PCB Design MCQ Questions Answers

What is PCB Design?

A PCB (Printed Circuit Board) is a board that has been designed to be used in the electronic industry. A PCB can be made of many different materials, but it always consists of layers of conductive material and insulating material. The conductive layer forms the circuit paths which are connected with each other by using vias. The insulating layer provides protection for the circuit path from any damage or shorting. Quizack is a platform from which you can get the best and the most important PCB questions and answers for the preparation for your examination or interviews. 

The design process of a PCB starts with an idea about what kind of product you want to create. This could be anything like a simple LED light bulb or something more complex such as a computer motherboard. After this, your idea will be turned into a schematic diagram. From there, you will need to draw out the layout of the PCB on paper. Next, you will have to decide if you want to use a software program to help you make your PCB or if you would rather do it manually. Once you have created your PCB, you will need to test it to ensure that everything works properly. Finally, after all these steps, you will need to send your PCB off to be manufactured.

What is supply line noise?

Supply line noise is a common issue with PCB design. It can cause signal interference and degrade the performance of your circuit. There are several ways to minimize supply line noise, including careful layout design, good component selection, and shielding. By following these tips, you can help keep your circuit running smoothly and avoid any costly mistakes.

What is electrical soldering?

Electrical soldering answer:

It involves the joining of two or more pieces of metal by melting a small amount of solder and then cooling it to solidify the joint. The solder used in this process can be made from tin, lead, silver, bismuth, indium, antimony, and other metals. Electrical Soldering is one of the most important processes in PCB design. It is also an essential part of the manufacturing process for printed circuit boards (PCBs). That concludes the electrical soldering answer.

What are the stated soldering methods?

There are three below stated soldering methods:

• reflow soldering
• manual soldering
• selective soldering

What is a solder mask?

Solder Mask Answer:

It is a thin film that protects copper traces from oxidation and other damage during soldering. It can be applied to PCBs by screen printing, stenciling, or dispensing methods. The most common method of application is silk screening which uses an ink-like paste made up of a resin binder with conductive particles (usually silver) suspended in it.

It's used for all kinds of applications including protecting components on boards like resistors, capacitors, etc. So that concludes the solder mask answer.

How to avoid replacement oriented difficulties?

To avoid replacement oriented difficulties:

There are a few things to remember when designing your PCB to avoid replacement oriented difficulties.

• Keep part placement and routing as simple as possible. This will make it easier to change or replace components if needed.
• Use standard footprints for components whenever possible. This will help ensure that replacement parts are readily available.
• Use clearly labeled connectors and component pins. This will make it easier to identify and connect replacement parts.
• Place key components near the edges of the PCB. This will make them easier to access if they need to be replaced.
• Make sure all electrical connections are secure and properly insulated. This will help prevent shorts and other electrical problems.

By following these simple tips, you can remove replacement-oriented difficulties. If a component does need to be replaced, it will be much less of a hassle. We have an extensive selection of PCB design interview questions for all those applicants who want to pass any initial test or interview. Quizack is a great hub of knowledge that facilitates all the candidates very preciously. 

What is solder iron testing?

Solder iron testing is a process that involves the use of a soldering iron to test for continuity between two points on your PCB. This can be done in order to check if there are any shorts or opens within the circuit, and also to make sure that all components have been correctly placed. It’s important to note that this method is not recommended for production boards as it could damage them!

What is high frequency resistance soldering?

High Frequency Resistance Soldering (HFRS) is a method of joining electronic components to circuit boards using solder paste, which contains flux and silver particles, as the medium for the joint. This process has been used since the early 1960s in printed circuit board assembly. The advantage of this technique over other methods such as wave soldering or reflow soldering is that it does not require any heating equipment. It uses the heat from an infrared lamp to melt the solder paste and create a strong bond between the component leads and the copper traces on the circuit board.

The main disadvantage of HFRS is that it requires precise control of the temperature at which the solder melts. If the solder is too hot, it can damage the circuit board; if it is too cold, the joints may be weak. In addition, the solder paste must be carefully applied to ensure that all areas of the circuit board are covered with a uniform thickness of solder.

What is solder bath testing?

Solder bath testing is a process that allows you to test your PCB design before it goes into production. It’s an important step in the manufacturing process for many reasons, but here are three of them:

• It helps eliminate defects before they get to market. If you have any issues with your board, you can fix them before they go out and cause problems for your customers. This saves time and money on rework.
• It gives you confidence when designing your next project. You know what works and what doesn’t work so you don’t waste time or resources trying something new.
• It allows you to see how well your components will perform under real-world conditions. You can use this information to make changes to your product if necessary.

What is a small outline package?

The term "small outline package" (SOP) refers to a type of integrated circuit that has been designed using surface mount technology (SMT). The small outline package is usually used for high-density, high-speed, and low-power applications. Small outline package has become increasingly popular in recent years because they can be mounted on printed circuit boards with automated equipment. That concludes the answer to the small outline package.

