If a typical neuron can be represented by a cylinder 20 μ m in diameter and 80 μ m long, then how many might fit into a human brain?

	a. 1 Megacells
	b. 1 Kilocells
	c. 100 Teracells
	d. 100 Gigacells
	e. 1000 Teracells

.

The legs of a right triangle are measured to be 12.2 +/- 0.1 and 2.8 +/- 0.1 mm. What is the area of the triangle?

	a. 17.1 +/- 0.82 mm 2
	b. 17.1 +/- 0.25 mm 2
	c. 17 +/- 0.5 mm 2
	d. 17.1 +/- 0.06 mm 2
	e. 17.1 +/- 0.63 mm 2

.

Two gauge pressures P₁ and P₂ are measured in order to determine the difference pressure across an orifice, P_d. Several measurements are made of each and it is found that P₁ = 25 +/- 1.8 mm Hg and P2 = 12 +/- 0.6 mm Hg. What is the estimate of the difference pressure P_d (mm Hg) and its standard deviation?

	a. 13, 1.9
	b. 13, 1.4
	c. 12, 1.4
	d. 12, 1
	e. 1, 12

.

The length of a pipe is measured with a meter stick. This measurement requires three uses since the pipe is more than 2 meters long. The first measurement is 1 m. The second measurement is 1m. The third measurement is 0.76m. The total length of the meter stick in the sum of the three measures. Each measurement can be made to +/- 0.15 cm. What is the total length and estimated error in m?

	a. 2.76 +/ 0.0026 m
	b. 2.75 +/- 0.026 m
	c. 2.76 +/- 0.0015 m
	d. 2.76 +/- 0.029 m
	e. 2.76 +/- 0.0045 m

.

Calculate the approximate number of grains of sand in a layer 10 m deep covering the entire surface of the planet earth.

	a. 1010
	b. 1012
	c. 1025
	d. 1031
	e. 10− 3

.

The masses of 8 nominally identical items were determined to be 4.23 g, 4.37 g, 3.98 g, 4.75 g, 4.12 g, 4.45 g, 4.71 g, and 3.35 g. What are the mean and standard deviation of the masses?

	a. 4.24, 0.45
	b. 4.2, 0.5
	c. 4.2, 0.4
	d. 0.4, 4.2
	e. 4.24, 0.43

.

The volume of gasoline dispensed at a commercial gas station for a nominal 10 L volume was measured on five separate trials to be 9.89 L, 10.02 L, 10.3 L, 9.48 L, and 9.91 L. What are the mean and standard deviations of the volume dispensed for the five trials?

	a. 9.97, 0.11
	b. 9.92, 0.3
	c. 9.0, 0.2
	d. 1.00, 0.1
	e. 1.00, 0.15

.

Compute the standard deviation of the following measures of bearing diameter: 5.80 mm, 5.83 mm, 5.82 mm, 6.11 mm, 5.80 mm.

	a. 0.13 mm
	b. 0.1 mm
	c. 0.15 mm
	d. 0.2 mm
	e. 0.03 mm

.

A box measures 400 μm by 300 μm by 200 μm . How many such boxes of water would it take to fill a liter?

	a. 4.2x 104
	b. 4.2x 107
	c. 4.2x 105
	d. 2.4x 106
	e. 2.4x 104

.

A radio station broadcasts at 89.2 MHz. What is the duration of one cycle of the primary oscillation?

	a. 11.2 ns
	b. 112 ns
	c. 89.2 ps
	d. 89.2 ns
	e. 11.2 fs

.

A typical incandescent light bulb consumes 0.1kW. How many such bulbs can a 400 MW source power?

	a. 4x106
	b. 4x103
	c. 400x106
	d. 4x104
	e. 4x107

.

A ping pong ball is 40 mm in diameter. Calculate the approximate number required to fill an empty swimming pool 60 yards x 30 yards x 6 feet deep.

	a. 1x10 8
	b. 5x1010
	c. 5x10 5
	d. 5x1011
	e. 5000

.

A set of new car tires has a tread depth of 10/32 ". The tires are declared unsafe by the owner at a tread depth of 2/32 ". The tires are expected to last 100,000 km. How many miles per 1/32 " of tread might the owner expect to use the tires?

	a. 7800
	b. 14000
	c. 3600
	d. 1200
	e. 5200

.

