QUESTIONS AND ANSWERS | 2025/2026 LATEST UPDATED | 100 %
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define Enthalpy - (ANSWER)total energy of a system
Which of the following is true of the electric field intensity about an isolated point charge?
A. It varies directly as the distance to the charge.
B. It varies inversely as the distance to the charge.
C. It varies directly as the square of the distance to the charge.
D. It varies inversely as the square of the distance to the charge. - (ANSWER)D. It varies
inversely as the square of the distance to the charge.
As a professional engineer originally licensed 30 years ago, you are asked to evaluate a newly
developed computerized control system for a public transportation system. You may accept this
project if:
A. you are competent in the area of modern control systems
B. you do not live in the jurisdiction where the transportation system is being installed
C. your original area of specialization was in transportation systems
,D. you have regularly attended meetings of a professional engineering society - (ANSWER)A.
you are competent in the area of modern control systems
The SI system uses (1) for mass and (2) for weight (force). - (ANSWER)1) Kilograms
2) Newtons
Mass is a constant property of an object where (1) varies with gravitational field. -
(ANSWER)1) weight
What is a metric ton? - (ANSWER)A metric ton also known as a tonne, is 1000 kg
What is a kip? - (ANSWER)The abbreviation "kip" is used for "kilo-pound": 1000 pounds of
force
What basic SI unit is equal to kg*m^2/s^2 - (ANSWER)Kinetic energy is calculated in SI units
as (1/2)mv^2, with units of the joule
Which of the following is false for an identity matrix, I?
(a) I is a square matrix
,(b) All entries in I are zero, except the entries whose row and column numbers are equal
(c) all nonzero entries are equal to 1.
(d) AI=A^-1 - (ANSWER)The main property of an identity matrix is that AI=A. Therefore,
choice (d) is false
Which of the following statements is true for a power series with the general term aix^i?
I. An infinite power series converges to for x<1
II. Power series can be added together or subtracted within their interval of convergence.
III. Power series can be integrated within their interval of convergence
(a) I only
(b) II only
(c) I and II
(d) II and III - (ANSWER)Power series can be added together, subtracted from each other,
differentiated, and integrated within their interval of convergence. The interval of convergence is
-1 < x <1. Therefore the answer is D
What is a matrix? - (ANSWER)A matrix is an ordered set of entries arranged rectangularly and
set off by brackets.A matrix itself has no particular value, it is merely a convenient method of
representing a set of numbers.
, When can you multiple two matrices together? - (ANSWER)A matrix can be multiplied by
another matrix, but only if the left-handed matrix has the same number of columns as the right-
hand matrix has rows.
True or False: Addition and subtraction of two matrices are possible only if both matrices have
the same size and shape? - (ANSWER)True
What is an identity matrix? - (ANSWER)The identity matrix is a diagonal matrix, meaning that
it is a square matrix with all zero entries except for the aij entries, for which i=j. All nonzero
entries are equal to one, and the matrix has the property that AI=IA=A
The product of a Matrix A and its inverse, A^-1 , is the (1) - (ANSWER)1) identity matrix
A (1) has only magnitude. Mass, enthalpy, density, and speed are examples of this. -
(ANSWER)1) scalar
Force, momentum, displacement, and velocity are examples are (1). A (1) has a specific direction
and magnitude. - (ANSWER)1) vectors