ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

Gooch crucible is made of :

• Brass. A
• Porcelain. B
• Bronze. C
• Gold. D

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

0.25 is ______

• An irrational number A
• A natural number B
• A prime number C
• A rational number D

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

• Associative property of addition A
• Associative property of multiplication B
• Additive identity C
• Multiplicative identity D

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' D

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex number D

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 D

a >b ⇒a +c >b +c is known as

• Trichotomy property A
• Additive property of inequality B
• Transitive property C
• Multiplicative property D

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

• 
  A
• 
  B
• 
  C

The square root of 2i - 20i is

• +-(5 - 2i) A
• +-(5 + 2i) B
• (5 - 2i) C
• None of these D

QUQ, =

• N A
• R B
• W C
• Z D

If z = (x,y) , then  z ̅  =

• (-x,y) A
• (x,-y) B
• (-x, -y) C
• None of these D

• 15 A
• 15 i B
• -15 i C
• -15 D

Name the property used in 4 + 9 = 9 + 4

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity D

• 
  A
• 
  B
• 
  C
• 
  D

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

Some of two real numbers is also a real number , this property is called:

• Commutative property w.r.t addition A
• Closure property w.r.t. addition B
• Associative property w.r.t. addition C
• Distributive property w.r.t addition D

• A rational number A
• An irrational number B
• An odd number C
• A prime number D

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

The set {1,2,3,4......} is called

• Set of natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

• A natural number A
• A rational number B
• An irrational number C
• A whole number D

(7, 9) + (3, -5) =

• (4, 4) A
• (10, 4) B
• (9, -5) C
• (7, 3) D

3/4 is ______

• An odd number A
• An even number B
• A natural number C
• A rational number D

• (a + b)c = ac + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b +c) = ab + ac D

• Reflexive property A
• Symmetric property B
• Cancellations property w.r.t. addition C
• Transitive property D

• real part of z A
• imaginary part of z B
• conjugate of z C
• modulus of z D

What is the conjugate of -7 -2i?

• -7 + 2i A
• 7 + 2i B
• 7 -2i C
• None of these D