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MCQOPTIONS
This section includes 9294 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 8751. |
To multiply a number by 8 in 8085 we have to use RAL instruction |
| A. | once |
| B. | twice |
| C. | thrice |
| D. | four times |
| Answer» D. four times | |
| 8752. |
IC (instruction cycle), FC (fetch cycle) and EC (executive cycle) are related as |
| A. | IC = FC - EC |
| B. | IC = FC + EC |
| C. | IC = FC + 2EC |
| D. | EC = IC + EC |
| Answer» C. IC = FC + 2EC | |
| 8753. |
When .4546 E 5 and .5433 E 7 are to be added in normalized floating point mode |
| A. | none of the numbers is changed to any other form |
| B. | .4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed |
| C. | .5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed |
| D. | both the numbers are changed and their exponents are made equal to 6 |
| Answer» C. .5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed | |
| 8754. |
Match the following: List I List II A.Synchro1.AmplifierB.Amplidyne2.ActuatorC.Servo3.CompensatorD.RC network4.Transducer |
| A. | A-1, B-2, C-3, D-4 |
| B. | A-4, B-3, C-2, D-1 |
| C. | A-3, B-2, C-4, D-1 |
| D. | A-4, B-1, C-2, D-3 |
| Answer» D. A-4, B-1, C-2, D-3 | |
| 8755. |
Match the following: List I List II A.Silicon1.is trivalentB.Arsenic2.rarely used as semiconductorC.Indium3.is pentavalentD.Germanium4.intrinsic semiconductor |
| A. | A-1, B-2, C-3, D-4 |
| B. | A-4, B-3, C-2, D-1 |
| C. | A-4, B-3, C-1, D-2 |
| D. | A-2, B-1, C-3, D-4 |
| Answer» D. A-2, B-1, C-3, D-4 | |
| 8756. |
During processing the instructions, data, intermediate results and final results in a computer are held in |
| A. | CPU |
| B. | ALU |
| C. | Primary memory |
| D. | Secondary memory |
| Answer» D. Secondary memory | |
| 8757. |
The reflection coefficient on a line is 0.2 45 . The SWR is |
| A. | 0.8 |
| B. | 1.1 |
| C. | 1.2 |
| D. | 1.5 |
| Answer» E. | |
| 8758. |
The velocity factor of a transmission line depends on |
| A. | temperature |
| B. | skin effect |
| C. | relative permittivity of dielectric |
| D. | none of the above |
| Answer» D. none of the above | |
| 8759. |
A loss less line of characteristic impedance Z0 is terminated in pure reactance of -jZ0 value. VSWR is |
| A. | 10 |
| B. | 2 |
| C. | 1 |
| D. | infinity |
| Answer» E. | |
| 8760. |
In a klystron amplifier the input cavity is called |
| A. | buncher |
| B. | catcher |
| C. | Pierce gun |
| D. | collector |
| Answer» B. catcher | |
| 8761. |
Match the following: List I (Circuit) List II (Characteristics) A.Darlington pair1.uses pnp and npn transistors used as power amplifierB.CB amplifier2.Voltage gain nearly 1 and high input impedanceC.Cascade amplifier3.low input impedance used for high frequency isolation |
| A. | A-1, B-2, C-3 |
| B. | A-2, B-3, C-1 |
| C. | A-2, B-1, C-3 |
| D. | A-3, B-1, C-2 |
| Answer» C. A-2, B-1, C-3 | |
| 8762. |
Match the following: List I (FET Parameters) List II (Typical Values) A.gm for JFET1.25 kWB.rd for JFET2.0.01 siemenC.rd for MOSFET3.0.5 mWD.gg for JFET4.10-8 siemen |
| A. | A-1, B-2, C-3, D-4 |
| B. | A-2, B-3, C-1, D-4 |
| C. | A-4, B-2, C-3, D-1 |
| D. | A-4, B-3, C-2, D-1 |
| Answer» C. A-4, B-2, C-3, D-1 | |
| 8763. |
Match the following: List I List II A.Word wrap1.interleaved execution of two or more programs by the same computerB.Client2.automatically moves a word to the next line if it does not fit in the current lineC.Multitasking3.an application receiving dataD.Landscape4.orientation of worksheet |
| A. | A-1, B-2, C-3, D-4 |
| B. | A-2, B-3, C-4, D-1 |
| C. | A-4, B-3, C-2, D-1 |
| D. | A-2, B-3, C-1, D-4 |
| Answer» E. | |
| 8764. |
MICR stands for |
| A. | Magnetic Ink Chart Receipt |
| B. | Magnetic Ink Character Recognition |
| C. | Magnetic Ink Chart Recognition |
| D. | Magnetic Ink Character Receipt |
| Answer» C. Magnetic Ink Chart Recognition | |
| 8765. |
8085 has 6 sign flags. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8766. |
JCOKE = 3JCOKE = JCOKE + 1GO TO (5, 8, 9, 11, 15, 16 18, 20) JCOKE.After the execution of above statement, the control is transferred to statement number |
| A. | 8 |
