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Which of the following represents the valid integer number in 'C'? 

A) 1500 B)1.1 C) 2-5 D) 0.123

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1 answer 10 views

Which of the following statements is not valid in case of conductors in electrostatic fields? A) The static electric field intensity inside a conductor is zero B) The static electric field intensity at the surface of a conductor is everywhere directed normal to the surface C) The conductor surface is an equivalent potential surface D) None of the above

asked Jun 17, 2018 in Electrical Engineering by Shimroz123
1 answer 10 views

Which of the following interface represents a collection of associated keys and values?  A) this B) Eventargs C) params D) IDictionary

asked Apr 11, 2018 in Computer Engineering by Shimroz123
1 answer 13 views

For a single phase capacitor start induction motor, which of the following statements is valid?  A) The capacitor is used for power factor improvement B) The direction of rotation can be changed by reversing the main winding terminals C) The direction of rotation cannot be changed D) The direction of rotation can be changed by interchanging the supply terminals

asked May 17, 2018 in Induction Machine by Shimroz123
1 answer 12 views

In transformers, which ofthe following statements is valid?  A) In an open circuit test, copper losses are obtained while in short circuit test, core losses are obtained B) In an open circuit test, current is drawn at high power factor C) In a short circuit test, current is drawn at zero power factor D) In an open circuit test, current is drawn at low power factor

asked May 17, 2018 in Transformer by Shimroz123
0 answers 20 views

Which of the following capacitors are used in D.C. circuits ? (a) Mica (b) Air (c) Ceramic (d) Electrolytic 

asked May 25, 2018 in Capacitor by Shimroz123
0 answers 23 views

Which of the following is false for switch statement in C++?  (1) It uses labels instead of blocks (2) we need to put break statement at the end of the group of statement of a condition (3) we can put range for case such as case 1..3 (4) None of these

asked Apr 10, 2018 in Computer Engineering by Shimroz123
1 answer 29 views

Which of the following theorems enables a number of voltage (or current) source to be combined directly into a single voltage (or current) source. (1) compensation theorem (2) reciprocity theorem (3) superposition theorem (4) Millman's theorem

asked Apr 29, 2018 in Network Analysis by Shimroz123
0 answers 18 views

Which among the following is the equation for the number of independent loops for a network with n nodes and b branches?  (A) n-1 (B) b+n-1 (C) b-n+1 (D) b-n

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
0 answers 12 views

On Smith chart, the eccentric circle passing through the prime center represents (in Ohms)  A) R=0 B) R=1 C) Xc=0 D) R=infinity

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 14 views

Which of the following materials is used in the construction of thermistors? A) Pure metal B) Pure semiconductor C) Pure insulator D) Sintered mixture of metal oxides 

asked Jun 17, 2018 in Electronics Engineering by Shimroz123
1 answer 14 views

 In thermo-couple instruments, in which of the following is an emf caused if the junction of two wires of dissimilar metals is heated and the free or cold ends are connected to a milli-voltmeter? A) Kelvin effect B) Hot wire effect C) Seebeck effect D) Faraday effect 

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

Which of the following are true in the context of Manchester Coding Signaling ?  (A) It suppresses the DC component  (B) It suppresses the high frequency component  (C) Pulses are unit symbol wide  (D) Symbol “1” is represented by positive pulse

asked May 12, 2018 in Electronics Engineering by Shimroz123
0 answers 26 views

If the RF transmission is terminated in its Characteristic impedance Z, which of the following statements is wrong : a. The input impedance of transmission line becomes Zc. b. The transmission line acts as an infinite long transmission line. c. The VSWR becomes one d. The VSWR becomes infinite

asked Apr 12, 2018 in Electronics Engineering by Shimroz123
1 answer 11 views

In 8085 microprocessor with memory mapped I/O which of the following is true?  (1) I/O devices have 16 bit addresses (2) I/O devices are accessed during IN and OUT instructions (3) There can be a maximum of 256 input and 256 output devices (4) Logic operations can not be performed

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 28 views

Which of the following diodes is limited to the reverse-bias region in its region of operation?  (1) Schottky (2) Tunnel (3) Photodiode (4) Rectifier

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 12 views

The noise is more dominant in which of the following:  (1) PAM (2) PWM (3) PPM (4) FSK

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 31 views

Which one of the following statements is correct? Digital modulation techniques are used in satellite communication systems since:  (1) They are easier to handle (2) Large bandwidth utilization is possible (3) They have a higher spectral efficiency (4) They are less prone to interference

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 22 views

One of the following is not a valid statement: A) Fleming’s right hand rule is used to find out the direction of current in the conductor of a generator B) Fleming’s left hand rule is used to find out the direction of rotation of the armature of DC motor C) Ampere’s rule is used to find out the direction of lines of force around the wire carrying current D) Right hand thumb rule is used to find out the direction of counter current produced in the armature magnetic field

asked Jun 17, 2018 in Electrical Engineering by Shimroz123
1 answer 21 views

Which of the following quantity maintains the same direction whether a D.C. machine runs as a generator or as a motor a. Induced e.m.f. b. Armature Current c. Field Current d. Supply Current  

asked Sep 1, 2018 by Shimroz123
1 answer 18 views

The torque speed characteristic of a repulsion motor resembles which of the following d.c. motor characteristics  A) Separately excited B) Shunt C) Series D) Compound

asked May 17, 2018 in Electrical Machine by Shimroz123
1 answer 8 views

for the voltage built-up a self-excited D.C. generator, which of the following is not an essential condition.  1.there must be some residual flux  2.field winding mmf must aid the residual flux  3.total field circuit resistance must be less than t critical value  4.armature speed must be very high

asked May 13, 2018 in DC generator by Shimroz123
1 answer 13 views

Which of the following is not computer hardware? A. Printer B. CPU C. Monitor D. Antivirus  

asked Apr 12, 2018 in Computer Engineering by Shimroz123
0 answers 19 views

While selecting motor for an A.C which of the following characteristics is of great importance (1) Type of bearings (2) Type of enclosure (3) Noise (4) Arrangement for power transmission  

