30 Propagation Delay MCQs with Answers

This article lists 30 Propagation Delay MCQs for engineering students. All the Propagation Delay Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, or interviews, or professionals who would like to brush up on the fundamentals of Propagation Delay.

Propagation delays must be focussed on by electrical engineers when creating ICs. Modern integrated circuits built have gates in billions and the speed of operation is incredible. If a delay of propagation in IC is inconsistent it causes race conditions as well as errors in data on the chip.

Propagation delays are considered an important aspect of designing high-speed circuits. It also limits the speed of processing at which the processor runs. It is also defined as the time acquired by components individually known as Logic gates; time taken for signals to be moved from a certain point to another one and in such situations, it is also referred to as Gate delay.

Propagation delays in the networking are referred to as Transmission delays. Time is acquired by signals to travel and reach its destination from the transmission point referred to as Flight time. The speed of the signal and the overall traveling distance are the main factors that form the overall delay of propagation.

Propagation delays are also dependent upon the type of logic families used. It can be either TTL (Transistor-transistor logic) or CMOS (Complementary Metal-oxide Semiconductor). These delays are measurable in picoseconds or nanoseconds.

1). Time required by signal to receive after it’s been sent is referred to as __________.

Time Delay

Phase Delay

Propagation Delay

Angular Delay

2). ______________ is focussed primarily in designing of electronic circuits.

Time Delay

Phase Delay

Propagation Delay

Angular Delay

3). What is the basic limit of the delay caused due to propagation?

Light Speed

Vacuum Speed

Gas speed

Water Speed

4). Propagation delays measurable in __________.

Nanoseconds

Picoseconds

Microseconds

a & b

5). What is the cause of data error on IC chips?

Time Delay

Phase Delay

Propagation Delay

Angular Delay

6). What is propagation delay called in networks?

Transmission Delay

Time of Flight

Gate Delay

a & b

7). Differences in __________of various logic gates leads to glitches in circuits.

Time Delay

Phase Delay

Propagation Delay

Angular Delay

8). Propagation delay increase with _____________.

Conductance

Inductance

Operating Temperature

Operating Voltage

9). What refers to Propagation delay in the logic gate?

Rise Time

Fall Time

a & b

None

10). Why do logic gates have propagation delays?

Inherent Capacitance

Inductance

Operating Temperature

Operating Voltage

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11). Bus lines with inserted repeaters reduce ________.

Time Delay

Phase Delay

Propagation Delay

Angular Delay

12). Propagation delay is __________.

Constant

Variable

Dynamic

Changeable

13). Technology node scaling gets degraded with _____________.

Time Delay

Phase Delay

Propagation Delay

Angular Delay

14). Propagation delay can be calculated as ___________.

Distance/Propagation Speed

Propagation Speed/ Length

Length/ Distance

Wavelength/ Medium Length

15). Are Propagation delay and frequency related?

Yes

Change in Frequency Cause Propagation Delay

Doesn’t Matter

Change in Frequency Proportional to Propagation Delay

16). Why do propagation delays occur in the cables?

Cable Strength

Too Long Cable

Too Short Cable

Cable is Thick

17). What are the components of FPGA Propagation delay?

Logic Delay

Routing Delay

Simulation Delay

a & b

18). What can be the Propagation delay range of Logic gates?

Nanoseconds

Picoseconds

Microseconds

Macroseconds

19). Propagation delays in PCB are based on __________.

Dielectric Constant

Geometry Trace

Component Used

a & b

20). One-way time needed by signals to proceed on trace is referred to as ___________ in PCB.

Logic Delay

Routing Delay

Simulation Delay

Propagation Delay

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21). Propagation delay doesn't depend on _________.

Packet Length

Link Transmission Rate

Transmission Medium

a & b

22). TTL has Propagation delay of _______.

10 ns

20 ns

30 ns

40 ns

23). Propagation delay of _________ affects the ripple counter speed.

Flip-flop

Gates

Flip-flops with Gates

Circuit Gates

24). Overall delay in propagation of Carry Save Adder is ___________.

Sum of Propagation Delays

Product of Propagation Delays

Dividing and Summing Up Delays

Sum of All Delays

25). What reduces Propagation delay in digital electronics?

Carry Save Adder

Carry Adder

Carry Look Ahead Adder

Full Adder

26). Full adder circuit employed with the fast gates can reduce ____________.

Time Delay

Phase Delay

Propagation Delay

Angular Delay

27). Sequential logic with long delay in propagation leads to _________.

Faster the Clock

Slower the Clock

Maximize Speed

Maximize Propagation Time

28). How propagation delays can be fixed in FPGAs?

Slow Down Clock Frequency

Break Logic Up into Stages

Fast the Clock Frequency

a & b

29). Given the following that has the least delay in propagation?

CMOS

DTL

TTL

RTL

30). What is the propagation delay of MOS family Logic gates?

2 ns

10 ns

12 ns

70 ns

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