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

- 4A(t)
- 0.099A(t)
- 16A(t)
- 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

- C=AV
- C=V/A
- C=A/V
- C=A+V

c

MCQ 323:

System in which output characteristics depend explicitly upon time is known as

- Time-invariant system
- Time-variant system
- Non-linear system
- Constant system

b

MCQ 324:

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

- u
^{∂v}⁄_{∂x}+v^{∂u}⁄_{∂x} - u
^{∂u}⁄_{∂x}+v^{∂v}⁄_{∂x} - uv
^{∂}⁄_{∂x}+^{∂u}⁄_{∂x}(uv) - 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

- separation
- scalar
- solution
- summation

c

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