Questions with Verified Answers |
100% Correct| Latest 2025/2026.
The ratio between the ultimate strength and the allowable stress
is defined as
A. Ultimate stress
B. Maximum allowable load
C. Working stress
D. Factor of safety
E. Elastic limit ⬛ D
Which of the following constitutes a Class C fire?
A. Fire in an electrical panel
B. Fire in a fuel tank
C. Fire in a lumber pile
D. Fire in a coal bunker
E. Fire in a pile of paper ⬛ A
,The greatest load that can be applied to a material under is
i,
design conditions is called
A. Ultimate stress
B. Elastic limit i,
C. Allowable stress
D. Factor of safety
E. Maximum allowable load ⬛ E
External tensile forces acting parallel but not in line produces:
A. Tensile stress
B. Compressive stress
C. Working stress
D. Shear stress
E. Compressive strain ⬛ D
If an object is in motion along a fractional surface in a certain
direction what will be the direction of frictional force exerted on
that object?
A. Same
B. Opposite
C. Perpendicular
D. Angular with
,E. Angular against ⬛ B
Which reference to scalars and vectors, a space diagram:
a. Illustrates the position of the planets and the stars
b. illustrates a system of vectors
c. shows the relationship of the scalars to the vector
d. illustrates a system of scalars
e. shows the relationship of time to the vector ⬛ B
The flow of heat from molecule to molecule within a substance or
from molecule of one body to those of another body in direct
contact with it is defined as: a. Conduction
b. Convection
c. Specific heat
d. Latent heat of fusion
e. Absolute pressure ⬛ A
Water is the best extinguisher for:
A. An oil fire
B. A gas fire
C. An electrical fire
, D. A wood fire
i,
E. A metal burning fire ⬛ D
The coefficient of friction is defined as:
A. the downward force on the two services in contact
B. The force parallel to the surface required to start an object
moving
C. The reaction normal perpendicular to the surface
D. The force parallel to the service required to keep an object
moving at a constant linear velocity
E. The ratio of the force required to move up body to the ⬛ E
To start a body moving which of the following must be
overcome?
A. Kinetic friction
B. Static friction
C. Fluid friction
D. Rolling friction
E. Normal force ⬛ B
Foam extinguishers are recommended for?
A. Class A and Class C fires