Description : What is the phase relationship of the signal at the collector of Q2 to the signal at the collector of Q, A) 0° B) 90° C) 180° D) 360°.
Last Answer : C) 180°
Description : Number of degree a complete circle represents is A. 90° B. 180° C. 270° D. 360°
Last Answer : 360°
Description : In vibration isolation system, if ω/ωn, then the phase difference between the transmitted force and the disturbing force is A 0° B 90° C 180° D 270°
Last Answer : C 180°
Description : In vibration isolation system, if ω/ω n > 1, then the phase difference between the transmitted force and the disturbing force is A. 0° B. 90° C. 180° D. 270°
Last Answer : C. 180°
Description : In vibration isolation system, if ω/ω n , then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270°
Last Answer : c) 180°
Description : In vibration isolation system, if ω/ω n > 1, then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270°
Description : Back bearing of a line is equal to (A) Fore bearing ± 90° (B) Fore bearing ± 180° (C) Fore bearing ± 360° (D) Fore bearing ± 270°
Last Answer : (B) Fore bearing ± 180°
Description : An angle of deflection right, may be directly obtained by setting the instrument to read (A) Zero on back station (B) 180° on back station (C) 90° (D) 270° on back station
Last Answer : (A) Zero on back station
Description : A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion. (A) 60° (B) 90° (C) 180° (D) 270°
Last Answer : (B) 90°
Description : Which of the following circuit would be preferred for a 455 kHz IF amplifier? A) A resistance loaded B) Double tuned transformer C) Video amplifier D) Class C
Last Answer : B) Double tuned transformer
Description : An FET has a gate source bias of 2 V. The ac input signal is ± 1.2 V. The class of operation is A) A B) B C) C D) AB
Last Answer : D) AB
Description : An ideal voltage amplifier should have A) Ri = 0, R0 = 0 B) Ri = 0, R0 =∞ C) Ri = ∞, R0 = 0 D) Ri = ∞, R0 = ∞.
Last Answer : C) Ri = ∞, R0 = 0
Description : Which of the following methods cannot be used to increase the bandwidth for cascaded RF amplifier stages? A) Wave traps in each stage B) Stagger tuning C) A shunt damping resistor across each tuned circuit D) Doubled tuned transformers with tighter coupling
Last Answer : A) Wave traps in each stage
Description : A push pull amplifier balances out A) Odd harmonics B) Even harmonics C) Both odd as well as even harmonics D) Neither odd nor even harmonics.
Last Answer : A) Odd harmonics
Description : Which amplifier will be preferred for highest gain? A) Darlington's pair B) Cascade amplifier C) Cascode amplifier D) Depends on the circuitry
Last Answer : C) Cascode amplifier
Description : In an amplifier the collector voltage equals the full V+ of 28 V instead of the normal 12 V which of the following can be the trouble? A) RL is open B) Cc is open C) RE is open D) CE is shorted.
Last Answer : B) Cc is open
Description : In a resistance loaded amplifier, the gain decreases a high frequencies because A) Of decreasing reactance of the stray CT B) Increasing reactance of the stray CT C) Increasing reactance of CC D) Decreasing reactance of CC.
Last Answer : D) Decreasing reactance of CC.
Description : In a resistance loaded, RC coupled amplifier the dc component is blocked by A) Load resistance RL B) Coupling capacitor, CC C) RB D) The transistor.
Last Answer : B) Coupling capacitor, CC
Description : If the operating point of an NPN transistor amplifier is selected in saturation region, it is likely to result in A) Thermal runaway of transistor B) Clipping of output in the positive half of the ... for high dc collector supply D) Clipping of output in the negative half of the input signal
Last Answer : B) Clipping of output in the positive half of the input signal
Description : As compared to a CB amplifier, a CE amplifier has A) Lower current amplification B) Higher current amplification C) Higher input resistance. D) Both (B) & (C)
Last Answer : D) Both (B) & (C)
Description : What conditions are required for an amplifier to oscillate A) There must be feedback B) The feedback must be in phase C) The gain must be greater than the loss D) All the above are regd.
Last Answer : B) The feedback must be in phase
Description : Which of the following is not true: A) An oscillator is a circuit that converts DC to AC B) An oscillator is an amplifier that supplies its own input signal C) All oscillators generate sine waves D) In phase feedback is called positive Feedback
Last Answer : C) All oscillators generate sine waves
Description : The Bandwidth of an RC-coupled amplifier is limited by: A) coupling capacitors at the low frequency end and bypass capacitors at the high frequency end B) coupling capacitors at the high frequency ... at the low frequency end and bypass as well as coupling capacitors at the high frequency end.
Last Answer : C) bypass and coupling capacitors at the low frequency end and shunt capacitors at the high frequency end and
Description : ABCD is a regular parallelogram plot of land whose angle BAD is 60°. If the bearing of the line AB is 30°, the bearing of CD, is (A) 90° (B) 120° (C) 210° (D) 270°
Last Answer : (C) 210°
Description : In inverting amplifier, the phase difference between input and output voltages must be A. 30° B. 45° C. 90° D. 180°
Last Answer : 180°
Description : For non-inverting amplifier the input and output is A. out of phase B. in phase C. have phase difference of 180° D. have phase difference of 90°
Last Answer : in phase
Description : The change in base current will be A) 0.66 micro ampere B) 6.6 micro amperes C) 66 micro amperes D) 660 micro amperes.