The following data were recorded for the length of an elastic string (m) as a function of load (N): (0.51, 0.1), (0.52, 0.2), (0.6, 0.3), (0.8, 0.5), (0.9,0.6), (0.95, 0.7), (0.98, 0.8). Plot the length of the string versus load. Estimate the length of the string without a load.

	a. 0.5 m
	b. 0.6 m
	c. 1.0 m
	d. 0.75 m

.

The following data were recorded for the length of an elastic string (m) as a function of load (N): (0.51, 0.1), (0.52, 0.2), (0.6, 0.3), (0.8, 0.5), (0.9,0.6), (0.95, 0.7), (0.98, 0.8). Plot length as a function of load. Estimate the length of the string at full extension.

	a. 1 m
	b. 0.75 m
	c. 0.5 m
	d. 0.8 m
	e. 0.95 m

.

The following data were recorded for the length of an elastic string (m) as a function of load (N): (0.51, 0.1), (0.52, 0.2), (0.6, 0.3), (0.8, 0.5), (0.9,0.6), (0.95, 0.7), (0.98, 0.8). Plot the length of the string versus load. Interpolate to estimate the length for an applied load of 0.45 N.

	a. 0.7 m
	b. 0.8 m
	c. 0.6 m
	d. 0.55 m
	e. 0.9 m

.

The temperature of a sensor reads temperature (C) as a function of time (s) as (25,10), (60,30), (80,45), (92,55), (98,60), (102,90).
Plot ln ((T − 103)/(20 − 103)) versus t. What is the slope in s^-1?

	a. -0.057
	b. -0.57
	c. 0.57
	d. 5.7
	e. -0.0057

.

The temperature of a sensor reads temperature (C) as a function of time (s) as (45,2), (60,5), (80,10), (92,25), (98,50), (102,100).
Plot ln ((T − 103)/(20 − 103)) versus t. What is the slope in s^{− 1} ?

	a. -0.039
	b. -0.39
	c. -.93
	d. 3.9
	e. -0.0039

.

The depth of liquid in a container increases approximately linearly with time. The following measurements were taken for (t(s), d(depth cm)): (0,0), (10, 1), (30, 5), (60, 12), (120, 30), (200, 50). Find the average rate of increase in cm/s from the slope of a least-squares fit line.

	a. 0.26
	b. 0.29
	c. 0.23
	d. 0.30
	e. 4.0

.

The depth of liquid in a container increases approximately linearly with time. The following measurements were taken for (t(s), d(depth cm)): (0,0), (10, 1), (30, 5), (60, 12), (120, 30), (200, 50). Estimate the height of the liquid in cm at 150s from a least-squares fit line.

	a. 37
	b. 35
	c. 39
	d. 33
	e. 40

.

A temperature probe provides the following data as a function of time (T(C), t(s)): (99, 2.0), (95, 11.0), (91,13.5), (85,17.0), (78,41), (69, 45), (46, 68), (49,112). Plot the data. You may use a spreadsheet or other data analysis system. Extrapolate using a least-squares line to find the temperature at t=0s.

	a. 105 C
	b. 96 C
	c. 90 C
	d. 125 C
	e. 85 C

.

A temperature probe provides the following data as a function of time (T(C), t(s)): (99, 2.0), (95, 11.0), (91,13.5), (85,17.0), (78,41), (69, 45), (46, 68), (49,112). Plot the data. You may use a spreadsheet or other data analysis system. Interpolate to find the temperature at 60s.

	a. 90 C
	b. 65 C
	c. 22 C
	d. 45 C
	e. 40 C

.

A temperature probe provides the following data as a function of time (T(C), t(s)): (99, 2.0), (95, 11.0), (91,13.5), (85,17.0), (78,41), (69, 45), (46, 68), (49,112). Plot the data. You may use a spreadsheet or other data analysis system. Which data pair deviates most from the least-squares line?

	a. 99, 2
	b. 95, 11
	c. 85, 17
	d. 46, 68
	e. 69, 45

.

