Math
An engineer is designing a triangular support structure. If two angles of the triangle are 45° and 55°, what is the measure of the third angle?
The measure of the third angle is 180°−45°−55°=80°180°−45°−55°=80°
Which of the following is an example of a physical change?
A) Rusting of iron
B) Burning of wood
C) Melting of ice
D) Cooking an egg
C) Melting of ice
What is the primary function of a computer's central processing unit (CPU)?
A) Store data
B) Display graphics
C) Perform processing and calculations
D) Manage network connections
C) Perform processing and calculations
Which type of engineer designs buildings and structures?
A) Mechanical engineer
B) Civil engineer
C) Electrical engineer
D) Aerospace engineer
B) Civil engineer
Which of the following is NOT a branch of engineering?
A) Mechanical
B) Chemical
C) Electrical
D) Historical
D) Historical
A materials engineer measures the tensile strength (in MPa) of five samples of a new alloy: 200, 210, 205, 215, and 220. What is the mean tensile strength of the samples?
Mean=(200+210+205+215+220)/5=1050/5=210 MPa
What is Newton's Third Law of Motion?
A) An object at rest stays at rest.
B) Force equals mass times acceleration.
C) For every action, there is an equal and opposite reaction.
D) Energy cannot be created or destroyed.
C) For every action, there is an equal and opposite reaction.
Name one renewable energy technology and briefly describe how it works.
A) Nuclear power: Splits atoms to release energy
B) Solar panels: Convert sunlight into electricity using photovoltaic cells
C) Coal plants: Burn coal to produce electricity
D) Diesel generators: Use diesel fuel to generate power
B) Solar panels: Convert sunlight into electricity using photovoltaic cells
Which type of engineer focuses on designing and maintaining electrical systems?
A) Civil engineer
B) Mechanical engineer
C) Electrical engineer
D) Environmental engineer
C) Electrical engineer
What is a blueprint?
A) A plan or drawing that shows how something is designed
B) A type of material used in construction
C) A kind of measurement tool
D) A safety protocol
A) A plan or drawing that shows how something is designed
A civil engineer is designing a straight road. The equation of the road in a coordinate system is given by 𝑦=2𝑥+3 What is the slope of the road, and what does the slope represent in this context?
The slope of the road is 2. The slope represents the steepness of the road, meaning for every unit increase in x (horizontal direction), y (vertical direction) increases by 2 units.
What is the difference between science and engineering?
A. Science focuses on understanding the natural world, while engineering applies scientific knowledge to solve real-world problems.
B. Science only involves experiments, while engineering involves building things.
C. There is no difference between science and engineering.
A. Science focuses on understanding the natural world, while engineering applies scientific knowledge to solve real-world problems.
Explain the difference between hardware and software in computer systems.
A) Hardware is the digital data; software is the physical equipment
B) Hardware includes the CPU; software includes the monitor
C) Hardware refers to physical components; software refers to programs and applications
C) Hardware refers to physical components; software refers to programs and applications
What does a chemical engineer primarily work with?
A) Computers and software
B) Chemical substances and processes
C) Electrical circuits
D) Mechanical devices
B) Chemical substances and processes
What does CAD stand for in engineering?
A) Computer-Aided Design
B) Calculated Application Design
C) Coordinated Assembly Drawing
D) Computational Architecture Device
A) Computer-Aided Design
An engineer is planning to invest in a project. She invests $1,000 at an annual simple interest rate of 5%. How much interest will she earn in 3 years?
Using the simple interest formula
𝐼=𝑃⋅𝑟⋅𝑡 ( I = interest, P = Principal, r = rate, t = time(years))
𝐼=1000⋅0.05⋅3=150
She will earn $150 in interest.
Which element is most commonly used as a semiconductor in electronics?
A) Gold
B) Silicon
C) Copper
D) Iron
B) Silicon
How do renewable energy technologies like solar panels and wind turbines contribute to sustainable engineering practices?
A. They are cheaper to produce than traditional energy sources.
B. They harness natural, inexhaustible resources to generate electricity, reducing reliance on fossil fuels.
C. They consume more energy than they produce.
D. They rely solely on non-renewable energy sources.
B. They harness natural, inexhaustible resources to generate electricity, reducing reliance on fossil fuels.
What is the role of software engineering in modern technology, and what is an example of its application?
A. It only involves hardware design and development.
B. It is focused on manufacturing physical products like cars and appliances.
C. It involves the design, development, testing, and maintenance of software systems, such as operating systems like Windows or macOS.
D. It only deals with creating video games.
C. It involves the design, development, testing, and maintenance of software systems, such as operating systems like Windows or macOS.
What does the term "load-bearing" refer to in construction engineering?
A) A part that supports weight
B) A type of building material
C) A method of designing blueprints
D) A kind of safety equipment
A) A part that supports weight
A mechanical engineer is designing a cylindrical water tank. The tank has a radius of 3 meters and a height of 5 meters. What is the volume of the tank in cubic meters?
Use the formula for the volume of a cylinder
𝑉=𝜋𝑟2ℎ
𝑉=𝜋(3)2(5)
𝑉=𝜋⋅9⋅5
𝑉=45𝜋
𝑉 ≈141.37 cubic
hat is the principle behind a transformer in electrical engineering?
A) It converts electrical energy into mechanical energy.
B) It changes the voltage of alternating current.
C) It stores electrical energy for future use.
D) It measures electrical resistance.
B) It changes the voltage of alternating current.
How does the Internet of Things (IoT) impact daily life and modern engineering?
A) It reduces the need for electricity
B) It connects everyday objects to the internet, enabling smart homes and improved healthcare
C) It simplifies programming languages
D) It eliminates the need for engineering
B) It connects everyday objects to the internet, enabling smart homes and improved healthcare
A team of engineers is working on a project to design and build a new, eco-friendly bridge over a river. This bridge needs to support heavy traffic, withstand harsh weather conditions, and be constructed with sustainable materials.
Which four types of engineering disciplines are most likely to be involved in this project, and what is the specific role of each type of engineer?
A) Civil Engineering: Designing the structural integrity and overall layout of the bridge.
B) Mechanical Engineering: Ensuring the bridge's moving parts, such as expansion joints, function correctly.
C) Electrical Engineering: Developing the electrical systems, including lighting and power supply for maintenance.
D) Environmental Engineering: Selecting sustainable materials and ensuring the project minimizes environmental impact.
E) Software Engineering: Writing code for the automated toll collection system on the bridge.
F) Aerospace Engineering: Designing the bridge to withstand high-speed winds similar to those an airplane encounters.
Choose the best combination of engineering disciplines involved in this project:
Correct Answer: 2. A, B, C, D
In electrical engineering, what does the term "resistance" refer to?
A) The flow of electric charge
B) The opposition to the flow of current
C) The power consumed by a device
D) The voltage applied to a circuit
B) The opposition to the flow of current