Delmar assignment # 5-units 15-16
In a right triangle, the longest side, which is always opposite the right angle, it's call the? A. Opposite side B. Right side C. Adjacent side D. Hypotenuse
Hypotenuse
A right triangle has one side of 5 and another side of 4 ( neither side is the hypotenuse). What is angle adjacent to the side that is 5? A. 38.66° B. 36.87° C. 53.13° D. 51.34°
38.66°
What is the peak voltage of a 277 V RMS AC voltage? A. 434.85 V B. 176.45 V C. 195.90 V D. 391.68 V
391.68 V
A right triangle has a hypotenuse of 10 feet. And one angle of 30°. How long is the side opposite the angle? A. 8.67 feet B. 5 feet C. 20 feet D. 11.55 feet
5 feet
A right triangle has a hypotenuse of 87 and one side that is 44. How long is the other side? A. 131 B. 97.49 C. 43 D. 75.05
75.05
In a triangle, the right angle is an angle of? A. Less than 45° B. Greater than 90° C. 45° D. 90°
90°
In an AC sine wave, the peak positive voltage is reached at _____ in the cycle. A. 180° B. 90° C. 360° D. 270°
90°
Vectors must be added using_____ addition. A. Rectangula B. Exponential C. Simple D. A combination of geometric and algebraic
A combination of Geo metric and algebraic
What type of wave form zigzags up and down in straight lines? A. A cosine wave B. A pulsating wave C. A triangle wave D. A sine wave
A triangle wave
What is a triangle that contains one 90° angle called? A. Right B. Hypotenuse C. Opposite D. Adjacent
Right
When AC voltage is rectified and converted into DC, the resulting waveform is pulsating DC. The resulting pulses are called? A. Peaks B. Cosines C. Ripple D. Harmonics
Ripple
RMS stands for ______-______-______
Root mean square
The function that is equal to the opposite side divided by the hypotenuse is the? A. Cotangent B. Tangent C. Sine D. Cosine
Sine
Rotating machines (alternators) normally produce a wave shape called a? A. Linear wave B. Sine wave C. Pulsating wave D. Cosine wave
Sine wave
The most common of all AC waveforms is the ____-_______
Sine wave
In high frequency AC circuits, electrons tend to flow toward the outer surface of a conductor. Which causes the resistance of the conductors to be higher than in low-frequency AC circuits or DC circuits. This is known as? A. Insulation affect B. Skin effect C. Phasing D. Resistance
Skin effect
A triangle wave is a wave form which zigzags up-and-down in a linear wave.
True
In a DC circuit, the amount of watts used by the load is the product of the voltage and current. Ignoring any resistance in the circuit wiring, the amount of power used by the load is called_______power. A. Inductive B. Apparent C. Reactive D. True
True
A line that indicates both magnitude and direction is a? A. Linear B. Scalar C. Vector D. Exponential
Vector
In a DC circuit, power is measured in? A. Volt-amperes B. Hertz C Vars D. Watts
Watts
The amplitude or peak value of a waveform is measured from? A. Zero to the average level B. Peak to peak C. Zero to either peak D. Zero to the RMS level
Zero to either peak
Another term equivalent to the RMS value is the ____________ value A. Average B. Peak C. Effective D. Peak to peak
effective
Frequency is measured in ___________
Hertz
The number of AC cycles completed in one second iS called the? A. Cycle B. Rotation C. Frequency D. Hertz
Frequency
AC frequency is measured in? A. Rotations B. Cycles C. Hertz D. Frequency
Hertz
A right triangle has one angle that is 60°. The site adjacent to the 60° angle has a length of 7 inches. How long is the opposite side? A. 12. 12 inches B. 4.04 inches C. 6.06 inches D. 3.5 inches
12. 12 inches
A right triangle has two sides that are 9 inches and 12 inches. How long is a hypotenuse? A. 15 inches B. 3 inches C. 21 inches D. 7.94 inches
15 inches
What is the average voltage of a full wave rectified 240 V RMS AC voltage? A. 532.75 V B. 152.88 V C. 216.23 V D. 76.32 V
216.23 V
What is the RMS value of an AC voltage that has a 480 V peak? A. 678.72 V B. 753.53 V C. 305.76 V D. 339.46 V
339.46 V
In a right triangle, the two non-right angles are each formed by the hypotenuse and one of the other sides. From the perspective of the angle, the side that is not the hypotenuse is called the? A. Adjacent side B. Opposite side C. Right side D. Nearest side
Adjacent side
If an AC sine wave is changed into DC with a rectifier, the resulting voltage value will be the _______ value of the AC waveform . A. Peak to peak B. Average C. Peak D. Effective
Average
In an AC circuit, multiplying the peak voltage by 0.637 results in the __________value.
