Univers Technologique

Question 2

what are the lines in a technical drawing? what do they look like? what are they for?

Answer 2

• ligne de contour visible (straight, bold line) - indicate contours and visible details of the object.
• ligne de contour cache (dotted lines) - indicate hidden contours and details of an object
  -ligne d’axe (line in the middle,) - indicates the symmetry of an object
• ligne de cotes (continuous line with arrows) - indicates the limit of a segment
  -ligne d’attache (two small lines) - indicates extremities of the ‘ligne de cotes’

Question 3

what is an ‘echelle a grandeur reelle’?

Answer 3

dimensions are at the object’s real measurements (exp: 1:1)

Question 4

what is an ‘echelle en agrandissement’?

Answer 4

dimensions of real object are increased in drawing (exp: 2:1)

Question 5

what is an ‘echelle en reduction’?

Answer 5

dimensions of real object are reduced in drawing (exp: 1:2)

Question 6

what are the 5 mechanical functions

Answer 6

• liaison
• guidage
• lubrification
• support
• etanchite

Question 7

what is a liaison?

Answer 7

keeps two pieces together (nail)

Question 8

what is a guidage?

Answer 8

guides an object in a movement (rails)

Question 9

what is lubrification?

Answer 9

substance that lessens friction (oil)

Question 10

what is an etanchite?

Answer 10

am organ that stops a fluid from escaping

Question 11

what is a support?

Answer 11

a part that permits another part to move well

Question 12

what are the three parts of a mechanism?

Answer 12

• organe moteur
• organe recepteur
• organe intermediaire

Question 13

what is an organe moteur?

Answer 13

part of the system where force is applied

Question 14

what is an organe intermediaire

Answer 14

part of a system where force is applied

Question 14

what is an organe recpeteur?

Answer 14

receives the mouvement

Question 15

what is an organe intermediaire?

Answer 15

part of a system that communicates the action of an organe moteur onto the organe receveur

Question 16

what is a reversible mechanism?

Answer 16

when the organe moteur and the organe receveur can switch and the mechanism will still function

Question 17

what are the five different systems of TRANSMISSION? also, are they reversible or not?

Answer 17

• l’engrenage/system a roues dentees (reversible)
• la chaine et les roues dentees (reversible)
• la roue et la vis sans fin (non reversible)
• les roues de friction (reversible)
• la courie et les poulies (reversible)

Question 18

what are the five different systems of TRANSFORMATION? also, are they reversible or not?

Answer 18

• pignon et creamlier (reversible)
• vis ecrou (non reversible)
• le systeme came et tige-guidee (non reversible)
• le system bielle-manivelle (reversible)

Question 19

what are the 5 properties of a material?

Answer 19

• durete
• ductilie
• malleabilite
• elasticite
• resistance a la corrosion (rouille)

Question 20

what is durete?

Answer 20

capacity to resist deformation when penetrated by a hard body

Question 21

what is ducilite?

Answer 21

capacity to be stretched without rupturing from a force of traction

Question 22

what is malleabilite?

Answer 22

capacity to bend without breaking and staying in that form

Question 23

what is elasticite?

Answer 23

capacity of an object to deform and then retake its initial form

Question 24

what is resistance a la corrosion?

Answer 24

capacity to resist chemical changes that can cause corrosion