WorksheetsQUIZZARD 2022 MECHANICAL CONCEPT
Total questions: 121
Worksheet time: 1hrs 23mins
What is the importance of selecting the appropriate tool/mahine for the job?
For efficiency and to save on material
To show that you are aware of you job to be done
To prove to the supervisor that you know your tool/machine
Better able to master your job
State TWO (2) activities that can be performed by mechanical cutting tools..
Ripping, seaming
Sawing, shearing
brazing,drilling
cutting, molding
What is the purpose of the lubricant in mechanical cutting operations?
soothing, the blades
warn up cutting tool blades
help blades to move freely
cooling cutting tools blades
What is Tolerance?
The exact timing
An allowable limit, the normal value
Given time to tolerate a thing
Time value
What factor should be consider if you are to use the material in the most economical way? Let say that Quiz is in the form of A, B, C, D, and E.
Job specification instruction
Correct machine to be selected for cutting correct measuring equipment
Correct holding equipment
A B,,and C
None of the above
List the basic ingredients in concrete...
Cement
sand
crush stone
water
All of the above
When casting a concrete floor, which tool is used to level off the concrete to he top of the screeds?
Cordline
Level
Straight edge or strike off
A plumber's rule
Why should concrete be placed as close as possible to its final?
Prevent seperation of the ingredient
Nearer to work area
Easier to handle
To keep all the ingredients to the final
Explain why it is necessary for the work or sub grade to be wet before placing concrete.
For concrete to hold onto sub grade
for the mixture to remain soupy
So that the work is done in due time
For easier access of concrete onto work
Why is the water/cement ratio very important when mixing concrete? Let say that Quiz is in the form of A, B, C, D and E.
The quality of cement paste determine the quality of the concrete
Too much water will weaken the concrete
The more water the better the mix
A and B
C only
Explain what problems you may encounter in coordinating with other trades people?
Poor communication or confusion
Team work
Great business ideas
None of the above
How can the problems cordinating installation with trades person be resolved/
Get all persons involve in activities
Regular meetings, discussing objectives
Meeting once per year on business routine
Engage in other discussions
What does it mean to work as a member of a team?
Working to achieve the same objective
Working together to achieve different goals
Working to achieve the highest pay
Working to make the job easier
The amount of weight carried,especially by a vehicle ... is called ...
load
blocks
floats
outriggers
This tool is called
jib
pulley blocks
hook
loadsor
This tool is called
jib
pulley blocks
loadsor
hook
Something physical such as a force that has size and direction is called ...
repulsion
torque
strain
vector
We can give a pictorial representation of vector quantities...
What does it mean by pictorial?
something physical such as a force that has size and direction
consisting of or having the form of a picture or pictures
a small sail in the shape of a triangle, positioned in front of the main sail on a boat
to put something into a liquid for a short time
Under no circumstances should outriggers be placed on ground covered by puddles of water which prevent ...
Puddles of water means ...
rain in very small, light drops
a pool of liquid on the ground or floor, formed by filling up the holes in uneven surfaces
to drop a few pieces or drops of something over a surface
very small pieces of coloured sugar or chocolate used as a decoration on the top of cakes
This tool is called ...
flick
fling
swing
sling
To (cause to) fall over onto one side ...
slope
tip over
stip
tilt
Conductor is ...
a group of people, especially one that meets regularly for aparticular purpose, such as government, or, more generally, theprocess of coming together, or the state of being together
a framework (= basic structure) that something such as a sculpture isbuilt onto
a substance that allows heat or electricity to go through it
a part of an electrical circuit designed to produce a particular amountof resistance to the flow of current
He was out to get some air is an understatement ...
Understatement means ..
to describe something in a way that makes it seem less important,serious, bad, etc. than it really is
to offer to do work or provide a service for a lower price than someone else:
the side of something that is usually closest to the ground.
the lower part or the bottom surface of something
Energy that is produced using the sun, wind, etc., or from crops, rather than using fuels such as oil or coal is called ...
renewable energy
exothermic energy
exoergic energy
energy releasing
Strange and very modern, or intended or seeming to come from some imagined time in the future has synonym with ...
alternative
futuristic
unstylish
passee
In reality, some of the most effective ways of harnessing horsepower from nature are based on concepts.
The synonym of harnessing is ..
minimum
maximum
encourage
support
The wind turbine is an obvious example.
The meaning of obvious is (except) ...
demonstrable
open
provable
unnoticeable
The firm is planning to construct a tower a colossal one kilometer high.
