</sup>+ m<sup>2</sup>- n<sup>2</sup>= 0
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