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Mechanical Engineering
Machine Dynamics
Quiz 1
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Q.1
A door knob is an example of which machine?
wheel and axle
swrew
pulley
inclined plane
Q.2
A _______ is a rope or chain wrapped around a wheel.
wedge
lever
pulley
screw
Q.3
What is the equation for calculating work?
force times distance
force divided by distance
force plus distance
mass times acceleration
Q.4
What are the units for work?
newtons
meters
force
joules
Q.5
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.
wedge
screw
lever
inclined plane
Q.6
An inclined plane wrapped around a rod forms this simple machine
lever
pulley
screw
wedge
Q.7
It is defined as an activity done when a body or object moves with the application of external force is ________.
Work
Energy
Mechanical Advantage
velocity ratio
Q.8
The pair of two elements are not held together in mechanically it is called -----------.
lower pair
closed pair
open pair
higher pair
Q.9
Which is an example of higher pair?
cylindrical pair
sliding pair
car mirror
cam and follower
Q.10
Which is an example of rolling pair?
crankshaft
mirror in car
ball bearings
connecting rod
Q.11
Cylindrical Pair has a---- degree of freedom.
one
two
three
four
Q.12
If the relative motion between them is completely or successfully constrained then the pair is known as -------
rolling pair
kinematic pair
sliding pair
cylindrical pair
Q.13
A---------- is again a combination of links connected to each other but no relative motion exists between them.
MACHINE
CONNECTING ROD
MECHANISM
STRUCTURE
Q.14
---------is a combination of rigid or restraining parts or bodies from which the machine is assembled.
MACHINE
STRUCTURE
MECHANISM
CONNECTING ROD
Q.15
The branch of theory of machines that deals with forces and their effects while the machine parts are at rest.
KINEMATICS
KINETICS
STATIC
DYNAMICS
Q.16
The branch of mechanics which deals with only motions and not with the forces
STATIC
KINEMATICS
KINETICS
DYNAMICS
Q.17
What 2 factors decrease population size?
Immigration, Births
Emigration, Births
Emigration, Deaths
Immigration, Deaths
Q.18
A girl pushes a box across the floor. Did she do work?
no
yes
Q.19
Is work being done if I am trying to pick up a box but can not lift it?
yes
no
Q.20
AN block is liftedm. How much work was done?
50000 J
5000 J
500 J
50 J
0 h : 0 m : 1 s
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