The synonym of collosal is (except) ...
large
big
prodigious
insignificant
A tall metal structure with a long horizontal part, used for lifting and moving heavy objects is called ...
converter
pulley
tappet
crane
This picture is called ...
disc brake
suspension
carburetor
piston
This picture is called ...
disc brake
suspension
carburetor
piston
Energy that an object or system has because it is moving is called ...
shove
seethe
kinetic energy
libration
A soft, greyish-white material that does notburn, used especially in the past in buildings, clothing, etc. as a protection against fire and as a form of insulation (= a way of stopping heat from escaping) is called
lackquer
limestone
asbestos
flitch
The ability to float is called ...
heaviness
buoyancy
cowardice
deaden
Friction is a help in some cisrcumtances but a hindrance in others.
Hindrance has synonym with ...
something that makes it more difficult for you to do something or for something to develop
a fact or event that makes a situation the way it is
the act of stopping something happening, operating, etc. for a period of time
to not move any more or to make someone or something not move any more
The force that makes it difficult for one object to slide along the surface of another or to move through a liquid or gas is called ...
friction
strain
binding
vector
Equilibrium means
imbalance
angularity
straightness
a state of balance
In disc brake, this part has function to ensure that one brake pad is pushed against the inner surface of the disc while, simultaneously, the other pad is pulled against the outer surface is called ...
caliper
beam balance
probe
abacus
The tendency of something to return to its original shape after it has been stretched or compressed is called (except) ...
flexibility
extendable
elasticity
stuck
A (part of a) machine that presses gas or air into less space is called ...
fulcrum
compressor
shaft
shovel
(of a turning object) moving away from the point around which it is turning called ...
centrifugal
afferent
Foucault pendulum
nerve
A unit used to measure force, equal to the force that moves a mass of one kilogram one metre in one second is called ...
calorie
molar
force
dense
Hazardous materials means (except) ...
safe
unsafe
dangerous
risky
The cause of elasticity of a substance is
deformation
large internal restoring force
low internal restoring force
less distance between the molecules
The graph of stress against strain is always
straight line
parabola
Straight line in elastic region
parabola in elastic region
Young's modulus is property of
solids
solids and liquids
solids or liquids
gases
There are two identical wires with Young's moduli Y1 and Y2 respectively such that Y1> Y2. If they are hung from a rigid support and same weight is applied to them at their free ends then
elongation in the wires will be same
elongation in the first wire will be more
First wire will constrict more
Elongation in the second wire will be more
1 N/m2 = ____ dyne /cm2
1
1000
100
10
The bulk modulus of a material of a wire 1m long is B. So the bulk modulus of a 2m long wire of same material will be
2B
B
2/B
B/2
A balloon 's volume decreases by 1% when its pressure is increased by 80%. So its Bulk modulus is
80 unit
1/80 unit
1 unit
800 unit
If a force of 4 N is applied across a face of a cube whose sides are 2mm each then stress produced is
16N/m2
106N/m2
1
4
Compressibility is reciprocal of
Young's modulus
Modulus of elasticity
Shear modulus
Bulk modulus
If a wire breaks just after plastic flow begins then material is
strong
hard
brittle
ductile
The property by which a body returns to its original shape after removal of the force is called __________
a) Plasticity
b) Elasticity
c) Ductility
d) Malleability
The property of a material by which it can be beaten or rolled into thin plates is called __________
a) Malleability
b) Plasticity
c) Ductility
d) Elasticity
Which law is also called as the elasticity law?
a) Bernoulli’s law
b) Stress law
c) Hooke’s law
d) Poisson’s law
The materials which have the same elastic properties in all directions are called __________
a) Isotropic
b) Brittle
c) Homogeneous
d) Hard
A member which does not regain its original shape after removal of the load producing deformation is said __________
a) Plastic
b) Elastic
c) Rigid
d) None of the mentioned
The body will regain it is previous shape and size only when the deformation caused by the external forces, is within a certain limit. What is that limit?
a) Plastic limit
b) Elastic limit
c) Deformation limit
d) None of the mentioned
As the elastic limit reaches, tensile strain __________
a) Increases more rapidly
b) Decreases more rapidly
c) Increases in proportion to the stress
d) Decreases in proportion to the stress
The section modulus of a circular section about an axis through its C.G., is
(A) πd²/4
(B) πd²/16
(C) πd3/16
(D) πd3/32
If a part is constrained to move and heated, it will develop
(A) Principal stress
(B) Tensile stress
(C) Compressive stress
(D) Shear stress
At ________ the shearing stress in a beam are maximum.
a) Extreme fibres
b) Modulus of section
c) Neutral axis
d) Along the cross-sectional area
Hooke’s law holds good up to
yield point
limit of proportionality
breaking point
elastic limit
plastic limit.
Young’s modulus is defined as the ratio of
volumetric stress and volumetric strain
lateral stress and lateral strain
longitudinal stress and longitudinal strain
shear stress to shear strain
longitudinal stress and lateral strain.
The unit of Young’s modulus is
(a)mm/mm
(b)kg/cm
(c)kg
(d)kg/cm2
(e)kg cm2.
