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