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
0 answers 8 views

Which of the following testing methods is a direct testing of D C machine?  (A) Swinburne's Test (B) Field Test (C) Hopkinson’s Test (D) Brake Test 

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
0 answers 17 views

For measuring the frequency of an unknown A.C. source. Which of the following device is necessary to obtain a standard waveform?  (A) Operational amplifier (B) Astable multivibrator (C) Schmitt trigger (D) Monostable multivibrator

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
1 answer 15 views

 The number of parallel paths in the armature winding of a 4 -pole, wave connected d.c. machine having 28 coilside is : -  a) 28 b) 14 c) 4 d) 2

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
0 answers 18 views

Recommended IiL (minimum input current when the input voltage represents logical zero) is minimum for the TTL family  A) LS B) ALS C) AS D) S

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 72 views

The number of cycles in which a high speed circuit breaker can complete its operation is  (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 14 views

The number of cross -points needed for 10 lines in a cross-point switch which is full duplex in nature and there are no self connection is  A) 100 B) 45 C) 50 D) 90

asked Apr 11, 2018 in Computer Engineering by Shimroz123
1 answer 50 views

Which of the following device is used for coupling microwave energy?  A) Resonator B) Waveguide C) Loop D) Antenna

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 38 views

 Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode 

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 20 views

Which of the following circuits converts any arbitrary waveform into square waveform? A) Hartley oscillator B) Schmitt trigger C) Differentiator D) RC phase shift oscillator 

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 22 views

Which one of the following is another name for common-collector amplifier?  A) Source follower B) Collector follower C) Base follower D) Emitter follower

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 22 views

Which of the following transducers can be used for non-contact temperature measurement? A) Resistance temperature detector B) Thermistor C) Sensistor D) Pyrometer 

asked Jun 17, 2018 in Electronics Engineering by Shimroz123
1 answer 6 views

Which of the following noise must be considered at high frequencies (microwave frequencies)? (1) Shot noise (2) Random noise (3) Impulse noise (4) Transit time noise

asked May 29, 2018 in Electronics Engineering by Shimroz123
1 answer 55 views

Which of the following are 3 byte instruction set ? (a) MV 1A, 32 H (b) JMP 2085 H (c) MOV C, A (d) ADD B 

asked May 26, 2018 in Electronics Engineering by Shimroz123
1 answer 13 views

Which of the following oscillators is used for generation of high frequency signal ? (a) RC phase shift oscillator (b) Blocking oscillator (c) Wein bridge oscillator (d) L-C oscillator 

asked May 26, 2018 in Electronics Engineering by Shimroz123
1 answer 16 views

Which of the following compensator will increase the bandwidth of the system: (1) Phase lag (3) Lag-Iead (2) Phase lead (4) None of these

asked May 22, 2018 in Electronics Engineering by Shimroz123
1 answer 16 views

For a series resonant circuit, at the half power points,which of the following is true?  (a) Current is half of the current at resonance. (b) Resistance is equal to the reactance. (c) The impedance is half the impedance at the resonance. (d) None of the above

asked May 16, 2018 in Electronics Engineering by Shimroz123
1 answer 4 views

Which of the following notations have two repetitions of zero ?  (P) 1’s complement with radix of number being 2  (Q) 7’s complement with radix of number being 8.  (R) 9’s complement with radix of number being 10.  (S) 10’s complement with radix of number being 10   Select the correct answer using the codes given below:   (a) P,Q and S (b) P and R (c) Q, R and S (d) P,Q and R

asked May 13, 2018 in Electronics Engineering by Shimroz123
1 answer 18 views

Which of the following does not show non-linear V-I characteristics? (A) Schottky diode (B) Tunnel diode (C) Thermistor, at a fixed temperature (D) p-n Junction diode.

asked Apr 26, 2018 in Electronics Engineering by Shimroz123
1 answer 14 views

For a rotameter, which one of the following statements is TRUE? (A) The weight of the float is balanced by the buoyancy and the drag force acting on the float (B) The velocity of the fluid remains constant for all positions of the float (C) The measurement of volume flow rate of gas is not possible (D) The volume flow rate is insensitive to changes in density of the fluid

asked Apr 26, 2018 in Electronics Engineering by Shimroz123
1 answer 9 views

Which of the following is the natural abrasive (A) Al2O3 (B) SiC (C) boron carbide (D) corundum  

asked Apr 23, 2018 in Electronics Engineering by Shimroz123
1 answer 13 views

Which of the following is only a power electronics component? (A) thyristor (B) diode (C) transistor (D) none of these 

asked Apr 23, 2018 in Electronics Engineering by Shimroz123
0 answers 80 views

Which of the following devices cannot be used as microwave oscillator : a. IMPATT diode b. PN Junction .diode c. TRPATT diode d. BARRITT diode

asked Apr 12, 2018 in Electronics Engineering by Shimroz123
1 answer 20 views

Which of the following is a Read Only Memory storage device? A. Floppy Disc B. Hard Disc C. CD ROM D. None of these

asked Apr 12, 2018 in Electronics Engineering by Shimroz123
1 answer 29 views

Which of the following semiconductor materials is (are) used for manufacturing solar cells?  (1) Gallium arsenide (2) Indium arsenide (3) Cadmium sulfide (4) All of these

asked Apr 9, 2018 in Electronics Engineering by Shimroz123

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