WorksheetsBCME
Total questions: 70
Worksheet time: 42mins
Alloy is ....
an alloy formed by mixing copper and zinc
an alloy formed by mixing iron and carbon
a combination of different metals
metals containing iron
Ferrous materials is ...
an alloy formed by mixing iron and carbon
metals containing iron
a metal not suitable as structural materi al
a combination of different metals
Engineering materials can be divided into ...
ferrous and non-ferrous
iron and steel
metal and non-metal
cooper and concrete
Steel (Fe + C) is a widely used ... metal.
non-ferrous
metal
ferrous
non-metal
Aluminium (AI) is a common ...
metallic
metal
ferrous
non-metal
Composite materials such as carbon-fibre used in ...
aerospace and building
Formula 1 cars and PVC
aerospace and Formula 1 cars.
compound and mixture
What is the main role of an engineer?
To create art pieces
To design, build, and maintain structures, machines, and systems
To study ancient civilizations
To write novels
Which of the following is a common task for a mechanical engineer?
Designing software applications
Developing new materials
Designing and testing mechanical devices
Studying plant biology
What kind of product uses a spur gear?
Childs toy
Bottle opener
Clock
Bike
In Annealing, cooling is done in which of the following medium?
Air
Water
Oil
Furnace
In normalizing, cooling is done in which of the following medium?
Air
Water
Oil
Furnace
To get the desired property of steel by heating and cooling process........
Normalising
Hardening
Heat treatment
Tempering
Name of the process having fine grains structure and mechanical properties ......
Annealing
Tempering
Normalising
Hardening
how to increase hardness of steel
by doing annealing
by doing quenching
by doing normalizing
by doing full annealing
Definition of heat treatment of steel
controlled heating and cooling of metals
alter their physical and mechanical properties
performed after metals undergo metal work such as cold roll, drawing, extrusion and etc
causes the material properties of metals change
FALSE of purpose heat treatment
to improve machinability
refine grain size
to produce a hard surface on a ductile interior
to decrease mechanical properties
FALSE of heat treatment cycle
heating
cooling
annealing
soaking
soaking is
soaked to enough time and let the changing happen
heated to certain temperature
soaked to certain temperature
soaked to certain rate
Where do we fire our ceramic work?
An oven
A kiln
A microwave
A fireplace
What is a composite material?
A material system composed of two or more physically distinct phases
A material system composed of only one phase
A material system composed of three or more physically distinct phases
A material system composed of four or more physically distinct phases
What are the functions of the matrix in reinforced plastics?
Support the fibers in place and protect the fibers against physical damage and the environment
Support the fibers in place and enhance the color of the fibers
Protect the fibers against physical damage and enhance the color of the fibers
Support the fibers in place and protect the fibers against chemical damage
What type of fibers are the least expensive of all fibers?
Glass Fibers
Carbon Fiber
Ceramic Fiber
Graphite Fiber
Composites always have at least a ______ and a _______
structure and tensile strength
matrix and structure
tensile strength and reinforcement
matrix and reinforcement
Fire point of composite is high.
True
False
Which of the following is a ceramic material?
LCS
ABS
Carbon fibre
Silicon nitrite
Most ceramic materials have good insulation properties.
False
True
What is the matrix in a composite part?
What are the two most used forms of polymeric composites?
Polyester-reinforced composites
Fiber-reinforced thermoplastics and fiber-reinforced thermosets
What is an example of a metal matrix composite (MMC)?
Composite Military Helmets and Body Armor
Graphite Fiber
Aluminum-matrix Composite Brake Calipers
Glass Fibers
Which composite material is used to make skis?
Optical fibres
Photochromic glass
Fibre glass
Reinforced concrete
Fibre glass is stronger than steel.
True
False
Which of the following is a casting process?
Forging
Sand molding
Machining
Extrusion
What is definition of manufacturing from technical view
Process of converting raw materials into product include
-the design of the product
-the selection of raw materials
-the sequence of processes through which the product will be manufactured
-Input
-transformation process
-output
fixed position layout
process layout
compression forming process in which the work metal is forced to flow through a die opening to produce a desidred cross sectional shape
The schematic illustration is refer to
hollow extrusion process
semi hollow cross section process
direct extrusion process
semi hollow cross sections process
Drilling, sawing, milling and turning refer to the process of:
Melting
Grinding
Machining
Sharpening
What process is used to weld a bicycle frame from individual pieces of metal tubing?
(a)
Which of the following products could be made by sand casting?
Scale model cars, tools, gears
Engine parts, sharpeners, gears
Engine parts, tools, scale model cars
Engine parts, tools, gears
Choose two advantages of using 3D printing.
Its is cheap to set up and operate
You can print any design no matter how complicated it is
Products can be created when needed
You can use any material with a 3D printer
What is the process of converting raw material into a finished product using machine and machine tools?
Casting process
Powder metallurgy
Metal forming
Machining
What is the model or replica of a casting, used for making a cavity or mould?
Foundry
Mould
Pattern
Casting
In which metal forming process is the component formed through the plastic deformation of the metal or alloy?
Extrusion
Rolling
Wire drawing
Forging
At what temperature is the deformation carried out in hot forging process?
At melting temperature
Greater than recrystallization temperature
At room temperature
Below recrystallization temperature
What is the material heated to in the forging process?
Room temperature
Plastic state temperature
Recrystallization temperature
Melting temperature
What is the process of shaping metal by heating it and then hammering or pressing it into the desired shape?
Extrusion
Rolling
Forging
Wire drawing
In a four-stroke engine each cylinder has
One valve
Two valves
Three valves
Four valves
Diesel fuel, compared to petrol is
less difficult to ignite
just about the same difficult to ignite
more difficult to ignite
highly ignitable
Odometer is an instrument used for measurement of
power
Fuel consumption
Engine speed
distance
What is full form of SI
Simple Ignition
Standard idling
Spark ignition
Solo identification
What's full form of CI
Compression inefficiency
Computerised injection
Compressed injection
Compression ignition
What direction is the piston traveling during the Power-Stroke?
Up
Down
Left
Right
What position are the valves in during the intake stroke
Intake Closed, Exhaust Closed
Intake Open, Exhaust Open
Intake Open, Exhaust Closed
I have no idea
In an actual 4 stroke SI engine, exhaust valve opens...
At TDC
At BDC
Before TDC
Before BDC
What are the four strokes in a four-stroke engine?
Inlet, contraction, combustion, evacuation
Intake, compression, ignition, exhaust
Ingestion, compression, ignition, emission
Intake, compression, combustion, exhaust
What is it?
combustion stroke
exhaust stroke
intake stroke
compression stroke
There are three strokes in the operation of the 4-stroke gas engine
True
False
What is it?
combustion stroke
comression stroke
intake stroke
exhaust stroke
what is it?
exhaust stroke
combustion stroke
comression stroke
intake stroke
During the combustion stroke the piston moves________
The machining process that adds rather than removes materials is called
Electrical discharge machining
Additive Manufacturing
Plasma coating
Chip thinning
Surface on which prints are built
Build plate
Filament
Slicer
Extruder
The common format of file system for Rapid prototyping is
IGES
JPEG
STL
Subtractive manufacturing involves:
a) Adding material layer by layer
b) Removing material from a solid block
c) Joining parts together
d) Deforming material
Additive manufacturing more commonly known as:-
a) Subtractive manufacturing
b) Milling
c) 3D printing
d) Casting
What is additive manufacturing?
a) Removing material to create an object
b) Adding material layer by layer to create an object
c) Melting material to create an object
d) Assembling parts to create an object