Why PCB requires minimum soldering?

The PCB requires minimum soldering because it is the most important part of any electronic device. It connects all components together and provides a safe environment for them to work in. However, PCB requires minimum soldering and is not just about connecting things together; it also needs to be designed properly so that it can withstand the rigors of everyday use. If you don’t design your board correctly, it may fail prematurely or even cause damage to other parts of your product. A huge amount of PCB objective questions is available on Quizack from which you can take benefit and improve your knowledge skills as well. 

What is PCB Design specified assertions also give below specified assertions?

PCB Design specified assertions are a set of design rules that must be followed during the PCB design process. They are used to ensure that the PCB is designed correctly and functions as intended. Quizack solves all of the PCB design queries for you specially and gets you to your required results.  

Here are below specified assertions:

• The board size must not exceed the maximum dimensions
• The board must be divided into a number of regions, each with its own unique set of electrical properties
• The traces and vias must be placed within the designated regions
• The traces must be of the correct width and thickness
• The clearance between traces and other objects must be maintained etc.

What are precision differential amplifiers?

Precision differential amplifiers are circuits used to amplify the difference between two input signals. They are often used in precision measurement applications, where the slightest difference in the signal levels must be accurately reproduced. Differential amplifiers can be built using a variety of different circuit topologies, but all share the same basic principle of operation.

What do you mean by single point reference?

A single point reference (SPR) is a specific location on a printed circuit board (PCB) that is used as a common reference for all other measurements. By having a single point that is known to be accurate, it becomes easier to ensure that all other measurements on the PCB are also accurate. 

What is a thin photo sensitive polymer?

A thin photo sensitive polymer is a material that can be used to create a printed circuit board. This type of polymer is sensitive to light and can be used to create the traces and pads that make up a PCB.

Which is most important step in circuit testing?

Designing a Printed Circuit Board (PCB) is an important first step in circuit testing. The PCB provides the structure and electrical connections for the entire circuit. If the PCB is not designed correctly, it can cause failures in the circuit.

What are traces, define traces answer in minimum words?

They are used to connect components together, and they can be either a signal or ground connection. If you have an LED connected to pin 1 of your microcontroller, then the trace connecting it to the other pins is a signal trace. The trace connecting the separate power supply to the microcontroller is a ground trace. That concludes the traces answer.

What is component testing?

Component Testing is the process of verifying that a product meets its specifications and quality standards, including performance, reliability, safety, durability, and appearance. It’s also called “component inspection” or “product inspection.”

In order to ensure that your PCB design will work as expected, you need to test it before manufacturing. There are many different types of tests that can be performed on your PCB:

• Functional Tests
• Physical Tests
• Electrical Tests
• Environmental Tests
• Mechanical Tests

What is meniscus rise testing?

Meniscus rise testing is a method used to determine the maximum amount of solder paste that can be applied to a circuit board without causing the solder joints to crack or delaminate from the board. The term “meniscus” in meniscus rise testing refers to the shape of the solder joint as it rises above the surface of the board, and the term “rise” refers to the height of this shape.

The purpose of meniscus rise testing is to ensure that the solder joints on your printed circuit boards will not fail when subjected to thermal cycling (repeated heating and cooling) during manufacturing processes such as reflow soldering, wave soldering, and hot air re-flow soldering.

What is Impedance Testing?

Impedance testing is a method of measuring the electrical resistance between two points on an electronic circuit board. The purpose of this test is to determine if there are any open or short circuits in the circuit, and to measure the resistance (ohms) of each component in the circuit. This information can be used by the designer to ensure that components have been properly placed and connected, as well as to help identify problems with the design itself.

What is Furnace Soldering?

The term “furnace soldering” refers to the use of a vacuum chamber or other kind of enclosure in which the components are placed inside and heated until they melt. The melted solder is then cooled down with a fan blowing air over them. This method is used for joining many different types of materials including:

• Electronics parts like resistors, capacitors, and transistors
• Wires
• Connectors
• Circuit boards
• Other small items that can be easily damaged if exposed to high temperatures

What is grounding consideration?

Grounding is one of the most important aspects of PCB design. It ensures that the signals on the PCB are properly routed and that any noise or interference is kept to a minimum. There are several grounding consideration that needs to be taken into account during PCB design, including:

• The layout of the ground plane
• The location of ground pins
• The use of vias and other ground connections
• The routing of signal traces

Grounding is especially important in high-speed or high-power applications, where any noise or interference can cause errors or damage to the PCB. By following the grounding considerations listed above, you can ensure that your PCB is properly grounded and that your signals are properly routed.

What are supply lines?

Supply Lines: The Supply Line is a path that carries electrical current from the power source to the circuit components. In most cases, it will be through copper wire or some other conductor. It can also be through aluminum foil or plastic film.

