elex2

50問 • 1年前

問題一覧

What device from the thyristor family has its gate terminal connected to the n-type material near the anode? Select one:

PUT

Which of the following bits are used for setting the data frame size?

UCSZ0

Ladder logic programming consists primarily of:

Virtual relay contacts and coils

Which of the following buses are present in a microcontroller for transferring data from one place to another?

Address bus, data bus, control bus

In a bit-mapped I/O system each:

Byte is assigned an I/O address.

If the gain of the system is reduced to a zero value, the roots of the system in the s-plane:

Coincide with the poles

For either an RC low-pass or high pass filter,

Xc = R at the cutoff frequency.

The systematic reduction of logic circuits is accomplished by:

using Boolean algebra

The commutative law of addition and multiplication indicates that:

the way we OR or AND two variables is unimportant because the result is the same

What are the three terminals of a TRIAC?

Gate, anode 1, and anode 2.

The Static Induction Thyristor (SITH) is a:

3 terminal, self-controlled device

Which one of the following are correct? The root locus is the path of the roots of the characteristic equation traced out in the s-plane:

As a system parameter is changed.

The following switching functions are to be implemented using a decoder: f1 = m(1, 2, 4, 8, 10, 14) f2 = m(2, 5, 9, 11) f3 = m(2, 4, 5, 6, 7). The minimum configuration of decoder will be:

4 to 16 lines

Which of the following is not the feature of a modern control system?

No oscillation

How many R-S flip-flops would be required to construct an 8-bit storage register?

What is the name of the random-accessed semiconductor memory IC that must be refreshed periodically to maintain reliable data storage in its memory matrix?

DRAM - Dynamic Random-Access Memory.

With surface-mount technology (SMT), the devices should:

mount directly

What is the voltage range considered to be valid logic low input in a TTL device operating at 5 volts?

Zero to 0.8 volts.

The Static Induction Thyristor (SITH) has:

gate, anode, cathode

What is the difference between a 7400 and a 7411 IC?

7400 has four two-input NAND gates; 7411 has three three-input AND gates

When the microcontroller executes some arithmetic operations, then the lag bits of which of the following register are affected?

PSW

Which hardware triggers some operation after certain programmed count?

programmable interval timer

What will happen in that condition, if an interrupt occurs while the microcontroller is serving any other interrupt?

The interrupt that is more priority in the interrupt vector table will be served first.

Which among the following is not an advantage of an open loop system?

Requirement of system recalibration from time to time

Consider the loop transfer function K(s+6)/(s+3)(s+5), in the root locus diagram the centroid will be located at:

-2

In AVR, which of the following registers are there for the I/O programming of ports?

All of the mentioned

In the thyristor gating circuit, the supply to the pulse amplifier is provided by the:

isolation transformer

TTL inputs left open develop what logic state?

A high-logic state.

A differential amplifier has an open-loop voltage gain of 120. The input signals are 2.45 V and 2.35 V. Calculate the output voltage of the Amplifier.

12.0 V

What will be the output from a D flip – flop if the clock is low and D = 0?

No change

A single phase fully controlled bridge converter supplies a load drawing constant and ripple free load current, if the triggering angle is 30 degrees, what will be the input power factor?

0.65

A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):

Ex-OR gate

The thyristor turn-off requires that the anode current:

falls below the latching current

Which of the following should a microcontroller at-least should consist of?

CPU, RAM, I/O ports, and timers

If the RC firing circuit used for firing an SCR is to be used to fire a TRIAC then:

the diode should be replaced by a diac

In a negative-logic circuit, what level is used to represent a logic 0?

High level.

In case of a cosine firing scheme, __________ is used to get a cosine wave

an integrator circuit

HEMT based __________ have a spot-size convertor with a photodiode.

p-i-n photoreceiver

The Silicon Controlled Switch (SCS) can be turned on by two methods, by applying __________ and __________.

negative pulse to the anode gate, positive pulse to the cathode gate

The Static Induction Thyristor (SITH) is a:

p+ n+ diode with p+ electrodes

The natural reversal of ac supply voltage commutates the SCR in case of:

both line and natural commutation

If the poles or zeros are repeated, then the function is said to be having _________ poles or ________ zeros.

multiple, multiple

A commutator is a device fitted to a generator. Its function is:

To generate a direct current

Which network provides the greatest harmonic suppression?

Pi-L network

Which characteristic of IC in Digital Circuits represents a function of the switching time of a particular transistor?

Propagation delay

From the following list of devices, choose the device that only turns-on or a fixed-value of anode-cathode voltage

SUS

What converts the programs written in assembly language into machine instructions?

Assembler

The APT (automatically programmed tools) language is used with:

Numerical controlled machines

Which of the following bit/s of the status register that allows the microcontroller to operate in its low power mode?