A temperature probe provides the following data as a function of time (T(C), t(s)): (99, 2.0), (95, 11.0), (91,13.5), (85,17.0), (78,41), (69, 45), (46, 68), (49,112). Plot the data. You may use a spreadsheet or other data analysis system. What is the least-squares slope of the data?

	a. 0.51 degrees C/s
	b. -0.51 degrees C/s
	c. 96 degrees C/s
	d. 1.7 degrees C/s
	e. -1.7 degrees C/s

.

A sensor displays the following data as a function of time (s) (reading, time): (15, 2), (18,5), (32,10), (41,15), (53,25), (65,38). Plot the data.
Extrapolate to estimate the reading at t=0.

	a. 15
	b. 5
	c. 0
	d. 3
	e. 20

.

A sensor displays the following data as a function of time (s) (reading, time): (15, 2), (18,5), (32,10), (41,15), (53,25), (65,38). Plot the data.
Interpolate to estimate the reading at t=20 s.

	a. 43
	b. 39
	c. 51
	d. 12
	e. 53

.

A sensor displays the following data as a function of time (s) (reading, time): (15, 2), (18,5), (32,10), (41,15), (53,25), (65,38). Estimate the slope in s^-1 from a least-squares fit line.

	a. 1.4
	b. 1.8
	c. 1.2
	d. 1.0
	e. 2.0

.

A sensor displays the following data as a function of time (s) (reading, time): (15, 2), (18,5), (32,10), (41,15), (53,25), (65,38). Plot the data.
Interpolate with a linear least-squares fit of all the data to estimate the reading at t=33s.

	a. 62
	b. 68
	c. 54
	d. 72
	e. 45

.

A 12 bit ADC may have _____ unique output conditions.

	a. 211
	b. 210
	c. 122
	d. 1210
	e. 212

.

Each bit can be in one of two states. 2x2....x2 = 2¹².

A 16 bit ADC may have ____ unique output conditions.

	a. 216
	b. 1610
	c. 1216
	d. 1016
	e. 1024

.

Each bit may have one of two states. 2x2x2....x2x2=2¹⁶

A 24 bit ADC may have _____ unique output conditions.

	a. 224
	b. 210
	c. 242
	d. 1224
	e. 2424

.

A 3dB attenuator and a 6dB attenuator in series provide a total attenuation of:

	a. 9dB
	b. 27dB
	c. 18dB
	d. 12dB
	e. None of the above

.

A 6dB attenuator and a 50dB attenuator in series provide a total attenuation of:

	a. 300dB
	b. 56dB
	c. 5.4dB
	d. 50dB
	e. None of the above

.

A bridge circuit __________________________.

	a. Is useful for comparing resistances.
	b. Permits current passage through a barrier.
	c. Measures the current bypassing a “bridge.”
	d. Gates current flow periodically.
	e. None of the above.

.

A current source __________________.

	a. Can supply an infinite current upon demand
	b. Supplies a constant current regardless of voltage within practical limits
	c. Is the source in use at the present
	d. Can supply AC or DC upon demand
	e. Supplies current varying linearly with the output voltage

.

A digital signal __________________.

	a. Is represented by numbers ranging from 1 to 10
	b. Corresponds to the output of the digital-to-analog converter
	c. Is represented by 10 bits of data
	d. Takes on discrete values over a range
	e. None of the above

.

A filter is an AC circuit that separates signals based upon ___________.

	a. Amplitude
	b. Voltage
	c. Frequency
	d. Time
	e. Duration

.

A low-pass filter permits the passage of _________.

	a. Low frequency signals
	b. Small voltages
	c. Small currents
	d. DC signals
	e. All of the above

.

A power gain of 3 dB corresponds to a factor of ___.

	a. 2
	b. 4
	c. 3
	d. 6
	e. 1000

.

A power gain of 30 dB corresponds to a factor of ____.

	a. 10
	b. 30
	c. 100
	d. 1000
	e. 3000

.

A rectifier is used to limit ____________.

	a. Current amplitude
	b. Current frequency
	c. Voltage amplitude
	d. Voltage noise
	e. Current direction

.

A signal (in the context of this course) is ___________________.

	a. An indication to start or stop an activity
	b. An unexpected event
	c. An electrical current
	d. A detectable quantity used to communicate information
	e. None of the above

.

A signal with a "live zero" is useful for detecting __________.

	a. Equipment malfunction
	b. A fluctuating digital readout
	c. A non-zero rest state for an analog signal
	d. A faulty digital readout
	e. None of the above

.

