This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Landline Telemetry”.
1. Medium of transmission in landline telemetry may be _______________
a) Electrical line
b) Pneumatic line
c) Electrical and pneumatic line
d) None of the mentioned
View Answer
Explanation: Direct data transfer over an electrical or pneumatic line is known as land line telemetry.
2. Which of the following is correct for electrical line telemetry?
a) Transmission of electrical voltage
b) Transmission of electrical current
c) Transmission of analog signal
d) All of the mentioned
View Answer
Explanation: Electrical line telemetry consist of transmission of electrical voltage or current waves in analog form.
3. Feedback type telemetry systems are possible.
a) True
b) False
View Answer
Explanation: Feedback type telemetry systems or closed loop telemetry systems are used for providing a higher degree of accuracy, less error etc.
4. What happens to the linearity of the telemetry system when feedback is applied?
a) Increases
b) Decreases
c) Nothing happens
d) None of the mentioned
View Answer
Explanation: An increased rate of linearity is seen when feedback is applied.
5. Amplitude of data from pulse telemetry will be _______________
a) Cannot retrieve amplitude data
b) Pulse characteristics
c) Number of pulses
d) None of the mentioned
View Answer
Explanation: In pulse telemetry, any one of the parameters of a pulse represents the amplitude of data.
6. Pulse encoding is important in digital telemetry.
a) True
b) False
View Answer
Explanation: Pulse encoding of a sampled signal is an important step in digital telemetry.
7. Power transmission in telephone lines are ___________________
a) Open loop telemetry
b) Closed loop telemetry
c) May be open loop or closed loop
d) None of the mentioned
View Answer
Explanation: Power transmission in telephone line is an example of open loop telemetry which uses a pair of wires only.
8. Attenuation and phase shift in receiver end is important due to ________________
a) Length of cable used
b) Impedance of cable
c) Mode of data transfer
d) All of the mentioned
View Answer
Explanation: Due to the impedance of transmission line, attenuation and phase shifting in receiver end are important.
9. Which of the following is favoured less?
a) Cable telemetry
b) Wireless telemetry
c) Both cable and wireless telemetry
d) None of the mentioned
View Answer
Explanation: Due to the problem created by the impedance of the cable and other parameters, cable telemetry is a less favoured one.
10. Low level signals can be transmitted using cables up to _________________
a) 500 m
b) 2 Km
c) 10 Km
d) 50 Km
View Answer
Explanation: Cable telemetry can be used for transferring low level signals(10 mV) over short range up to 2 Km.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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