Average
The Pythagorean theorem is?
C2= a2 + b2
The function that is equal to the adjacent side divided by the hypotenuse is the? A. Tangent B. Cotangent C. Cosine D. Sine
Cosine
AC waveforms repeat the same shape over and over. From the beginning of one shape to the end of that shape it's called one? A. Frequency B. Cycle C. Rotation D. Hertz
Cycle
The most common of all AC waveforms is based on the cosine wave.
False
In an AC circuit with only resistance, the voltage and current sine waves both pass through zero heading in the same direction at the same time. They are said to be? A. In lagging phase B. Out of phase C. In phase D. In leading phase
In phase
An AC waveform in which the voltage rises at a constant rate with respect to time is called a? A. Cosine wave B. Sine wave C pulsating wave D. Linear wave
Linear wave
What is the approximate sum of the following two vectors? Magnitude 10 at 120 degrees and magnitude 15 at 90° A. Magnitude 5 at 30° B. Magnitude 5 at 210° C. Magnitude 25 at 210° D. Magnitude 24 at 102°
Magnitude 24 at 102°
What is the approximate sum of the following two vectors? Magnitud 23 at 62° and magnitude 17 at 10°. A. Magnitude 5 at 52° B. Magnitude 40 at 72° C. Magnitude 40 at 52° D. Magnitude 36 at 40°
Magnitude 36 at 40°
What is the approximate sum of the following two vectors? Magnitude 5 at 0° and magnitude 10 at 180° A. Magnitude 5 at 90° B. Magnitude 5 at 180° C. Magnitude 15 at 90° D. Magnitude 15 at 180°
Magnitude 5 at 180°
In a right triangle, the side across from an angle (the side not one of the two making up the angle) is called thae? A. Right side B. Opposite side C. Adjacent side D. Hypotenuse
Opposite side
The memory aid to help you remember the trigonometry function relationship is A. Oscar had a pile of oranges B. Oscar had a pile of apples C. Oscar had a heap of apples D. Oscar had a heap of oranges
Oscar had a heap of apples
Which is one method of adding two vectors that originate at the same point? A. Trapezoid B. Parallelogram C. Square D. Rectangle
Parallelogram
The height of a waveform from zero to a maximum positive or a maximum negative is called the? A. RMS B. Peak C. Effective D. Peak to peak
Peak
In a right triangle, the SUM of the squares of the two sides is equal to the square of the hypotenuse. This was discovered by a Greek named? A. Hypotenuse B. Aristotle C. Lenz D. Pythagoras
Pythagoras
In an AC circuit multiplying the peak voltage by 0.707 results in the _______value.
RMS
The value of AC voltage which produces the same amount of heat in a load as DC voltage is Called the _____value.
RMS
What is the approximate sum of the following two vectors? Magnitude 20 at 30° and magnitude 10 at 60° A. Magnitude 30 at 90° B. Magnitude 10 at 90° C. Magnitude 30 at 30° D. Magnitude 29 at 40°
magnitude 29 at 40°
A device used to create a square AC wave, or to change DC into AC is called a? A. Rectifier B. Alternator C. Oscillator D. Converter
oscillator