A simple way to filter out high frequencies is to place _____________.

	a. An inductor in parallel with the load
	b. A capacitor in parallel with the load
	c. A capacitor in series with the load
	d. A rapid switch in series with the load
	e. None of the above

.

A simple way to filter out high frequencies is to place _________________.

	a. An inductor in parallel with the load
	b. An inductor in series with the load
	c. A capacitor in series with the load
	d. A rapid switch in series with the load
	e. None of the above

.

A simple way to filter out low frequencies is to place ______________.

	a. An inductor in series with the load
	b. A capacitor in parallel with the load
	c. A capacitor in series with the load
	d. A rapid switch in series with the load
	e. None of the above

.

A simple way to filter out low frequencies is to place _________________.

	a. An inductor in series with the load
	b. A capacitor in parallel with the load
	c. An inductor in parallel with the load
	d. A rapid switch in series with the load
	e. None of the above

.

A transformer permits the conversion of __________.

	a. AC current to DC current
	b. DC current to AC current
	c. Change of frequency
	d. Change of power consumed
	e. Voltage of AC current

.

AC amplitude may be measured by ________________.

	a. Frequency
	b. Period
	c. Frequency and period
	d. Duration
	e. Peak-to-peak, RMS, or average amplitude

.

Aliasing in signal digitization occurs when _____________.

	a. A signal is digitized too rapidly
	b. A signal is not digitized rapidly enough
	c. A signal is not digitized with enough amplitude resolution
	d. A connection is mislabeled
	e. All of the above

.

Aliasing can be avoided by ____________.

	a. Rapid or over-sampling
	b. Using a band-pass filter before digitization
	c. Adjusting the amplifier gain appropriately
	d. Rapid over-sampling and/or using a band-pass filter before digitization
	e. Labeling all inputs correctly

.

Alternating Current _________________.

	a. Oscillates at 60 Hz
	b. Changes amplitudeand/or direction with time
	c. Is always positive
	d. Decays with time
	e. None of the above

.

 An analog signal _______________.

	a. Is continuously variable over a range
	b. Takes on a finite number of discrete values
	c. Is measured in units of electrical current or flow rate
	d. Is measured by voltage
	e. Is determined continuously in time

.

Frequency (f) is related to period (T) by __________.

	a. A reciprocal relationship f = 1/T
	b. A product relationship f = kT
	c. Counting the number of periods in a fixed time
	d. f = sin(T)
	e. None of the above

.

An important disadvantage of voltage signals is:

	a. Voltage drop along the conductors
	b. Stray signals from lightning
	c. Difficulty measuring voltage accurately
	d. Radio-frequency interference
	e. None of the above

.

Period( T) is related to frequency (f) by __________.

	a. A reciprocal relationship T = k/f
	b. A product relationship f = kT
	c. Counting the number of periods in a fixed time
	d. f = sin(T)
	e. None of the above

.

The nomenclature “live zero” indicates ________.

	a. A drifting baseline
	b. A fluctuating digital readout
	c. A non-zero rest state for an analog signal
	d. A faulty digital readout
	e. None of the above

.

The voltage across a 10 Ohm resistor is measured to be 4 Volts.
What is the power dissipated in that resistor?

	a. 1.6 Watts
	b. 0.16 Watts
	c. 4 Watts
	d. 0.4 Watts
	e. 400 Watts

.

Three resistors (R₁, R₂, R₃) connected in parallel present a total resistance of:

	a. R1+R2 + R3
	b. 1/R1 + 1/R2+1/R3
	c. R1xR2xR3/(R1+R2+R3)
	d. R1/R2 + R2/R3 + R3/R1
	e. R1xR2xR3/(R2xR3 + R1xR3+R1xR2)

.

Three resistors (R₁, R₂, R₃) in series present a total resistance of:

	a. R1 + R2 + R3
	b. 1/R1 + 1/R2+1/R3
	c. R1xR2xR3/(R1+R2+R3)
	d. R1/R2 + R2/R3 + R3/R1
	e. None of the above

.

100 Angstroms is equivalent to:

	a. 10 nm
	b. 100 nm
	c. 1 μ m
	d. 0.1 μ m
	e. 100 nm

.