Deformation per unit length in the direction of force is known
Strain
Linear Strain
Lateral Strain
Unit Strain
The materials having same elastic properties in all directions are called
(a) ideal materials
(b) uniform materials
(c) isotropic materials
(d) paractical materials
(e) elastic materials.
Modulus of rigidity is defined as the ratio of
(a) longitudinal stress and longitudinal
strain
(b) volumetric stress and volumetric strain
(c) lateral stress and lateral strain
(d) shear stress and shear strain
(e) linear stress and lateral strain.
Which of the following has no unit
(a) kinematic viscosity
(b) surface tension
(c) bulk modulus
(d) strain
(e) elasticity.
Which of the following materials is most elastic
(a) rubber
(b) plastic
(c) brass.
(d) steel
For which material the Poisson’s ratio is more than unity
(a) steel
(b) copper
(c) aluminium
(e) none of the above.
The stress developed in a material at breaking point in extension is called
(a) fracture stress
(b) yield point stress
(c) breaking stress
(d) ultimate tensile stress
(e) proof stress.
In a simple machine, what is the load?
point where the lever arm pivots
the force needed to move the load
the mass lifted by a system
the distance the load travels
In a simple machine, what is the effort?
the force needed to move the load
the distance the load travels
the mass lifted by a system
the object being moved
What is the unit used to measure force?
meter
gram
Newton
liter
What is the point where the lever arm pivots?
load
fulcrum
mass
effort
In a class 1 lever system, what happens to the effort when the load moves away from the fulcrum?
effort decreases
effort increases
effort stays the same
effort changed direction
What class lever is pictured below?
Class-1 &3
Class-3
Class-2
Class-1
What kind of advantage does a moveable pulley provide to lift a 100-lb hay bale?
It will reduce the effort needed to lift the hay bale
It will increase the mass of the hay bale
It will provide no advantage
It will decrease the distance the hay bale will travel
How is a 2-pulley system more beneficial than a 1-pulley system?
It provides less mechanical advantage
It provides greater directional advantage
It provides less directional advantage
It provides greater mechanical advantage
Which of the following is NOT part of a pulley system?
rope
pulley
load
wedge
A travois, a Native American tool used to transport goods and people is picture here. What type of simple machine is a travois?
screw
wheel and axle
inclined plane
pulley
Why did Native Americans use a travois to transport goods?
to protect themselves from snakes
it was pretty
to make work easier
all of the above
An object is speeding up when: (Choose All That Apply) (May have to choose more than 1 to be right)
it is gaining kinetic energy.
it is losing kinetic energy.
it is gaining gravitational potential energy.
it is losing gravitational potential energy.
The sum of the kinetic and potential energy in a system is known as the system's _____________________ energy.
mechanical
chemical
thermal
combined
This drawing illustrates which of the following?
Conservation of Mechanical Energy
Conservation of Mass
Conservation of Momentum
Conservation of Matter
At which point in the picture must the cart have been moving the fastest?
Point 1
Point 2
Point 3
They would all be the same
At which point in the picture must the cart have the most MECHANICAL energy?
Point 1
Point 2
Point 3
They would all be the same
what is Translational Mechanical system?
Linear Motion
non linear motion
Both
None of the above
What is Rotational mechanical system?
Linear Motion
Rotational motion (Motion about an axis)
Both
None of the above
The Law which we are applying for motion of the Mechanical system is
Kirchoff's current law
Kirchoff's voltage law
newton's law of motion
all of the above
The Law which we are applying for Electrical system is
kirchoff's Law
Newton's law of motion
Lenz's law
all of the above
spring constant in translational Mechanical System is
K
B
A
T
The frictional coefficient is Mechanical Translational system is
A
B
T
C
How many Basic Elements are There in Mechanical System?
2
3
4
5
How many Basic Elements are there in Electrical System?
2
3
4
5
What is Mathematical modelling?
The mathematical models are equations which describe the relationship between the input and output of a system.
Represent in mathematical term but no relation between input and outpur.
Both
None
Find the correct one
F=Ma
F=M/a
F=M.a.a
all of the above
What type of machines are made by mechanical engineers?
Machines that think
Machines that make power
Machines that use power
Machines that smell
What kind of product uses a spur gear?
Childs toy
Bottle opener
Clock
Bike
What kind of product uses a bevel gear?
Childs toy
Bottle opener
Clock
Bike
Cams switch between which two types of motion?
Rotary and oscillating
Oscillating and linear
liner and reciprocating
Reciprocating and rotary
If a snail cam is turned the wrong way it will ...?
(a)
Name the Cams discussed in lessons.
Pear
Round
Eccentric
Snail
Electric
What type of lever is this?
Class 1
Class 2
Class 3
What type of lever is this?
Class 1
Class 2
Class 3
What type of lever is this?
Class 1
Class 2
Class 3
What happens if you move the fulcrum closer to the weight you are lifting?
You need less effort
The object weighs less
You need more effort
Nothing
