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WorksheetsGrade 8 Revision
Total questions: 50
Worksheet time: 27mins
Pliers and scissors use a type of mechanism called ---------.
(a)
Levers are sometimes joined together with ------- to change the direction of motion
(a)
Mechanisms are used to change which of the following?
Noise level
Speed
Direction of motion
Type of location
Distance traveled
Which of the following mechanisms/products has an oscillating output motion
Sewing machine
Windscreen wipers
Bicycle
clock
Coal is...
A renewable source of energy
A non-renewable source of energy
Wind is ...
clean, safe & available
clean, cheap & limited
cheap, unlimited & safe
unavailable, expensive & clean
Flowing water is..
A non-renewable source of energy
A renewable source of energy
Petroleum is..
cheap & clean
available & unlimited
limited & non-renewable
What is Linear motion?
motion in a clockwise line
motion in a straight line
motion in a circle line
motion in a rotational line
What will happen to point C when you move the point B?
Point C will rotate anti-clockwise
Point C will rotate clockwise
Point C will move up and down
Point C doing nothing
What types of gear in picture?
Worm gear
Bevel gear
Spur gear
Basic gear
Select the linkage that can change the direction of objects or force by 90°
Which type of motion is in a circle?
Linear
Reciprocating
Oscillating
Rotary
Which type of motion is backwards and forwards in a straight line?
Linear
Reciprocating
Oscillating
Rotary
Which type of motion is backwards and forwards about a pivot point?
Linear
Reciprocating
Oscillating
Rotary
Which type of motion is a straight line in one direction?
Linear
Reciprocating
Oscillating
Rotary
A Grandfather clock uses which two types of motion?
Rotary & Oscillating
Rotary & Reciprocating
Reciprocating & Linear
Rotary & Rotary
Which two motions does this mechanism use?
Reciprocating & Linear
Rotary & Oscillating
Oscillating & Reciprocating
Rotary & Rotary
what is a circuit
A circuit is a closed path that allows electricity to flow from one point to another
electricity
How is the electricity sent around a house?
Through Internet
In a circuit
By construction
People who design buildings are called as architects
True
False
What symbol is shown?
capacitor
resistor
thermistor
light dependent resistor
What is this symbol?
variable resistor
potentiometer
diode
switch
What is this symbol?
variable resistor
potentiometer
diode
switch
What is this symbol?
transistor
light emitting diode
loudspeaker
motor
What is this symbol?
transistor
light emitting diode
loudspeaker
motor
Which component is used to amplify or switch electrical signals and was instrumental in the making of computers?
capacitor
resistor
transistor
thermistor
What are the three types of woods?
Softwoods
Manufactured Boards
Strongwoods
Hardwoods
Lightwoods
Where do softwoods come from?
Deciduous trees
Coniferous trees
Where do hardwoods come from?
Coniferous trees
Deciduous trees
Which of these is a coniferous tree?
What does MDF stand for?
Mid Depth Fibreboard
Medium Direction Fireboard
Medium Density Fibreboard
Manufactured Fibreboard
Which of these is a deciduous tree?
What unit do we use in DT?
kilograms
millimeters
centimeters
meters
The ability to withstand impacts;
tough
malleable
hard
ductile
strong
The ability to be stretched into a wire;
tough
malleable
hard
ductile
strong
The ability to resist being scratched or indented;
tough
malleable
hard
ductile
strong
The ability to be hammered into shape;
tough
malleable
hard
ductile
strong
The ability to withstand being deformed by a force;
tough
malleable
hard
ductile
strong
The ability for energy to flow through;
durable
conductor
insulator
transparent
transluscent
The ability for light to flow through;
durable
conductor
insulator
transparent
translusent
It is a drawing instrument used when making
horizontal lines. It is also used for guiding triangles when
drawing vertical lines.
T-square
Triangle
Compass
Divider
It is a three-sided ruler, which typically has two
equal sides meeting at a 90 degree angle and to a third
side at 45, 30, including 60 degree angles.
T-square
Triangle
Compass
Divider
This drawing instrument is used when drawing
arcs and circles.
T-square
Triangle
Compass
Divider