Calipers enable measurements of lengths finer than ____.

	a. μ m
	b. mm
	c. nm
	d. cm
	e. fm

.

Equipment may be machined to tolerances approaching ____.

	a. μ m
	b. mm
	c. nm
	d. cm
	e. pm

.

Equipment may be machined to tolerances approaching ____.

	a. 10− 6 m
	b. 10− 1 m
	c. 10− 2 m
	d. 10− 3 m
	e. 10 6 m

.

Molecular dimensions are on the order of ____.

	a. nm
	b. mm
	c. cm
	d. pm
	e. fm

.

Molecular dimensions are on the order of ____.

	a. 10−9 m
	b. 10−3 m
	c. 10−2 m
	d. 10−12 m
	e. 10−15 m

.

A Vernier scale is useful for ____________.

	a. Reading subdivisions of gradations
	b. Using a magnifier
	c. Reading tenths of mm
	d. Reading tenths of cm
	e. Reading fractions of the entire scale

.

Visible light microscopy can view features as small as a few ____.

	a. mm
	b. pm
	c. nm
	d. μ m
	e. fm

.

A clock accurate to within one second per year has a possible drift of approximately on part in:

	a. 107
	b. 108
	c. 106
	d. 109
	e. 1010

.

A human-operated stop watch may be expected to be precise to within _____.

	a. 10 ms
	b. 50 ms
	c. 300 ms
	d. 1 s
	e. 5 s

.

A typical human reaction time is on the order of ______.

	a. 200 ms
	b. 500 ms
	c. 10 ms
	d. 50 ms
	e. 1 s

.

The current standard for time measurement is accurate to one part in ___.

	a. 10 5
	b. 1010
	c. 1015
	d. 1050
	e. 1025

.

The fastest chemical reactions can take place on time scales of ___.

	a. ps
	b. ns
	c. ms
	d. μ s
	e. fs

.

The time required for light or other electromagnetic signals to travel 1 m is approximately ________.

	a. 1 ms
	b. 1 x 10-9 s
	c. 1 x 10-23 s
	d. 1 x 10-5 s
	e. 1 x 10-60 s

.

The time required for light or other electromagnetic radiation to travel a nm is approximately ______.

	a. 3 x 10−18 s
	b. 3 x 10−16 s
	c. 3 x 10−20 s
	d. 3 x 10−10 s
	e. 3 fs

.

A column of mercury 1 m high exerts a pressure equivalent to:

	a. 33 ft water
	b. 9.8 ft water
	c. 45 ft water
	d. 12 ft water
	e. 760 psi

.

A column of vegetable oil 33 ft high exerts a pressure of:

	a. 0.9 atm
	b. 33 atm
	c. 1 psi
	d. 1.1 atm
	e. 1000 torr

.

A column of water 33 ft high exerts a pressure of:

	a. 1 atm
	b. 33 atm
	c. 1 psi
	d. 13 psi
	e. 1000 torr

.

A force of 1 Newton is approximately equal to:

	a. 9.8 lbf
	b. 32.2 lbf
	c. 0.225 lbf
	d. 4.448 lbf
	e. 0.138 lbf

.

A force of 5 N is applied at the end of a 20 cm wrench. The applied torque is ____.

	a. 0.10 Nm
	b. 244 Nm
	c. 1 Nm
	d. 2440 Nm
	e. 1220 Nm

.

A mass of 60 lb_m at the end of a yard-long pipe accelerated by earth's gravity orthogonal to the pipe pivot exerts a torque of _____ at the pivot at the other end of the pipe.

	a. 122 Nm
	b. 244 Nm
	c. 980 Nm
	d. 2440 Nm
	e. 1220 Nm

.

A pressure gauge reads 112 torr gauge at sea level. The total pressure is approximately ______.

	a. 872 torr
	b. 41 psi
	c. 1470 torr
	d. 1.12 atm
	e. 760 mm Hg

.

A pressure gauge reads 24.3 psi gauge at sea level. The total pressure is approximately _______.

	a. 2.65 atm
	b. 45 psi
	c. 1470 torr
	d. 3.65 atm
	e. 760 mm Hg

.

A strain gauge increases resistance by 0.08 Ohm/mm of extension at 20 degrees C. An increase of 0.023 Ohms in resistance indicates a strain of ____.

	a. 0.124 mm
	b. 0.288 mm
	c. 0.300 mm
	d. 0.385 mm
	e. 0.060 mm

.

