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NAND gates are preferred over others because these can be used to make any gate.

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Varley loop tests are preferred over Murray loop tests because  (1) Valley loop test can locate open circuit fault (2) Varley loop test gives higher accuracy (3) in Varley loop test provision is made for the measurement of total loop resistance instead of obtaining it from the relation R = pl/a (4) Valley loop test can locate the earth fault

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
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TCXO is preferred over LC oscillator because • TCXO is more stable. • TCXO gives more power • TCXO is linear. • None of the above.

asked May 14, 2018 in Electrical Engineering by Shimroz123
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A FET is preferred over an ordinary transistor because it  1. Permits high degree of isolation between input & output circuits 2. Has low noise level 3. Has very high power gain 4. Has all the above properties 

asked May 13, 2018 in Power Electronics by Shimroz123
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RC triggering is preferred over resistance triggering because (A) it provides triggering at a precise instant (B) it gives a longer duration gate pulse (C) it enables triggering at a larger value of firing angle (D) it protects the SCR against high dv/dt

asked Apr 28, 2018 in Power Electronic Controlled Drives by Shimroz123
1 answer 37 views

Bulk power transmission over long HVDC lines is preferred because of

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
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Consider the following statements. Which of these statements are correct ?  (1) Reactance relays are preferred for ground fault relaying  (2) Impedance relays are most suitable for:protecting long transmission lines  (3) Mho relays are best suited for long transmission line protection  (4) Reactance relays are widely used for protection of Medium transmission lines  (A) All of them (B) (1) and (3) (C) (2) and (4) (D) (1), (2) and (4)

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 7 views

 For a NAND gate, when one or more inputs are low then the output will be A) Low B) High C) Alternately high and low D) High or low depending on relative magnitude of inputs 

asked Jun 17, 2018 in Digital Electronics by Shimroz123
1 answer 8 views

How many minimum number of NOR gates are required to realize a two-input X-OR gate?

asked May 24, 2018 in Digital Electronics by Shimroz123
1 answer 25 views
asked Mar 14, 2018 in Digital Electronics by Aishwarya
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The minimum number of NAND gates required to implement a XOR gate is  A) 5 B) 4 C) 3 D) 6

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
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Digital meters are superior over analogue meters because (A) less expensive (B) output reading is binary in nature (C) output impedance is less (D) installation is easy as panel meters 

asked Jun 4, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 8 views

Output of NAND gate is 0. for three inputs when:

asked May 24, 2018 in Digital Electronics by Shimroz123
1 answer 26 views

The output of a 2-input NAND gate with high at both the inputs will be • High • Low • High & low • None of the above.

asked May 14, 2018 in Digital Electronics by Shimroz123
1 answer 27 views
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What is the purpose of a NAND gate?

asked Dec 15, 2017 in Digital Electronics by Quiz
1 answer 39 views

In standard TTL gates, the totem pole output stage is primarily used to (A) increase the noise margin of the gate (B) decrease the output switching delay (C) facilitate a wired OR logic connection (D) increase the output impedance of the circuit

asked May 24, 2018 in Digital Electronics by Shimroz123
1 answer 18 views

The complete set of only those Logic Gates designated as Universal Gates is  (A) NOT, OR and AND Gates (B) XNOR, NOR and NAND Gates (C) NOR and NAND Gates (D) XOR, NOR and NAND Gates

asked May 18, 2018 in Digital Electronics by Shimroz123
1 answer 5 views

IC which has quad 2 input AND gates   (A) 7411 (B) 7404 (C)7400 (D) 7408

asked May 17, 2018 in Digital Electronics by Shimroz123
1 answer 17 views

Which of the following gates can be used to realize all possible combinational logic functions?  (i) OR gate (ii) NOR gate (iii) Exclusive OR gate (iv) NAND gate (v) AND gate  (A) (iii), (iv) and (v)  (B) (i), (iii) and (iv)  (C) (ii) and (iv)  (D) (i) and (v)

asked Apr 30, 2018 in Digital Electronics by Shimroz123
1 answer 18 views

Armature shunting method of speed control of dc shunt motor is preferred over annature resistance method due to:  (1) Better speed regulation (2) Less loss in external resistance (3) Simplicity in control circuit (4) Reduced cost of controller

asked Apr 9, 2018 in Electrical Engineering by Shimroz123
0 answers 42 views

Why is pulse train gating preferred over pulse gating? Explain with relevant circuit and waveforms, the pulse train gating of SCRs.

