Telemetry and Telecontrol Mid - I, September - 2014

1.______ Telemetry is used for telemetering upto 300 meters
  • Pneumatic
  • Hydraulic
  • Electrical
  • All of the above
Answer: C
2.In_____ system slide wire is replaced by a position detector like LVDT
  • Pneumatic telemetry
  • Voltage Telemetry
  • Current Telemetry
  • Motion Balance
Answer: D
3._____ is the most widely used but requires more spectrum space
  • TDM
  • FDM
  • Both A & B
  • None of the above
Answer: B
4.______ uses technique called spread spectrum to make multiplexing possible
  • TDM
  • FDM
  • TDMA
  • CDMA
Answer: D
5.VCO's are______ multivibrators whose frequency is controlled by the input from the signal conditioning circuits.
  • Astable
  • Monostable
  • Bistable
  • None of the above
Answer: A
6.____ code consists of dots & dashes
  • Morse
  • Baudot
  • ASCII
  • Binary
Answer: A
7.If C is channel capacity in bps, B is bandwidth in Hz & S/N is signal to noise ratio, shannon hartley theorem is
  • S/N=Blog2(1+c)
  • B=Clog2(1+S/N)
  • C=Blog2(1+S/N)
  • None of the above
Answer: C
8.In OSI model_______ layer defines the framing information for the block of data
  • Physical layer
  • Data Link Layer
  • Session Layer
  • Presentation Layer
Answer: B
9.In position telemetry synchro transmitter & receiver are used in
  • Motion balance mode
  • Torque transmission mode
  • Force transmission mode
  • None of the above
Answer: B
10.The telemetry standard of base band configuration developed by IRIG are
  • Proportional Bandwidth
  • Constant Bandwidth
  • Both A&B
  • None of the above
Answer: C
11.For transmitting data over 1km distance ____________________ telemetry can be used.
Answer: RF
12.The maximum power in A.M wave is when m=_____________
Answer: 1
13.A single cable or radio link can handle multiple signals simultaneously by using a technique known as _________________
Answer: Multiplexing
14.One complete revolution of the commutator switch in TDM is referred to as a _______________.
Answer: Frame
15.The sampling interval between each frame in a T-1 system is _______________
Answer: 125μsec
16._______________ is the product of baud rate & bit per symbol.
Answer: Bitrate
17.________________ is a device containing both modulator & demodulator.
Answer: Modem
18._________________ is also known as multicarrier modulation.
Answer: OFDM
19.The accuracy and speed with which information is sent & received over communication media is defined by ___________________.
Answer: Transmission efficiency
20.________________ uses two sine wave frequencies to represent binary 0 & 1.
Answer: FSK