CPU off

The Reverse Conducting Thyristor (RCT) has:

a diode in anti-parallel with the SCR

elex1

Loloysan · 50問 · 1年前

elex1

50問 • 1年前

Loloysan

ME1 & ME2_ ELEX

Loloysan · 100問 · 1年前

ME1 & ME2_ ELEX

ME1_Math

ME1_Math

Math2

Math2

ME1 & ME2_MATH

Loloysan · 100問 · 1年前

ME1 & ME2_MATH

rc2_elex

rc2_elex

rc3_elex

rc3_elex

geasME1

geasME1

geasME2

geasME2

GEAS_ME1 & ME2

Loloysan · 100問 · 1年前

GEAS_ME1 & ME2

est_ME1

est_ME1

est_ME2

est_ME2

est_ME1 & ME2

Loloysan · 100問 · 1年前

est_ME1 & ME2

100問 • 1年前

Loloysan

問題一覧

What device from the thyristor family has its gate terminal connected to the n-type material near the anode? Select one:

PUT

Which of the following bits are used for setting the data frame size?

UCSZ0

Ladder logic programming consists primarily of:

Virtual relay contacts and coils

Which of the following buses are present in a microcontroller for transferring data from one place to another?

Address bus, data bus, control bus

In a bit-mapped I/O system each:

Byte is assigned an I/O address.

If the gain of the system is reduced to a zero value, the roots of the system in the s-plane:

Coincide with the poles

For either an RC low-pass or high pass filter,

Xc = R at the cutoff frequency.

The systematic reduction of logic circuits is accomplished by:

using Boolean algebra

The commutative law of addition and multiplication indicates that:

the way we OR or AND two variables is unimportant because the result is the same

What are the three terminals of a TRIAC?

Gate, anode 1, and anode 2.

The Static Induction Thyristor (SITH) is a:

3 terminal, self-controlled device

Which one of the following are correct? The root locus is the path of the roots of the characteristic equation traced out in the s-plane:

As a system parameter is changed.

The following switching functions are to be implemented using a decoder: f1 = m(1, 2, 4, 8, 10, 14) f2 = m(2, 5, 9, 11) f3 = m(2, 4, 5, 6, 7). The minimum configuration of decoder will be:

4 to 16 lines

Which of the following is not the feature of a modern control system?

No oscillation

How many R-S flip-flops would be required to construct an 8-bit storage register?

What is the name of the random-accessed semiconductor memory IC that must be refreshed periodically to maintain reliable data storage in its memory matrix?

DRAM - Dynamic Random-Access Memory.

With surface-mount technology (SMT), the devices should:

mount directly

What is the voltage range considered to be valid logic low input in a TTL device operating at 5 volts?

Zero to 0.8 volts.

The Static Induction Thyristor (SITH) has:

gate, anode, cathode

What is the difference between a 7400 and a 7411 IC?

7400 has four two-input NAND gates; 7411 has three three-input AND gates

When the microcontroller executes some arithmetic operations, then the lag bits of which of the following register are affected?

PSW

Which hardware triggers some operation after certain programmed count?

programmable interval timer

What will happen in that condition, if an interrupt occurs while the microcontroller is serving any other interrupt?

The interrupt that is more priority in the interrupt vector table will be served first.

Which among the following is not an advantage of an open loop system?

Requirement of system recalibration from time to time

Consider the loop transfer function K(s+6)/(s+3)(s+5), in the root locus diagram the centroid will be located at:

-2

In AVR, which of the following registers are there for the I/O programming of ports?

All of the mentioned

In the thyristor gating circuit, the supply to the pulse amplifier is provided by the:

isolation transformer

TTL inputs left open develop what logic state?

A high-logic state.

A differential amplifier has an open-loop voltage gain of 120. The input signals are 2.45 V and 2.35 V. Calculate the output voltage of the Amplifier.

12.0 V

What will be the output from a D flip – flop if the clock is low and D = 0?

No change

A single phase fully controlled bridge converter supplies a load drawing constant and ripple free load current, if the triggering angle is 30 degrees, what will be the input power factor?

0.65

A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):

Ex-OR gate

The thyristor turn-off requires that the anode current:

falls below the latching current

Which of the following should a microcontroller at-least should consist of?

CPU, RAM, I/O ports, and timers

If the RC firing circuit used for firing an SCR is to be used to fire a TRIAC then:

the diode should be replaced by a diac

In a negative-logic circuit, what level is used to represent a logic 0?

High level.

In case of a cosine firing scheme, __________ is used to get a cosine wave

an integrator circuit

HEMT based __________ have a spot-size convertor with a photodiode.

p-i-n photoreceiver

The Silicon Controlled Switch (SCS) can be turned on by two methods, by applying __________ and __________.

negative pulse to the anode gate, positive pulse to the cathode gate

The Static Induction Thyristor (SITH) is a:

p+ n+ diode with p+ electrodes

The natural reversal of ac supply voltage commutates the SCR in case of:

both line and natural commutation

If the poles or zeros are repeated, then the function is said to be having _________ poles or ________ zeros.

multiple, multiple

A commutator is a device fitted to a generator. Its function is:

To generate a direct current

Which network provides the greatest harmonic suppression?

Pi-L network

Which characteristic of IC in Digital Circuits represents a function of the switching time of a particular transistor?

Propagation delay

From the following list of devices, choose the device that only turns-on or a fixed-value of anode-cathode voltage

SUS

What converts the programs written in assembly language into machine instructions?

Assembler

The APT (automatically programmed tools) language is used with:

Numerical controlled machines

Which of the following bit/s of the status register that allows the microcontroller to operate in its low power mode?

CPU off

The Reverse Conducting Thyristor (RCT) has:

a diode in anti-parallel with the SCR