PCB Design Practice Test

Which of the following is a key aspect of expressions in the sum-of-products form?

A) The delay times are greatly reduced over other forms

B) All logic circuits are reduced to nothing more than simple AND and OR operations

C) The maximum number of gates that any signal must pass through is reduced by a factor of two

D) No signal must pass through more than two gates, not including inverters

Correct! Wrong!

Explanation:
The correct answer
All logic circuits are reduced to nothing more than simple AND and OR operations

You have a part that isn't up to par with the blueprint. Who is in charge of resolving the situation?

A) Quality Assurance Manager

B) Material Planner

C) Product Engineer

D) Supervisor

Correct! Wrong!

Explanation:
As long as manufacturing is involved, product engineers can work in practically any business. They usually work in manufacturing plants, where they supervise the production of a product.

What is the M16's standard ammo load?

A) 100 Rounds

B) 210 Rounds

C) 190 Rounds

D) 140 Rounds

Correct! Wrong!

Explanation:
The correct answer
210 Rounds

How many times should a weapon be subjected to quick action?

A) 1

B) 4

C) 5

D) 3

Correct! Wrong!

Explanation:
The correct answer
1

What are the sight picture's two essential elements?

A) Proper position, breathing

B) sight alignment, placing of the aiming point

C) steady aim, proper position

D) breathing, firing

Correct! Wrong!

Explanation:
The correct answer
sight alignment, placing of the aiming point

For the M16, what is the greatest effective range for a point target?

A) 1100 Meters

B) 1200 meter

C) 400 meters

D) 550 Meter

Correct! Wrong!

Explanation:
The correct answer
550 Meter

What is the Voltage Peak to Peak? According to the oscilloscope, Vpeak reads VA1= 10v and time reads T2-T1 = 10 ms.

A) 50v

B) 20v

C) 10v

D) 40v

Correct! Wrong!

Explanation:
The correct answer
20v

What is the word that is being used to describe this? "the number of times the waveform repeats itself in one second"

A) Frequency

B) Period

C) Amplitude

D) None of the above

Correct! Wrong!

Explanation:
The term "high frequency" refers to a type of printed circuit board used in devices that require the transfer of certain signals between objects. These PCBs typically have a frequency range of 500MHz to 2GHz.

Which of the following is a form of electrical energy that may be converted by an electric circuit?

A) Heat and Magnetism

B) Sound and Conductor

C) Conductor and Insulator

D) Magnetism and Lightning

Correct! Wrong!

Explanation:
The correct answer
Heat and Magnetism

Consider doubling the voltage and halving the resistance in a basic dc circuit. The current state of affairs will

A) stay the same as it was before

B) become half as great

C) become four times as great

D) become twice as great

Correct! Wrong!

Explanation:
The correct answer
become four times as great

Which of the following will happen if one of the ornament bulbs in a string of bulbs is shorted out?

A) The current in the string will go up

B) All the other bulbs will go out

C) The current in the string will stay the same

D) The current in the string will go down

Correct! Wrong!

Explanation:
The correct answer
The current in the string will go up

Consider three parallel resistors with values of 22 Ω, 27 Ω, and 33 Ω. What is the current drawn from a 12-volt battery when linked across this combination?

A) 1.5 A

B) 1.4 A

C) 15 mA

D) 150 mA

Correct! Wrong!

Explanation:
The correct answer
1.4 A

The resistance of a coil is 30 and the inductance is 0.5H. If the coil's current is 4 amps and the frequency is 50 Hz, then What is the inductive reactance going to be?

A) 157Ohms

B) 357Ohms

C) 457Ohms

D) 257Ohms

Correct! Wrong!

Explanation:
The correct answer
157Ohms

What is the M16's maximum effective range?

A) 4300 meter

B) 3500 meters

C) 3400 meters

D) 3600 meters

Correct! Wrong!

Explanation:
The correct answer
3600 meters

A series-parallel resistive network is frequently required by good engineering practice.

A) from a series combination of resistors in parallel but not from a parallel combination of resistors in series

B) from resistors that are all different

C) from a parallel combination of resistors in series, but not from a series combination of resistors in parallel

D) from resistors that are all identical

Correct! Wrong!

Explanation:
The correct answer
from resistors that are all identical

Which PCB name describes a thin photo-sensitive polymer that supports a photographic pattern of single traces or IC pads for etching?

A) Photo-resist

B) Prepreg

C) Solder mask

D) Etching

Correct! Wrong!

Explanation:
A photoresist (also known as a resist) is a light-sensitive substance that is used to generate a patterned coating on a surface in processes such as photolithography and photoengraving. In the electronic sector, this procedure is critical.

Which type of solderability testing is performed when a solder sample is generated by immersing a wire or sheet metal specimen in molten solder?

A) Solder Iron Testing

B) Solder Bath Testing

C) Meniscus Rise Testing

D) None of the above

Correct! Wrong!

Explanation:
The correct answer
Meniscus Rise Testing

Which of the following packages does not fall under the 'Small Outline Package' category?

A) SOP

B) SON

C) SO

D) SOT

Correct! Wrong!

Explanation:
The land pad is designed as a QFN/SON package on a substrate motherboard. On the bottom side of the QFN/SON packaging, lead fingers are visible. Soldering the component to the motherboard provides both electrical and mechanical connections.

Which of the following methods falls under the heading of In-circuit Testing?

A) Component Testing

B) Apply Signal and check output

C) Impedance Testing

D) All of the above

Correct! Wrong!

Explanation:
The correct answer
All of the above

According to the supply lines for ________, high current circuits are purposefully situated or placed near the border of the PCB.

A) Reduction of path length

B) Removal of heat

C) Isolation of stray current

D) All of the above

Correct! Wrong!

Explanation:
The correct answer
Removal of heat

Which of the soldering processes listed below is also known as 'High Frequency Resistance Soldering'?

A) Furnace Soldering

B) Electrical Soldering

C) Iron Soldering

D) Torch Soldering

Correct! Wrong!

Explanation:
The correct answer
Electrical Soldering

Which of the following assumptions is not a grounding consideration for ADC and DAC?

A) Digital side to digital ground

B) Use of separate power supply and connection of their ground leads to single point reference

C) Reduction of inductive loop area between power and return traces

D) Analog side to analog ground

Correct! Wrong!

Explanation:
The correct answer
Reduction of inductive loop area between power and return traces

Which phenomenon is not mitigated by low-impedance circuit lines, such as those provided by power and return planes for shielding purposes?

A) Convection

B) Crosstalk

C) Radiation

D) Noise

Correct! Wrong!

Explanation:
When heat is transmitted to fluids or air, convection occurs. Convection, unlike radiation, is totally direct and has a significant impact on overall PCB temperature.

Which of the following devices/equipments should be used to eliminate ground and supply line noise when constructing TTL/CMOS / ECL PCBs?

A) Snubber circuits

B) Coupling capacitor

C) Decoupling capacitor

D) None of the above

Correct! Wrong!

Explanation:
A decoupling capacitor, also known as a bypass capacitor, serves as an energy storage device.

What is/are the need(s) for precision differential amplifiers to be guarded?

A) To reduce capacitance between signal conductors & ground

B) To increase leakage resistance

C) A & B

D) None of the above

Correct! Wrong!

Explanation:
The correct answer
To reduce capacitance between signal conductors & ground
To increase leakage resistance