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