asked Mar 11, 2018 in Power Electronics by Quiz
1 answer 45 views

HVDC transmission is preferred to EHV AC because  (a) HVDC terminal equipments are inexpensive  (b) VAR compensation is not required in HVDC systems  (c) System stability can be improved  (d) Harmonic problem is avoided 

asked May 13, 2018 in Electrical Engineering by Shimroz123
1 answer 12 views

In class-A amplifier conduction extends over 360° because the operating point.  1. Located near saturation point 2. Located at or near cut-off point 3. Located on load line 4. Located in the centre of load line 

asked May 13, 2018 in Amplifier by Shimroz123
1 answer 115 views

In a transmission line if booster transformers are to be used, preferred location will be  (A) At the receiving end (B) At the sending end (C) At the intermediate point (D) Anywhere in the line 

asked May 8, 2018 in Electric Power Transmission by Shimroz123
1 answer 15 views

 DC motors are still preferred for use in: -  a) Electric excavators steel mills and cranes b) Lathes and machine tools c) Flour mills and jaw crushers d) Paper industry

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
0 answers 350 views

Why thyristor are not preferred for inverter?

asked Mar 19, 2018 in Thyristor by Quiz
0 answers 74 views
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If a computer on the network shares resources for others to use, it is called  (1) Server (2) Client (3) Mainframe (4) none 

asked Apr 10, 2018 in Computer Engineering by Shimroz123
1 answer 37 views

As per Shannon’s channel capacity theorem, if samples are transmitted in ‘T’ seconds over a noisy channel which is bandlimited to ‘B’ Hz. The number of samples ‘n’ is given by (symbols/notations carry their usual meaning) A) B/T B) T/B C) 2BT D) BT/2 

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 14 views

Consider the following statements: Over head transmission lines are provided with earth wires: 1 . To protect the transmission line from direct lightning strike 2. To protect the transmission line insulation from the indirect lightning strike 3. To balance the line currents 4. To provide path for neutral current Which of these statement/s is/are correct? (1) 1 and 3 (2) 1 and 4 (3) 1 only (4) 2 on|y

asked May 22, 2018 in Electric Power Transmission by Shimroz123
1 answer 14 views

Transient stability studies of a power system are usually carried out over a time period of (A) two or more seconds (B) several time swings (C) time interval of first swing (D) sustained oscillations

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 15 views

 The advantage of synchronous motor over slip -ring induction motor are that it's (A) Power factor can be vaned (B) Speed can easily varied (C) Speed is independent of supply frequency (D) Rotor has two slip rings

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
0 answers 21 views

In a static over-current relay, inverse time characteristics are obtained by   (a) A differentiating circuit (b) An integrating circuit (c) A transistor amplifier (d) A transistor switch

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
1 answer 42 views

What are the advantages of CMOS over NMOS?

asked Mar 11, 2018 in VLSI Design by Quiz
1 answer 12 views

The third generation relays - digital relays - are the basis of distribution system automation because of their: a. Self fault diagnostic capabilities b. Computing capabilities c. Easy interface for remote communication d. All of the above

asked Sep 1, 2018 by Shimroz123
0 answers 96 views

The ‘transportation delays’ occurring in distribution system are detrimental to stability because they produce (a) attenuation (b) phase lag (c) both (a) and (b) (d) transients 

asked May 25, 2018 in Electric Power Distribution by Shimroz123
1 answer 53 views

Normally, the FPGA resources are used less than 70% because:  a. Routing becomes excessively complicated b. Power issues c. Clock frequency d. Simulation time increases

asked May 17, 2018 in Embedded System Design by Shimroz123
1 answer 11 views

Most of the transistors are NPN type and not PNP type because  1.NPN transistor gives large voltage gain 2.NPN transistors are more negative than PNP transistors 3.In NPN transistor, the current conduction is by free electrons which are less mobiles than holes 4.We can have high conduction is NPN transistors 

asked May 13, 2018 in Semiconductor by Shimroz123
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In dc machines, the armature windings are placed on the rotor because of the necessity for  (1) electromechanical energy conversion (2) generation of voltage (3) commutation (4) development of torque

asked May 1, 2018 in Electrical Machine by Shimroz123

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