Giibilisco - Measuring Devices

18 Questions | By BATANGMAGALING | Last updated: Mar 22, 2022 | Total Attempts: 1183

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1.

The attraction or repulsion between two electrically charged objects is called
- A.
  
  Electromagnetic deflection.
- B.
  
  Electrostatic force.
- C.
  
  Magnetic force.
- D.
  
  Electroscopic force.
2.

The change in the direction of a compass needle, when a current-carrying wire is brought near, is called
- A.
  
  Electromagnetic deflection.
- B.
  
  Electrostatic force.
- C.
  
  Magnetic force.
- D.
  
  Electroscopic force.
3.

Suppose a certain current in a galvanometer causes the compass needle to deflect by 20 degrees, and then this current is doubled while the polarity stays the same. The angle of the needle deflection will
- A.
  
  Decrease.
- B.
  
  Stay the same.
- C.
  
  Increase.
- D.
  
  Reverse direction.
4.

One important advantage of an electrostatic meter is the fact that
- A.
  
  It measures very small currents.
- B.
  
  It can handle large currents.
- C.
  
  It can detect and indicate ac voltages as well as dc voltages.
- D.
  
  It draws a large current from a power supply.
5.

A thermocouple
- A.
  
  Gets warm when dc flows through it.
- B.
  
  Is a thin, straight, special wire.
- C.
  
  Generates dc when exposed to visible light.
- D.
  
  Generates ac when heated.
6.

An important advantage of an electromagnet-type meter over a permanent-magnet meter is the fact that
- A.
  
  The electromagnet meter costs much less.
- B.
  
  The electromagnet meter need not be aligned with the earth’s magnetic field.
- C.
  
  The permanent-magnet meter has a more sluggish coil.
- D.
  
  The electromagnet meter is more rugged.
7.

Ammeter shunts are useful because
- A.
  
  They increase meter sensitivity.
- B.
  
  They make a meter more physically rugged.
- C.
  
  They allow for measurement of large currents.
- D.
  
  They prevent overheating of the meter movement.
8.

Voltmeters should generally have
- A.
  
  High internal resistance.
- B.
  
  Low internal resistance.
- C.
  
  The greatest possible sensitivity.
- D.
  
  The ability to withstand large currents.
9.

In order to measure the power-supply voltage that is applied to an electrical circuit, a voltmeter should be placed
- A.
  
  In series with the circuit that works from the supply.
- B.
  
  Between the negative pole of the supply and the circuit working from the supply.
- C.
  
  Between the positive pole of the supply and the circuit working from the supply.
- D.
  
  In parallel with the circuit that works from the supply.
10.

Which of the following will not normally cause a large error in an ohmmeter reading?
- A.
  
  A small voltage between points under test
- B.
  
  A slight change in switchable internal resistance
- C.
  
  A small change in the resistance to be measured
- D.
  
  A slight error in the range switch position
11.

The main advantage of a FETVM over a conventional voltmeter is the fact that the FETVM
- A.
  
  Can measure lower voltages.
- B.
  
  Draws less current from the circuit under test.
- C.
  
  Can withstand higher voltages safely.
- D.
  
  Is sensitive to ac voltage as well as to dc voltage.
12.

Which of the following is not a function of a fuse?
- A.
  
  To ensure there is enough current available for an appliance to work right
- B.
  
  To make it impossible to use appliances that are too large for a given circuit
- C.
  
  To limit the amount of power that a device can draw from the electrical circuit
- D.
  
  To make sure the current drawn by an appliance cannot exceed a certain limit
13.

A utility meter’s motor speed depends directly on
- A.
  
  The number of ampere-hours being used at the time.
- B.
  
  The number of watt-hours being used at the time.
- C.
  
  The number of watts being used at the time.
- D.
  
  The number of kilowatt-hours being used at the time.
14.

A utility meter’s readout indicates
- A.
  
  Voltage.
- B.
  
  Power.
- C.
  
  Current.
- D.
  
  Energy.
15.

A typical frequency counter
- A.
  
  Has an analog readout.
- B.
  
  Is accurate to six digits or more.
- C.
  
  Works by indirectly measuring current.
- D.
  
  Works by indirectly measuring voltage.
16.

A VU meter is never used to get a general indication of
- A.
  
  Sound intensity.
- B.
  
  Decibels.
- C.
  
  Power in an audio amplifier.
- D.
  
  Visible light intensity.
17.

The meter movement in an illumination meter directly measures
- A.
  
  Current.
- B.
  
  Voltage.
- C.
  
  Power.
- D.
  
  Energy.
18.

An oscilloscope cannot be used to indicate
- A.
  
  Frequency.
- B.
  
  Wave shape.
- C.
  
  Energy.
- D.
  
  Peak signal voltage.