Eng and sci Exam Study

Question 1

Bevel gear and crown gear do?

Answer 1

Speed up and slow down, makes something change in 90 degrees

Same thing

Question 2

Spur gear and idler gear

Answer 2

To spread up or slow down

To help with the direction

Question 3

Worm gear

Answer 3

Makes something slow down and changes axis of rotation

Question 4

3 types of forces

Answer 4

Tensile force- stretch or pull apart

Compressive- squash or push together

Shearing- top falling over bottom like twisting

Question 5

Hooked law

Answer 5

Force= force constant times change in lengths

Question 6

Mechanical advantage equation?

And example

Answer 6

Load/effort and an example is load distance 5cm/ effort distance 10 to have a mechanical advantage of 2

Question 7

Metres per second is a measurement of,

Answer 7

Speed

Question 8

Newtons-meters is a measure of?

Answer 8

Torque

Question 9

Something that goes forward?

Up and back repetitive

Around in a circle

Up back like a wave or sea saw

Answer 9

Linear

Reciprocation

Rotary

Oscillation

Question 10

When you are being stretched out?

Answer 10

Tension

Question 11

Weight is a measurement of how heavy your body is measured in kilograms?

Answer 11

False it’s your body mass

Question 12

Try to lift 2000n but a pump only required him to use 400n in effort, what the MA?

Answer 12

2000/400

5 MA

Question 13

If there is one rope in a pulley the MA EQUALS

Answer 13

1

Question 14

Which gear changes rotary to linear motion??

Answer 14

Rack and pinion

Question 15

Bevel gear is to change the axis of rotation but no the gear ratio

Answer 15

True

Question 16

Gears that change rotary to refiprocating?

Answer 16

Cam gear

Question 17

When u are spinning a handle and it has 8 teeth and the other two that it’s spinning have 24?

Answer 17

The ratio is 3 to 1

Question 18

Class of levers?

1: fulcrum is in middle
2: lad in middle, effort at end and fulcrum start
3: effort in middle, load and fulcrum at ends

Answer 18

Tru

Question 19

Can a first class lever have a mechanical advantage of more than lne?

Answer 19

True

Question 20

If it’s kg and you need to convert it to newtons it has to be times by 10!

Answer 20

200kg times 10= 2000n
Effort= load/4
2000/4= 500n

Question 21

Length divided by width, what is the mechanical advantage

Answer 21

Length of a axe 30cm and width 10cm.

The MA equals 31