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1. 
Cogwheel or gear system means in spanish:
A.
Palanca
B.
Sistema de poleas
C.
Rueda dentada o sistema de engranaje
2. 
Gear systems are used...
A.
to transmit rotary motion through one gear phase.
B.
to transmit and transfer rotary motion through many gear phases.
C.
to transmit and transfer rotary motion through one or more gear phases.
3. 
The sentence "Gear systems are similar to pulley systems" is...
A.
True
B.
False
4. 
In a cogwheel system...
A.
The wheels come into direct contact with one another, like friction wheels.
B.
The wheels rotates thanks they are joined by a belt.
C.
There are only one wheel.
5. 
The module of a cogwheel is calculated with the formula:
A.
M = D/Z where M is the module; D is the number of teeth and Z is the diameter of the wheel.
B.
M = D:Z where M is the module; D is the diameter of the wheel. and Z is the number of teeth.
C.
M = D*Z where M is the module; D is the diameter of the wheel. and Z is the number of teeth.
6. 
For two cogwheels to engage together they must have the same module.
A.
True
B.
False
7. 
To calculate the velocity of a gear is used the formula:
A.
Vi x Zi = Vo x Zo where Vi and Vo are the velocity of the input and output gear; Zi and Zo are the number of teeth of the input and output gear.
B.
Vi x Zi = Vo x Zo where Vi and Vo are the number of teeth of the input and output gear; Zi and Zo are the velocity of the input and output gear.
C.
Vi/Zi = Vo/Zo where Vi and Vo are the velocity of the input and output gear; Zi and Zo are the number of teeth of the input and output gear.