14.2.1 & 14.2.2 Quiz

What type of instrument is used to measure fuel level, temperature, and pressure?

• Frequency counter

• Oscilloscope

• Moving coil instrument

• Digital voltmeter

How does the output from a transducer in a moving coil instrument typically manifest?

• As a resistance

• As a frequency

• As a current

• As a voltage

What principle does a DC ratiometer operate on?

• Producing opposing torques

• Detecting temperature variations

• Measuring voltage differences

• Indicating frequency changes

In a moving coil instrument, what opposes the movement of the coil?

• The magnetic field

• The hairsprings

• The power supply

• The transducer

What happens to the pointer in a moving coil instrument when the deflecting force equals the controlling force?

• It remains steady

• It oscillates

• It reverses direction

• It moves to the maximum scale

What is the role of the variable resistor in a pressure indicator system?

• To adjust the current flow

• To measure temperature

• To provide a constant voltage

• To amplify the signal

How does the direction of current flow affect the magnetic field around a wire?

• It determines the field's direction

• It has no effect

• It increases the wire's temperature

• It changes the wire's resistance

What type of current does an AC ratiometer use?

• Alternating current

• High-frequency current

• Direct current

• Pulsating current

What is the effect of increasing current in a moving coil instrument?

• The instrument shuts down

• The hairsprings weaken

• The pointer moves further over the scale

• The pointer moves less

What is the purpose of the soft iron core in a moving coil instrument?

• To reduce weight

• To enhance the magnetic field

• To provide insulation

• To increase resistance