the object moves in a straight line

Transmission ratio is:

the ratio between the size of friction wheels and the speed

Screw and nut mechanism:

Converts rotary motion into linear motion

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Mechanisms 2ºESO

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Questions 20

Answers

1
The effort (F) needed to lift a weight (R) using a fixed pulley is:
F=R/2
F=R
F=Rx1000
F=R-8
2
An appliance of rack an pinion is:
washing machines
bicycles and motorcycles
garage doors
clocks
3
Which gear rotates faster?
The bigger
They do not rotate because they have linear motion
They both rotate at the same speed
The smaller
4
The driver element in a car is:
the doors
the wheels
the gearbox
the engine
5
An object having oscillating motion:
does not move
moves in circles
moves in a straight line
moves backwards and forwards
6
This is a:
Fixed pulley
Moveable pulley
Lever
Gears
7
In the belt and pulley the wheels rotate:
in the same direction
in the opposite direction
they do not rotate
at the same speed
8
The following mechanism is a:
Gear
Cam
Worm gear
Wheel
9
An appliance of chain and sprockets is
clocks
washing machines
bicycles and motorcycles
tunning strings of musical instruments
10
In linear motion:
the object moves in a straight line
the object moves backwards and forwards
the object trace a curve
the object moves in circles
11
Transmission ratio is:
the ratio between the size of friction wheels and the speed
is measured in meters
is used in cams
is the ratio between the effort and the resistance
12
The driven element in a car is:
the gearbox
the wheels
the engine
the doors
13
Which of the following mechanisms do not have rotary transmission?
Levers
Gears
Friction wheels
Chain and sprockets
14
Screw and nut mechanism:
Converts linear motion into linear motion
here´s no motion at all
Converts rotary motion into linear motion
There is reciprocating motion
15
Mechanisms are devices that:
transmit and/or convert electricity
all of the above are true
transmit and/or convert motion
are structures
16
This is a
3rd class lever
All others are false
1st class lever
2nd class lever
17
The following mechanism is a:
Gear
Wheel
Worm gear
Crank and slider
18
The following gears rotate:
they do not rotate
at the same speed
in the opposite direction
in the same direction
19
The following mechanism is
worm gear
not a mechanism
cam
rack and pinion
20
The following mechanism is a:
gears
chain and sprockets
belt and pulley
friction wheels

Mechanisms 2ºESO Flashcards | StudBud