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You Are On Multi Choice Question Bank SET 3260
163001. Answerback codes on telex working consists of:
(A): Telex number (B): Country of origin (C): Customer name (D): All the three
163002. The expanded form of ITU :
(A): International Telecommunication Union (B): Indian Telecom Union (C): International Telex Union (D): Indian Telex Union
163003. The symbol rate measurement on telex working is known as :
(A): Erlang (B): GOS (C): Baud (D): CCR
163004. People still use telex because :
(A): Multi media service is possible (B): Duplex mode of operation (C): Legally secure (D): (B) and (C )
163005. In telex transmission ++ indicates :
(A): End of transmission (B): End of transmission acknowledgement not required (C): End of transmission acknowledgement required (D): End of transmission you may trunsmit
163006. 50 baud or approximately :
(A): 300 words per minute (B): 66 words per minute (C): 200 words per minute (D): 33 words per minute
163007. Power consumption of Teleprinter motor is :
(A): 40 watts (B): 80 watts (C): 100 watts (D): 120 watts
163008. Radio telex system TT44 operate in :
(A): 60-72 MHz band (B): 40-52 MHz band (C): 30-42 MHz band (D): 50^62 MHz band
163009. Telex Exchange began in.Germany in :
(A): 1950 (B): 1890 (C): 1933 (D): 1901
163010. A teleprinter can be used to send and receive typed messages :
(A): point to point only (B): point to multipoint only (C): over various types of communications channels (D): all the above
163011. Choose the correct statement:
(A): Telex exchanges are Telephone Exchanges only (B): Telex exchanges can be used as Telephone Exchanges also (C): Only real time message transmission is possible in telex (D): Telex exchanges are entirely separate from the telephone system
163012. To confirm that the connection had remained unbroken during the message transmission in telex working:
(A): Sending Answer back code at the end (B): Sending Test code at the end (C): Sending Stop transmission at the end (D): Sending Who arc you code at the end
163013. Answerback codes consist of a :
(A): Set of 32 characters (B): Set of 20 characters (C): Set of 8 characters (D): Set of 16 character
163014. All space function in telex working used for :
(A): inserting a space between words (B): fault condition (C): returning to the beginning of a line (D): moving the paper to the next line
163015. Degree of distortion that a teleprinter will permit is termed as :
(A): teleprinter margin (B): teleprinter error (C): teleprinter tolerance, (D): teleprinter noise
163016. The intelligence for a 'Bell’ alarm contact facility is the figures case of the letter:
(A): D. (B): J (C): Y (D): S
163017. The intelligence for the 'Answer Back’ facility is the Figures case of letter :
(A): D (B): J (C): Y (D): S
163018. Standard 50 baud working, the time of transmission of 7 1/2 unit code is :
(A): 15 milliseconds ’ (B): 20 milliseconds (C): 150 milliseconds (D): 112.5 milliseconds
163019. Which one is incorrect?
(A): Telex Messages are legal documents unlike emails (B): Both sender and recipient of are Telex Messages formally identified (C): Banking and Financial Systems not using Telex Messages for trades and confirmations (D): Ocean going ships are required to have Telex Machines, as a safety requirement
163020. A telegraph speed of 75 bauds equals :
(A): 6 characters per sec (B): 6.6 characters per sec (C): 10 characters per sec (D): 7.5 characters per sec
163021. Of the 32 combinations key operations in telex, the function codes are :
(A): 26 (B): 6 (C): 30 (D): 2
163022. The ripple factor of a halfwave rectifier is________.
(A): 0.482 (B): 0.812 (C): 40.6 (D): 1.21
163023. Which of the following is tine fastest switching component ?
(A): MOSFET (B): JFET (C): BJT (D): pentode
163024. The final power amplifier in a radio transmitter station is usually _____.
(A): Class A (B): Class B (C): Class C (D): Class AB
163025. In AM radio receiver, the oscillator frequency is________.
(A): incoming signal - 455 kHz (B): incoming signal + 455 kHz (C): equal to signal frequency (D): equal to 455 kHz
163026. The voltage gain of an emitter follower configuration can not be more than_________.
(A): I (B): 0.5 (C): 10 (D): 100
163027. The doping concentration in zener diode is__________.
(A): verylow (B): very high (C): zero (D): infinity
163028. Binary number system uses_____________symbols.
(A): 16 (B): 10 (C): 8 (D): 2
163029. Trimmer is a variable___________.
(A): resistor (B): inductor (C): capacitor (D): none of these
163030. The number of turns in secondary of a___________transformer is more than the primary.
(A): step - down (B): step - up (C): 230 V to 6 V’ (D): 11 kV to 230 V
163031. In a PN junction diode the harrier potential offers opposition to_________
(A): Minority charge carriers in both regions (B): Majority charge camers in both regions (C): Holes in N region (D): Electrons in P region
163032. Negative feedback in amplifier___________the stability of its voltage gain.
(A): increases (B): decreases (C): does not affect (D): none of these
163033. The time-base of a CRO is______waveform.
(A): sawtooth (B): sine (C): square (D): rectangular
163034. Moving iron meter is usually used for measurement of_
(A): AC and DC (B): DC only (C): AC only (D): None of these
163035. Integrator is a........filter.
(A): high pass (B): low pass (C): band pass (D): band stop
163036. OP-AMP may be used as :
(A): summing amplifier (B): differentiator (C): voltage comparator (D): all the above
163037. The timer IC 555 is available in___________package.
(A): ^ pin (B): 14 pin DIP (C): 8 pin DIP (D): 16 pin DIP
163038. IGBT stands for_____________.
(A): Insulated Gate-Based Thyristor (B): Insulated Gate Bipolar Thyristor (C): Intrinsic Gate Bipolar Transistor (D): Insulated Gate Bipolar Transistor
163039. IC 7912 is
(A): Two input Quad XNOR gate (B): Two input Quad XOR gate (C): Negative voltage regulator for 12 V (D): Positive voltage regulator for 12 V
163040. In On-line UPS, the lottery is connected
(A): All the time to the inverter (B): During mains failure (C): During charging time only (D): All the above
163041. The program counter in 8085 microprocessor is of ________bit.
(A): 8 (B): 16 (C): 4 (D): 32
163042. Which of the following is a bidirectional device ?
(A): Zener diode (B): SCR (C): l.ED (D): Triac
163043. Henry is the unit of ___...
(A): Capacitance (B): Power (C): Inductance (D): Resistance
163044. A hall adder circuit can add _ bits at a time.
(A): 2 (B): 3 (C): 4 (D): 1
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