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WorksheetsY10 Engineering general knowledge
Total questions: 43
Worksheet time: 32mins
Static loading is a load that doesn't change over time. In engineering, static loads tend to be better defined and require less of a safety factor on them then dynamic loading. Which of the options does not refer to a static load?
A bridge
A moving car
A crane
A parked vehicle
Dynamic loads or forces are loads that ...... Select the correct statement.
that have changed in hither size, position or direction.
that have increased in size and changed position
that have changed position and direction
that have only changed in size.
The tension force ...
is directed over the length of the wire and pulls energy equally on the bodies at the ends
is represented by unaligned forces pushing one part of a body in one specific direction, and another part of the body in the opposite direction.
is the force that is transmitted through a rope, string or wire when pulled by forces acting from opposite sides.
is created when one part of the surface is pushed in one direction, while another part of the surface is pushed in the opposite direction.
A compression force or compressive force
occurs when a physical force presses inward on an object, causing it to become compacted
occurs when a force cause an object to twist.
occurs when a force cause an object to stretch in opposite directions.
is the application of power, pressure, or exertion against an object that causes it to become squeezed, squashed, or compacted. Like the force acting on columns.
Shear force
occurs when one part of the surface is pushed in one direction, while another part of the surface is pushed in the opposite direction
occurs when the two opposing forces are pushing into each other at the same point.
is when two parts of an object are pushed in different directions, for example, when a piece of paper is cut by scissors.
is a twisting force that is applied on an object by twisting one end when the other is held in position or twisted in the opposite direction.
Torsion
occurs when an object swings left and then right (or vise-versa), from a fixed point. A very good example of this is a classic pendulum clock.
is a repetitive movement left to right OR up and down. A good example of this type or motion is a piston, such as found in an engine.
is a twisting force that is applied on an object by twisting one end when the other is held in position or twisted in the opposite direction.
Select what types of motion you see in the picture
oscillating
linear
reciprocating
rotary
Pick the right label for these motion symbols
circulatory
rotary
unidirectional
linear
concentric
Which of these objects perform a reciprocating motion?
The locomotive
The piston engine
The bicycle wheel
The pendulum clock
Which of these object perform an a oscillating motion?
The bicycle wheel
The engine piston
The locomotive
The pendulum clock
Rotary motion is...
is turning round in a circle, such as a wheel turning.
moving in a straight line, such as on a paper trimmer.
moving backwards and forwards in a straight line, as in cutting with a saw.
when an object oscillates about an equilibrium position due to a restoring force or torque.
A linear motion........
involves an object moving from one point to another in a straight line. •
involves an object rotating about an axis. – examples include a merry-go-round the rotating earth or a turning wheel.
occurs when a torque is applied to an object about an axis, it provides a twist and this causes rotational motion.
is a repetitive up-and-down or back-and-forth linear motion. It is found in a wide range of mechanisms, including reciprocating engines and pumps.
The part of the structure that has a tensile force acting on it is called a.....
fulcrum
tie
strut
a bracket
The part of a structure that has a compressive force acting on it is called a ......
tie
strut
pivot
lever
In the picture the roof beams are under pressure from the weight of the tiles on the roof . The floor beam is being stretched, what types of forces are involved?
torsion
tensile
shear force
compression
In the diagram below, forces act across the entire length of the beam (it bends because of the ‘ton’ weight). When a structure bends like this it is ............... as it is being stretched.
under compression
in tension
being sheared
Levers are used to lift heavy weights with the least amount of effort. In the example below, the heavy weight on the left hand side is been lifted by the person because of the lever. Select the right statements.
The longer the ‘rod’ the easier it is to lift the weight. .
The shorter the rod the easier to lift the weight.
Levers can be used to exert a large force over a small distance at one end by exerting only a small force over a greater distance at the other.
The fulcrum is the place where the rod pivots (or rotates).
levers do not increase the force being applied to lift or push an object.
A good example of mechanical advantage is seen opposite.
An attempt is made to lift the injured Jeff. A plank has been placed under his body and it will be used as a ‘lever’. A football is used as a fulcrum. A fulcrum is the point at which a lever pivots. A mechanical advantage is...
the ratio between the load (Jeff) and the effort required to lift him from the floor
the distance between the load and the effort
is the distance between the fulcrum and the effort
An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. Which of the pictures refers to potential or stored energy?
In physics, the ---------------- of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
fulcrum
kinetic energy
state of equilibrium
the clockwise moment
Select the picture referring to kinetic energy
There are three types of levers: first class, second class and third class. The difference between the three classes depends on where the force is, where the fulcrum is and where the load is. In a first class lever
the load is in the middle between the fulcrum and the effort.
the fulcrum is located between the input force and output force.
the fulcrum is in the middle of the effort and the load.
the effort is in the middle between the fulcrum and the load.
