Engineering Mathematics Certification Exam Tests

Engineering Mathematics Practice Test 65

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**MCQ 321**: If A' growth rate of number of bacteria at any time t is proportional to the number present at any time t and doubles in 1 week then bacteria after two week is

A) 4A(t)

B) 0.099A(t)

C) 16A(t)

D) 24A(t)

a

**MCQ 322**: A tank contains 400 gal of brine in which 100lb salt is disolved where fresh water runs into the tank at rate of 2 gal/min, if C is salt concenteration, A is amount of salt and V is volume of tank than

A) C=AV

B) C=V/A

C) C=A/V

D) C=A+V

c

**MCQ 323**: System in which output characteristics depend explicitly upon time is known as

A) Time-invariant system

B) Time-variant system

C) Non-linear system

D) Constant system

b

**MCQ 324**: In ^{∂}⁄_{∂x}(uv), where u and v are variables, is equals to

A) u^{∂v}⁄_{∂x}+v^{∂u}⁄_{∂x}

B) u^{∂u}⁄_{∂x}+v^{∂v}⁄_{∂x}

C) uv ^{∂}⁄_{∂x}+^{∂u}⁄_{∂x}(uv)

D) uv^{∂}⁄_{∂x}

a

**MCQ 325**: A function y=h(x) of a given ODE on some open interval a < x < b if h(x) is defined and differentiable throughout the interval and is such that equation become an identity is called

A) separation

B) scalar

C) solution

D) summation

c

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