The supply line must carry enough current for all of the devices in your design. If you have several LEDs connected in series, they should share the same amount of current as one LED. For example, if each of two LEDs requires 1 amp of current and there are four LEDs in total, then the supply line must be able to deliver 4 amps.

What do you mean by iron soldering?

Iron soldering is a technique used to attach one or more components to a printed circuit board (PCB). A small amount of molten solder is deposited on the component leads and then the PCB is placed in position. The solder will flow onto the PCB pads, forming a strong bond between the component and the PCB.

What is torch soldering?

Torch Soldering is the process of using a metal tip to heat up and melt solder, which then flows into the joint between two parts. This can be used for many different types of joints including:

• Joints with very little space (e.g. through-hole)
• Joints where there are tight tolerances (e.g. surface mount)
• Joint that need to be heated from both sides (e.g. SMD)

The main advantage of this method is that it does not require any flux or cleaning agents. The downside is that you have to use a torch to do the heating, so you will need some sort of power source.

What is a sheet metal specimen?

A sheet metal specimen is the part of a PCB that is used to test the solderability of your printed circuit board assembly. The specimen must be made from the same material as the rest of the PCB, and it must have holes drilled through it in order for you to insert probes into the holes. These holes are called “test points”.

What is a solder sample?

A solder sample is an electronic component that has been tested to ensure it will function properly when soldered onto your PCB. It’s a good idea to have one or two of these on hand, especially if you are designing for the first time. You might also want to keep some around in case something goes wrong with your design and you need to test it again.

What is a crosstalk answer?

Crosstalk answers are used to describe the coupling between two signals on adjacent tracks. In the crosstalk answer, the signal on one track will affect the other, but not vice versa. This can be caused by capacitive or inductive coupling between the tracks.

What is a supporting photographic pattern?

The term Supporting Pattern means that you are using a different layer for your ground plane than the one you use for signal traces. In other words, if you're designing a board with two layers of copper on both sides, you would have a ground plane on one side, and signal traces on the other. The ground plane can be any shape or size, but it must cover all areas where there will be signals (i.e. not just around components). If you want to use a smaller ground plane so that more space is available for signal traces, then you would need to create a second layer of copper that covers only those parts of the board where you do not want signals. This layer would be called the Supporting Pattern.

What is increase leakage resistance?

There are a few factors that can influence leakage resistance in a PCB design. One of the most important is the choice of materials used in the design. Different materials have different levels of resistance to electrical current flowing through them, so it's important to choose the right ones for your application. 

What are circuit paths?

A circuit path is a conductor that connects two or more points in a electrical circuit. There are many types of conductors, but the most common type used in PCB design is copper. Other metals, such as aluminum and gold, are also used, but they are not as common because they are more expensive.

What is molten solder?

Molten solder is a liquid metal alloy that has been heated to a temperature of about 400 degrees Celsius (750 degrees Fahrenheit). The melting point for lead-based solder is 183 degrees Celsius (360 degrees Fahrenheit) and the melting point for tin-lead based solder is 232 degrees Celsius (450 degrees Fahrenheit). When molten, solder will flow over any surface it contacts. It can be used as an adhesive or soldering material. Molten solder is also called “molten flux” because it contains some type of chemical activator such as rosin. This chemical activator helps make the solder more conductive by dissolving oxides on metals.

What are ground leads?

The ground lead is a wire that connects the power supply to your circuit board and grounds it to the chassis of the PCB. Grounding the PCB provides protection from static electricity, which can damage sensitive components on the board. The ground lead also helps prevent noise or interference from outside sources from affecting the operation of the circuit.

Ground leads are typically made of copper, but other materials such as aluminum may be used depending on the application. Some high-speed designs use gold plated ground leads for better performance.

What is inductive loop area?

The inductive loop area (ILA) of a PCB design is the total area of all loops and tracks that are connected to the power supply or ground planes. The ILA is an important parameter for determining how much current can be drawn from the separate power supply, as well as how much noise will be generated by the circuit.

In addition to specifying the size of the PCB itself, it's also necessary to specify the amount of copper required for each layer. This includes the trace widths and spacing, as well as the thickness of the dielectric material between layers.

Quizack and PCB Design field:

Quizack created hundreds of PCB design questions and also maintained its standards by keeping these MCQs latest and updated. Whenever you want to learn PCB Design you can always come to Quizack for the best and most effective learning. Quizack didn't put any time limit on practicing so you can practice as much as you want.

Quizack created an online PCB design questions and answers test. So when you have enough practice and you think you know much about PCB Design you can test yourself by attempting Quizack's pcb quiz.

Quizack also prepared a PCB design questions pdf for our users who have problems maintaining internet connection or are always on the move or traveling. With these pdfs you can learn without any worries. You can get Quizack's PCB questions and answers pdf whenever you want.