Last Answer : A) 0.66 micro ampere
Description : Six (6) MHz crystal oscillator has a stability of 1 part in 106. The largest frequency error expected of this crystals A) 0.06 Hz B) 0.6 Hz C) 6 Hz D) 60 Hz.
Last Answer : C) 6 Hz
Description : In two stroke engine one power occurs in _______ of crank rotation A. 180° B. 360° C. 270° D. 720°
Last Answer : ANSWER : B
Description : In case of partial bearing, the angle of contact of the bushing with the journal is (A) 270° (B) More than 180° (C) Less than 180° (D) 360°
Last Answer : (C) Less than 180°
Description : The sum of the three interior angles of a triangle, the vertices of which lie on the surface of the earth, covering a vast area of several hundreds of sq kms, is : (a) Less than 180° (b) Equal to 180° (c) More than 180° but not less than 270° (d) More than 180° but not more than 225°
Last Answer : (d) More than 180° but not more than 225°
Description : Which distortion is least objectionable in case of audio amplifers? A) Phase distortion B) Frequency distortion C) Harmonic distortion D) Inter modulation distortion.
Last Answer : A) Phase distortion
Description : Which of the following contributes to harmonics distortion in amplifiers? A) Positive feedback B) Presence of noise C) Defective active device D) Non linearity in active device.
Last Answer : D) Non linearity in active device.
Description : A IGFET is a A) Linear device B) Square law device C) Half power device D) 3/2 power law device.
Last Answer : B) Square law device
Description : Which of the following combinations has no phase inversion of the signal? A) Two CE stages B) CE and CC stages C) Three CE stages D) CE stage and emitter follower.
Last Answer : A) Two CE stages
Description : The Darlington pair consists of the following two stages A) CE and CC B) Both C) Both CC D) CE and CB
Last Answer : C) Both CC
Description : Common base configuration is little used because A) It has low input impedance B) It has high input impedance C) It does not heat up D) It has very high gain.
Last Answer : A) It has low input impedance
Description : Foldback current limiting has the advantage of A) Better pass transistor protection for long term overloads B) A defined turn on point C) Circuit simplicity D) All of the above.
Last Answer : A) Better pass transistor protection for long term overloads
Description : A crow bar is a power supply circuit that provides A) Conventional current limiting B) Foldback current. limiting C) Temperature control D) Voltage limiting.
Last Answer : D) Voltage limiting.
Description : Current limited power supplies can prevent damage to A) Rectifier diodes and power transformers. B) Pass transistors C) Other circuits in the system D) All of the above.
Last Answer : D) All of the above.
Description : In general, MOV devices are used to protect electronic equipment from dangerous operating conditions such as A) High temperatures B) Line transients C) Over current D) All of the above.
Description : Load regulation is a measure of a power supplies ability keep a constant output under conditions of changing A) Line voltage B) Current demand C) Temperature D) Oscillator frequency.
Last Answer : A) Line voltage
Description : A series mode crystal is marked 10.000 MHz., It is used in a circuit that operates the crystal in its parallel mode. The circuit can be expected to A) Run below 10 MHz B) Run at 10 MHz C) Run above 10 MHz D) Not oscillate.
Last Answer : C) Run above 10 MHz
Description : An oscillator that uses crystal control should be A) Frequency stable B) useful only at low frequencies C) AVFO D) none of the above.
Last Answer : A) Frequency stable
Description : The major function of transistor. Q2 is A) It provides voltage gain B) It provides the feedback signal C) It isolates the oscillator from loading effects D) It provides a phase shift.
Last Answer : ) It provides a phase shift.
Description : The ideal characteristic of a voltage stablizer is A) constant output voltage with low internal resistance B) constant output current with low internal resistance C) constant output voltage with high internal resistance D) constant internal resistance with variable output voltage.
Last Answer : A) constant output voltage with low internal resistance
Description : If the whole circle bearing of a line is 270°, its reduced bearing is (A) N 90° W (B) S 90° W (C) W 90° (D) 90° W
Last Answer : (C) W 90°
Description : The degree measure of Prime Meridian is - (1) 90° (2) 180° (3) 0° (4) 360°
Last Answer : (3) 0° Explanation: A prime meridian is a meridian (a line of longitude) in a geographic coordinate system at which longitude is de fined to be 0°.
Description : What is the International Date Line? (1) It is the equator (2) It is the 0° longitude (3) It is the 90° east longitude (4) It is the 180° longitude
Last Answer : (4) It is the 180° longitude Explanation: The International Date Line (IDL) is an imaginary line on the surface of the Earth, that runs from the north to the south pole and demarcates ... Ocean, roughly following the 180° longitude but it deviates to pass around some territories and island groups.
Description : In case of full journal bearing, the angle of contact of the bushing with the journal is (A) 60° (B) 90° (C) 180° (D) 360°
Last Answer : (D) 360°