EXAM POWER PACK – ENGINEERING
MECHANICS I (2026–2027)
. If r = {1 i + 2 j} m and F = {10 i + 20 j + 30 k} N, then the
moment of F about the y-axis is ____ N·m. - THE CORRECT ANSWER-
-30
In statics, a couple is defined as __________ separated by a
perpendicular distance. - THE CORRECT ANSWER-two forces of equal
magnitude acting in opposite directions
The moment of a couple is called a _________ vector. - THE
CORRECT ANSWER-free
A general system of forces and couple moments acting on a
rigid body can be reduced to a ___ - THE CORRECT ANSWER-single
force and single moment
The original force and couple system and an equivalent force-
couple system have the same _____ effect on a body - THE
CORRECT ANSWER-internal and external
Consider two couples acting on a body. The simplest possible
equivalent system at any arbitrary point on the body will have -
THE CORRECT ANSWER-one couple moment
, If a support prevents translation of a body, then the support
exerts a ___________ on the body. - THE CORRECT ANSWER-force
Internal forces are _________ shown on the free body
diagram of a whole body. - THE CORRECT ANSWER-never
Internal forces are not shown on a free body diagram because
the internal forces are_____. - THE CORRECT ANSWER-equal and
opposite and they do not affect the calculations
If a support prevents rotation of a body about an axis, then the
support exerts a ________ on the body about that axis. - THE
CORRECT ANSWER-couple moment
When doing a 3-D problem analysis, you have ________
scalar equations of equilibrium. - THE CORRECT ANSWER-6
One of the assumptions used when analyzing a simple truss is
that the members are joined together by __________ - THE
CORRECT ANSWER-smooth pin
In the method of joints, typically _________ equations of
equilibrium are applied at every joint. - THE CORRECT ANSWER-two
For the same magnitude of force to be carried, truss members
in compression are generally made _______ as compared to
members in tension. - THE CORRECT ANSWER-thicker