A strain gauge increases resistance by 0.043 Ohm/cm of strain. An increase in resistance of 0.019 Ohms corresponds to a strain of ____.

	a. 4.4 mm
	b. 4.4 cm
	c. 0.44 mm
	d. 0.44 m
	e. 0.44 μ m

.

A strain gauge increases resistance by 0.093 Ohm/cm of strain. An increase in resistance of 0.012 Ohms corresponds to a strain of _____.

	a. 1.3 mm
	b. 1.3 cm
	c. 0.44 mm
	d. 0.44 m
	e. 0.44 μ m

.

A torque of 25 lb-ft is equivalent to:

	a. 34 Nm
	b. 30 Nm
	c. 32 Nm
	d. 9.8 Nm
	e. 160 Nm

.

A vendor reports that a vacuum pump can provide 25 psi of vacuum. What is wrong with this claim?

	a. The vendor does not specify gauge or absolute pressure.
	b. The vendor does not specify static of dynamic pressure.
	c. The vendor does not use SI units.
	d. The vendor claims a non-sensible specification.
	e. All of the above.

.

Mattias’s mass is 185 lb_m. His mass in kg is approximately ____.

	a. 85 kg
	b. 93 kg
	c. 95 kg
	d. 100 kg
	e. 185 kg

.

Mattias’s mass is 85.2 kg. His mass in lb_m is approximately ___.

	a. 188 lbm
	b. 37.9 lbm
	c. 32.2 lbm
	d. 225 lbm
	e. 204.5 lbm

.

A measurement of 212 degrees Rankine corresponds to ___________.

	a. 118 degrees Kelvin
	b. The boiling point of water
	c. − 12 degrees Fahrenheit
	d. 0 degrees Centigrade
	e. A physical impossibility

.

A newscast reports that the temperature at the surface of a newly discovered planet orbiting a distant star is -502 degrees Fahrenheit. What is wrong with this claim?

	a. One cannot measure temperatures from a distance.
	b. There is no temperature measure in a vacuum.
	c. The reported temperature is below absolute zero.
	d. The temperature should be reported in degrees Kelvin.
	e. None of the above

.

A temperature of 32 degrees Fahrenheit corresponds to ______.

	a. 273.15 degrees Kelvin
	b. 0 degrees Kelvin
	c. 212 degrees Centigrade
	d. 32 degerees Centigrade
	e. The boiling point of water

.

A thermistor differs from a thermocouple in that:

	a. A thermistor requires a current souce whereas a thermocouple does not
	b. A thermocouple requires a current source whereas a thermistor does not
	c. A thermistor is smaller
	d. A thermocouple requires requires precise voltage measurements
	e. A thermocpule consists of two thermistors

.

A thermistor has a ____________.

	a. Temperature-dependent resistance
	b. Temperature-dependent thermal conductivity
	c. Temperature-dependent voltage
	d. Temperature-dependent density
	e. Temperature-dependent resistance to heat transfer

.

A thermocouple produces a _________________.

	a. Temperature-dependent voltage
	b. Temperature-dependent resistance
	c. Temperature-dependent mass
	d. Temperature-dependent capacitance
	e. None of the above

.

An alcohol-in-glass thermometer typically relies upon _____ to reflect the temperature.

	a. Thermal expansion of the liquid
	b. Transfer of heat from the alcohol to the glass
	c. The amount of alcohol in the bulb
	d. The color of the dye used
	e. Evaporation of the alcohol

.

Bimetallic thermometers typically work because of _____________.

	a. Differences in the thermal expansion of two different metals
	b. Fusion of two metals at a certain temperature
	c. Capacitance at the junction of two metals
	d. Electrtical resistance at the junction of two metals
	e. Inductance of a bimetal coil

.

If we wish to have a very fast temperature sensor, we should be concerned with:

	a. The specific heat capacity of the materials used in constructing the sensor
	b. The rate at which the sensor output is sampled
	c. The mass of the sensor
	d. The thermal conductivity of the sensor
	e. All of the above

.

The temperature of the healthy human body in degrees C is ____.

	a. 98.6
	b. 32
	c. 40
	d. 100
	e. 37

.