Signal Conditioning Circuits Mid - II, November - 2014

1.A voltage divider referenced to ground is created by connecting two electrical impedances in ….
  • Series
  • Parallel
  • Both series and Parallel
  • None
Answer: A
2.A …… amplifier is a conditioner for extremely narrowband ac signals from ac driven sensors
  • Charge
  • Noise in
  • Electrometer
  • Carrier
Answer: D
3.The ideal common-mode gain of an instrumentation amplifier is ……………….
  • Infinity
  • Unity
  • Zero
  • Low
Answer: C
4.A …………… oscillator is an oscillator whose frequency can be turned over some range
  • Variable resistance
  • Variable capacitance
  • Variable frequency
  • All
Answer: C
5.The … of a bridge is the ratio of the maximum expected change in the output voltage to the excitation voltage.
  • Resolution
  • Hysteresis
  • Drift
  • Sensitivity
Answer: D
6.The most common materials used for wire strain gauges are …………
  • Quartz
  • Rochelle salt
  • Constantan alloys
  • Aluminum
Answer: C
7.A ………………is a semiconductor device that converts light into current.
  • Pin diode
  • Photo diode
  • Photo transistor
  • MOSFET
Answer: B
8.The operation of a MOSFET can be separated into ………… different modes, depending on the voltages at the terminals.
  • One
  • Two
  • Three
  • Four
Answer: C
9.LVDT is an ………… transducer
  • Resistive
  • Capacitive
  • Inductive
  • Piezo-electric
Answer: C
10.………… are used to measure the impedances consisting capacitances and inductances
  • AC Bridges
  • DC bridges
  • LVDT
  • Strain gauges
Answer: A
11.A ________________ provides an output voltage which varies proportionally to any changes of charge stored on a device connected to its input terminals.
Answer: Charge amplifier
12.The ______________ is a passive resistive transducer which is based on the principle of conversion of mechanical displacement in to the resistance change.
Answer: Strain gauge
13._________________ is a passive linear circuit that produces an output voltage (Vout) that is a fraction of its input voltage (Vin).
Answer: Voltage divider
14._________________ is a comparison between measurements or correctness made or set with one device and another measurement made in as similar a way as possible with a second device.
Answer: Calibration
15.An ___________ is an electrical instrument for measuring electric charge or electrical potential difference.
Answer: Electrometer
16.An ______________ is an electromechanical device that can measure motion or position.
Answer: Encoder
17.A __________________ is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated.
Answer: Charge-coupled device (CCD)
18.____________________ are used to detect movement of targets and to measure the distance to targets in many automated factories and process plants.
Answer: Ultrasonic sensors
19.A ___________________ is a sensor that uses optical fiber either as the sensing element or as a means of relaying signals from a remote sensor to the electronics that process the signals.
Answer: Fiber optic sensor
20.The ___________________ is a type of transistor used for amplifying or switching electronic signals.
Answer: Metal–oxide–semiconductor field-effect transistor