| B. | 11 |
| C. | 16 |
| D. | 20 |
| Answer» C. 16 | |
| 8767. |
As the frequency increases, the absorption of ground wave by earth's surface |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | either (a) or (c) |
| Answer» C. remains the same | |
| 8768. |
Binary number 1101.101 is equivalent to decimal number? |
| A. | 13.5 |
| B. | 13.75 |
| C. | 13.625 |
| D. | 13.875 |
| Answer» D. 13.875 | |
| 8769. |
The velocity of sound waves in air |
| A. | is constant at all temperatures |
| B. | varies directly as temperature |
| C. | varies inversely as absolute temperature |
| D. | varies directly as square root of absolute temperature |
| Answer» E. | |
| 8770. |
Consider the following statements The amplitude of an FM wave is constantFM is more immune to noise than AMFM broadcasts operate in upper VHF and UHF frequency rangesFM transmitting and receiving equipments are simpler as compared to AM transmitting and receiving equipments Which of the above are correct? |
| A. | 1, 2, 3, 4 |
| B. | 1, 2, 3 |
| C. | 2, 3, 4 |
| D. | 1, 3, 4 |
| Answer» C. 2, 3, 4 | |
| 8771. |
In a fascimile reproduction time to scan one line is 2 ms. If it has 4% blanking, the visible trace time is |
| A. | 1.92 ms |
| B. | 2.08 ms |
| C. | 50 ms |
| D. | 0.08 ms |
| Answer» B. 2.08 ms | |
| 8772. |
The range of a cordless telephone is about |
| A. | 1000 m |
| B. | 500 m |
| C. | 100 m |
| D. | 10 m |
| Answer» D. 10 m | |
| 8773. |
An earth mat for a communication tower consists of |
| A. | one or two radials extending from base of tower at a depth of about 5 cm below ground |
| B. | a large number of radials extending from base of tower at a depth of about 3 m |
| C. | a large number of radials extending from base of tower at a depth of about 30 cm |
| D. | none of the above |
| Answer» D. none of the above | |
| 8774. |
Degaussing in a picture tube means |
| A. | Adding magnetism in mask and mounting frame |
| B. | Removing residual magnetism in mask, shield etc... |
| C. | Increasing resistance of coils to decrease time constant |
| D. | Decreasing resistance of coils to increase time constant. |
| Answer» C. Increasing resistance of coils to decrease time constant | |
| 8775. |
It is desired that transmission line and load should match for a range of frequencies. The best method is |
| A. | to use a balun |
| B. | to use a single stub of adjustable position |
| C. | to use a double stub |
| D. | to use a broad band amplifier |
| Answer» D. to use a broad band amplifier | |
| 8776. |
Which of the following has the highest input impedance? |
| A. | CE |
| B. | CB |
| C. | CC |
| D. | Push pull |
| Answer» D. Push pull | |
| 8777. |
Signal to noise ratio of microphone is defined as the ratio of output when the sound pressure is __________ to the output in the absence of any sound signal. |
| A. | 0.5 Pa |
| B. | 0.2 Pa |
| C. | 0.1 Pa |
| D. | 0.01 Pa |
| Answer» D. 0.01 Pa | |
| 8778. |
Oscillator crystal is made of |
| A. | silicon |
| B. | germanium |
| C. | diamond |
| D. | quartz |
| Answer» E. | |
| 8779. |
Which of the following is not considered as a useful quantity in comparing noise performance of receivers? |
| A. | Noise temperature |
| B. | Noise figure |
| C. | Noise resistance |
| D. | Input noise voltage |
| Answer» E. | |
| 8780. |
In a cellular communication system, path loss between transmitter and receiver is due to |
| A. | scattering from building, trees, vehicles and other structure |
| B. | reason at (a) above and due to reflections from ground only |
| C. | reason at (a) and (b) above along with reflections from ionosphere only |
| D. | reasons at (a), (b) and (c) above along with loss due to surface wave phenomenon |
| Answer» C. reason at (a) and (b) above along with reflections from ionosphere only | |
| 8781. |
For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as |
| A. | 2E |
| B. | 3E |
| C. | 4E |
| D. | 6E |
| Answer» D. 6E | |
| 8782. |
In TV systems, equalising pulses are sent during |
| A. | horizontal blanking |
| B. | vertical blanking |
| C. | serrations |
| D. | horizontal retrace |
| Answer» B. vertical blanking | |
| 8783. |
