1.
What's this tool called?
Correct Answer
B. Screwdriver
Explanation
The tool being referred to in the question is called a screwdriver.
2.
Henry F. Phillips patented the Phillips screw and screwdriver in 1936. What does patented mean?
Correct Answer
D. Rights to make, use, and sell the innovation.
Explanation
The term "patented" refers to the legal rights granted to an inventor or innovator to exclusively make, use, and sell their invention or innovation. In this context, Henry F. Phillips obtained the rights to manufacture, use, and sell the Phillips screw and screwdriver through his patent in 1936. The term "patented" does not mean perfecting a process, another word for inventing, or starting the manufacturing process.
3.
The panel converts the Sun's energy into a DC electric current. Which of the following is not a similar word for 'convert'?
Correct Answer
A. Revolution
4.
Complete the missing words.
The integration of large numbers of tiny _________ into a small chip was an enormous improvement over the manual assembly of circuits using electronic components.
Correct Answer
B. transistors
Explanation
The integration of large numbers of tiny transistors into a small chip was an enormous improvement over the manual assembly of circuits using electronic components. Transistors are semiconductor devices that amplify or switch electronic signals and are essential components in modern electronic devices. By integrating a large number of transistors onto a small chip, it became possible to create more complex and powerful electronic systems, leading to advancements in technology and miniaturization. This advancement revolutionized the electronics industry and paved the way for the development of modern computers, smartphones, and other electronic devices.
5.
What does MES mean?
Correct Answer
D. Manufacturing execution system
Explanation
MES stands for manufacturing execution system. This system is used in manufacturing industries to track and control the production process in real-time. It collects data from various sources on the shop floor and provides insights into the status of production, inventory, and quality. MES helps in improving efficiency, reducing errors, and optimizing the overall manufacturing process. It provides visibility and control over the entire production process, from raw material to finished product, ensuring smooth operations and timely delivery.
6.
Another word for implementation is...
Correct Answer
C. Installation
Explanation
Implementation refers to the process of putting a plan or system into operation. Installation is a synonym for implementation as it involves the physical or technical process of setting up and making something operational, such as installing software or hardware. Integration refers to combining different parts or components into a whole, configuration refers to the arrangement or setup of something, and optimization refers to the process of making something as effective or efficient as possible. Therefore, installation is the most appropriate synonym for implementation.
7.
Which underlined word is false? Milling machines can perform a number of operations, some very complex, such as slot and keyway cutting, planing, drilling, diesinking, debating, and routing.
Correct Answer
D. Debating
Explanation
Debating is false. Rebating is correct, which means to separate with an instrument; "Cut the rope".
8.
How can I describe what's wrong with this part?
Correct Answer
A. It's cracked.
Explanation
The correct answer is "It's cracked." This answer describes the issue with the part being discussed. Cracking refers to the development of a break or fracture in the material, which can compromise its structural integrity and functionality. This explanation fits well with the given options and accurately identifies the problem.
9.
If a CAD engineer asks to see the 'blueprints', he is asking to...
Correct Answer
B. See the technical drawings.
Explanation
The term "blueprints" is commonly used to refer to the technical drawings or plans of a design or construction project. These drawings provide detailed information about the dimensions, specifications, and construction methods of the object or structure. Therefore, if a CAD engineer asks to see the "blueprints," they are likely requesting to view the technical drawings to gain a better understanding of the design and its specifications.
10.
AutoCAD DXF (Drawing Interchange Format, or Drawing Exchange Format) is a CAD data file format developed by Autodesk for enabling data interoperability between AutoCAD and other programs. The best antonym (or opposite noun) for 'interoperability' is.....?
Correct Answer
D. Incompatibility
Explanation
The best antonym for 'interoperability' is 'incompatibility'. Interoperability refers to the ability of different systems or software to work together and exchange information seamlessly. Incompatibility, on the other hand, refers to the lack of compatibility or the inability of different systems or software to work together effectively. Therefore, incompatibility is the opposite of interoperability.
11.
The image below is an electrical symbol for ________
Correct Answer
earth
ground
Explanation
The image shown represents the electrical symbol for earth or ground. This symbol is commonly used to indicate the connection to the Earth in electrical circuits. It is important to have a proper earth or ground connection to ensure safety and prevent electrical hazards.
12.
Corrosion is the wearing away of metals due to a chemical reaction.
Correct Answer
True
Explanation
Corrosion is indeed the wearing away of metals due to a chemical reaction. When metals are exposed to certain substances, such as moisture or acids, they can undergo a chemical reaction that causes them to deteriorate over time. This process is commonly observed in metals like iron, which can form rust when exposed to oxygen and water. Therefore, the statement "Corrosion is the wearing away of metals due to a chemical reaction" is accurate.
13.
To dismantle a machine means...
Correct Answer
B. To take it down.
Explanation
To take it down it a simple phrase that means to take the machine apart again.
14.
Which of the following is not a function of a vacuum gripper?
Correct Answer
A. It shines.
Explanation
The given answer "It shines" is not a function of a vacuum gripper because vacuum grippers are specifically designed to pick up objects and provide suction by creating a vacuum. The purpose of a vacuum gripper is to hold and manipulate objects using suction, not to emit light or shine.
15.
When we talk about the weight of an object, we are talking about....
Correct Answer
D. How heavy it is.
Explanation
The weight of an object refers to how heavy it is. Weight is a measure of the force exerted on an object due to gravity. It is determined by the mass of the object and the acceleration due to gravity. Height, width, and length are measurements of the size or dimensions of an object, but they do not directly determine its weight.
16.
Solar cells use _____ to turn light into energy.
Correct Answer
B. Semiconductors
Explanation
When light hits a solar cell, semiconductors such as silicon absorb the light and eventually transform it into an electrical current.
17.
When you combine P-type and N-type silicon in a solar cell:
Correct Answer
B. Electrons at the N-P junction eventually form a barrier.
Explanation
It may seem like all the free electrons from N-type silicon would make a mad dash for the available empty spaces in P-type silicon. In reality, the electrons near the borders of each type mix, gradually creating an effective barrier -- an electrical field.
18.
When light hits a solar cell, electrical current comes from:
Correct Answer
A. Electrons traveling from the N side to the P side along a circuit
Explanation
When sunlight hits a solar cell, it loosen electrons, creating both free electrons and spaces for the electrons to go. Add a path from N to P, and the electrons will follow it, creating an electrical current along the path.
19.
A solar cell can only absorb 15 to 25 percent of the sun's energy because...?
Correct Answer
A. Not all wavelengths of light create the right reaction in the cell.
Explanation
When a photon of light hits a solar cell, it can free an electron, simultaneously making a place for another electron to go. But if the photon doesn't have enough energy, nothing happens. On top of that, silicon isn't as efficient at moving electrons as a conductor.
20.
A typical photovoltaic array has 36 cells. If one is shaded, power production drops by...
Correct Answer
C. 50 percent
Explanation
If you put solar cells on your roof, it's important to make sure that the whole array gets full sun. If one cell is shaded, power output is cut in half.