A common second class lever example is a wheelbarrow where the effort moves a large distance to lift a heavy load, with the axle and wheel as the fulcrum. In a second class levers
the load is between the fulcrum and the effort
the effort is between the load and the fulcrum, for example in barbecue tongs
the effort moves over a large distance to raise the load a small distance.
the effort is between the load and the fulcrum
Third class levers a larger force is applied by the effort, the load travels a further distance. Since the load travels a further distance, its speed is also multiplied. In third class lever...
the fulcrum is in the middle of the effort and the load.
the load is in the middle between the fulcrum and the effort.
the effort is between the load and the fulcrum
A mechanical advantages of levers is-when..........
a lever's effort arm is shorter than its load arm
a lever's effort arm is longer than its load arm
levers can move large loads with a relatively small amount of effort.
is when levers require a large amount of effort to move a large load.
To recall the order of the levers use the term 'FLE' - this will help you to remember which part of the lever is in the middle.
In first class lever the fulcrum is in the middle.
in first class levers the load is in the middle
in second class lever - load is in the middle.
in third class levers the e fulcrum is in the middle.
in third class lever the effort is in the middle.
select the correct statements in relation the centre of gravity of an object
With balancing toys like the one in the picture, it is often a good idea to have the centre of gravity slightly above the position of the steel rod ( the fixed centre of rotation).
The center of gravity (CG) is where all of the weight of an object appears to be concentrated
The lower your center of gravity, the easier it is to keep your balance
if an object can rotate around its centre of gravity, it will not balance at that point.
the fixed point of rotation and the centre of gravity of an object is always at the same place.
Aerodynamics is the study of....
the design of furniture and machinery
forces and the motion of objects through the air.
of objects that are stationary
is the study of how air moves around things
In aerodynamics...... is created by the shape of the wing. The wing is designed to force the glider / aircraft upwards as the air flows on the top and bottom surfaces.
drag
thrust
lift
..............is the earth's natural downwards force.
thrust
gravity
drag
........is the power required to allow lift off of the glider and to maintain flight. An engine and propellers normally provide ......
gravity
thrust
lift
Anthropometric data refers to
the practical application of making products that fit the consumer
the study of the human body and its movement, often involving research into measurements relating to people. It also involves collecting statistics or measurements relevant to the human body
the application of measurements data applied to the design of a product,
Ergonomics refers to
the study of people and their relationship with the environment around them. Designing according to the needs of the user/customer.
to the study of the human body and its movements.
to the practical application of collecting anthropometric data in order to make products that fit the consumers.
the designing of stylish consumer products without the need of collecting relevant data.
Non ferrous metal.......
are metals that do not contain iron
are metals that contain iron
are metals formed by two or more elements
do not exist in nature as all metals are ferrous
Ferrous metals are .....
all the metals found in nature
the metals that contain iron
metals that do not contain iron
select from the option the ferrous metal
aluminium
iron
gold
copper
Select from the option an alloy of iron and carbon
copper
mild-steel
stainless steel
lead
wrought iron
Select the alloy
gold
copper
lead
carbon steel
silver
The terms monomer is very important in the plastics industry. A monomer is a relatively small molecule that can chemically bond to other monomers, forming a..........
mnomer chain
polymer
monymer
polysmer
These plastics possess a common property, they soften when heated and are often used in schools to vacuum form shapes. Usually, when heated and formed into a shape - if reheated they return to their original shape. What am I
a thermoplastic
a thermosetting plastic
Thermosetting polymers...........
do not soften on heating. They are used when resistance to heat is important (eg kettles, plugs, laptop chargers etc).
can be heated to change their original shape
such as polyethylene are used in the manufacture of 'plastic' bottles, grocery bags, shampoo bottles and children's toys.
such as melamine formaldehyde are used in the production of plastic laminates because of its smooth surface and hygienic qualities. It is also used in electrical plugs and sockets because it can be cast and it is an excellent insulator.
Select the correct statement for computer aided designing
is a slow and lengthy process rarely used in modern industries
3D design software such as AutoCAD or Sketchup, allow the designer to draw a product in detail
CAD allows for the testing of prototypes during the design process, without the need to make it.
is a process that consist of prototyping without the need for 3D modelling
Computer Aided Manufacture (CAM) . Large quantities can be produced 24 hours a day, reducing the final cost/price. Select applicable statements.
Means that most of the work has been carried out by human input
Has meant that products and components can be made repeatedly to the same high standard.
Means the production of products made by artisan specialized to carry out one task only
Accuracy of machining is consistently high and machining through CAM is much faster than machining by human control / by hand