A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is |
| A. | 16 |
| B. | 15 |
| C. | 8 |
| D. | 1 |
| Answer» C. 8 | |
| 8784. |
A tape recorder and deck are entirely similar. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8785. |
Assertion (A): SSB systems generally have duplex operationReason (R): SSB systems are generally used in two way communication. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is correct but R is wrong |
| D. | A is wrong but R is correct |
| Answer» C. A is correct but R is wrong | |
| 8786. |
The characteristic impedance of a twin wire feeder used for TV signals is about |
| A. | 1000 ohm |
| B. | 500 ohm |
| C. | 300 ohm |
| D. | 100 ohm |
| Answer» D. 100 ohm | |
| 8787. |
The main function of a balanced modulator is to |
| A. | produce balanced modulation of a carrier wave |
| B. | produce 100% modulation |
| C. | suppress carrier signal in order to create a single-sideband or double sideband |
| D. | limit noise picked by a receiver |
| Answer» C. suppress carrier signal in order to create a single-sideband or double sideband | |
| 8788. |
In a FM receiver, amplitude limiter |
| A. | amplifiers low frequency signals |
| B. | reduces the amplitude of signals |
| C. | eliminates any change in amplitude of received FM signals |
| D. | none of the above |
| Answer» D. none of the above | |
| 8789. |
The maximum power output of a standard A earth station over the total band allocated to satellite communication is about |
| A. | 0.5 kW |
| B. | 8 kW |
| C. | 20 kW |
| D. | 50 kW |
| Answer» B. 8 kW | |
| 8790. |
A buffer amplifier is |
| A. | a double-tuned amplifier |
| B. | a high gain D.C. amplifier |
| C. | a cathode follower stage |
| D. | none of the above |
| Answer» C. a cathode follower stage | |
| 8791. |
Leak type bias is used in plate modulated class C amplifier to |
| A. | increase the bandwidth |
| B. | prevent over modulation |
| C. | prevent excessive grid current |
| D. | prevent tuned circuit damping |
| Answer» D. prevent tuned circuit damping | |
| 8792. |
The direction of rotation of a CD is |
| A. | clockwise |
| B. | anticlockwise |
| C. | clockwise or anticlockwise depending on frequency of data stored |
| D. | mostly anticlockwise but some times clockwise |
| Answer» C. clockwise or anticlockwise depending on frequency of data stored | |
| 8793. |
Skip distance depends on time of day and angle of incidence. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8794. |
In practical commercial FM system, channel bandwidth is |
| A. | 150 kHz |
| B. | 100 kHz |
| C. | 88 MHz |
| D. | 108 MHz |
| Answer» B. 100 kHz | |
| 8795. |
In EM waves, polarization |
| A. | is always vertical in an isotropic medium |
| B. | is caused by reflection |
| C. | is due to transverse nature of waves |
| D. | results from longitudinal nature of waves |
| Answer» D. results from longitudinal nature of waves | |
| 8796. |
PAM stands for |
| A. | Pulse Analogue Modulation |
| B. | Phase Analogue Modulation |
| C. | Pulse Amplitude Modulation |
| D. | Phase Amplitude Modulation |
| Answer» D. Phase Amplitude Modulation | |
| 8797. |
In case of low level amplitude modulation system, the amplifiers following the modulated stage must be |
| A. | class C amplifiers |
| B. | linear devices |
| C. | non-linear devices |
| D. | harmonic devices |
| Answer» C. non-linear devices | |
| 8798. |
An audio signal (say from 50 Hz to 10000 Hz) is frequency translated by a carrier having a frequency of 106 Hz. The values of initial (without frequency translation) and final (after frequency translation) fractional change in frequency from one band edge to the other are |
| A. | 200 and 1.01 |
| B. | 200 and 10.01 |
| C. | 200 and 100.1 |
| D. | 200 and 200 |
| Answer» B. 200 and 10.01 | |
| 8799. |
Under ordinary circumstances, impulse noise can be reduced in |
| A. | FM only |
| B. | AM only |
| C. | both AM and FM |
| D. | none of the above |
| Answer» B. AM only | |
| 8800. |
FM transmitting and receiving equipment as compared to AM equipment is |
| A. | costly |
| B. | cheaper |
| C. | almost equally costly |
| D. | none of the above |
| Answer» B. cheaper | |