Measurement Techniques Quiz

What is the uncertainty in the difference of diameters of two cylinders?

• ± 0.05 mm

• ± 0.02 mm

• ± 0.03 mm

• ± 0.01 mm

What could cause a random error in the driver’s measurement of the car’s speed using a speedometer?

• The speedometer does not read zero when the car is at rest.

• The driver’s eye is not always in the same position in relation to the pointer.

• The car’s speed is affected by the wind direction.

• The speedometer reads 10% higher than the car’s actual speed.

What are the amplitude and period of the wave shown on the cathode-ray oscilloscope?

• 12.0 V and 20 ms

• 1.5 V and 4 ms

• 5.0 V and 10 ms

• 6.0 V and 20 ms

What is the uncertainty in the difference of diameters of two cylinders?

• ± 0.01 mm

• ± 0.02 mm

• ± 0.03 mm

• ± 0.05 mm

What could cause a random error in the driver’s measurement of the car’s speed using a speedometer?

• The speedometer reads 10% higher than the car’s actual speed.

• The speedometer does not read zero when the car is at rest.

• The driver’s eye is not always in the same position in relation to the pointer.

• The car’s speed is affected by the wind direction.

What is the main characteristic of systematic errors in measurements?

• Vary in sign and magnitude

• Affects any measurement with limited precision

• Can be reduced by averaging

• Cannot be eliminated

Which of the following is an example of a random error?

• Human reaction time

• Incorrectly calibrated scale

• Faulty equipment

• Zero error in instrument

What is the formula to calculate the uncertainty in a derived quantity by simple addition of absolute, fractional, or percentage uncertainties?

• Multiplication and Division

• Addition and Subtraction

• When using Powers

• When using constants

What is the best estimate for the thickness of 20 sheets of paper?

• 1.91 mm

• 2.10 mm

• 1.96 mm

• 2.01 mm

Which of the following contributes most to the uncertainty in the calculated value of the Young modulus?

• Mass of load

• Length of wire

• Diameter of wire

• Acceleration of free fall