August 24

EASY ROUND

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An experiment in which a single action, such as flipping a coin, is repeated identically over and over. The possible results of the action are classified as “success” or “failure".

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An iterative process using derivatives that can often be used to find the zeros of a differentiable function.

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It is the partial pressure of water vapor at the existing temperature divided by the equilibrium vapor pressure of water at the existing temperature.

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What is the other name for “The Law of definite proportion”?

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The ability of a power-supply voltage regulator to maintain its output voltage despite variations in its input voltage.

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Often refers to using the output of a step-up converter to drive the main power FET switch, providing more gate drive than the input can supply alone. Also refers to using a switched capacitor to boost the voltage of a node.

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It is the ratio of the largest possible magnitude to the smallest possible magnitude that can be decoded by the digital-to-analog converter in the receiver.

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What results when the analog waveform rises or drops too quickly and the codec may not be able to keep up with the change?

MODERATE ROUND

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It is a perpendicular drawn to a side of a triangle from the midpoint of the opposite side.

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A construction crane lifts a 100 lb bucket containing 155 lb of sand at a constant rate. The sand leaks out a constant rate so that there is only 77.5 lb of sand left when the crane reaches a height of 60 feet. How much work is done by the crane?

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It refers to an electron ejected at high speeds from the nuclei of certain radioactive isotopes.

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On a space station, a 10.0-L steel drum of oxygen gas at 25 degC and 101.3 kPa pressure springs a leak and 8.00 g of gas escapes before the leak is plugged. What is the final pressure of the oxygen in the drum at 25 degC?

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What is the bandgap energy for diamonds?

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A 240V, 50 Hz supply feeds a highly inductive load of 50 ohms resistance through a half controlled thyristor bridge. When the firing angle is 45 degrees, determine the rms current at the load.

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Refers to the unused TV channels between the active ones in the VHF and UHF spectrum.

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For a given length of RG 8A/U coaxial cable with a distributed capacitance C = 96.6 pF/m, a distributed inductance L = 241.56 nH/m. Determine the velocity of propagation.

DIFFICULT ROUND

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What do you call the diagonal slash “/” used as the bar between numerator and denominator of an in-line fraction, also called a diagonal.

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A wooden cube has edges 3 meters in length. Square holes with sides one meter in length and centered in each face are cut through to the oposite face with the edges of the holes parallel to the edges of the cube. What is the entire surface area, including the inside?

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This is also known as the Philippine Public Telecommunications Policy Act.

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A lead bullet travelling at 120 m/s strikes a wooden block with a mass of 50 g and remains in the block. If the bullet is 3 g heavy, what is the rise of temperature of the bullet if the block is fixed?

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How many flip-flops are required to make a MOD-32 binary counter?

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A belt-driven 150 kW shunt wound DC generator is running at 450 rpm and is supplying full load to a bus bar at 240 V. At what speed will it run if the belt breaks and the machine continues to run taking 8.5 kW from the bus bar? The armature and the field resistances are 0.05 ohms and 85 ohms respectively. Neglect armature reaction.

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The Basic Rate Interface (BRI) of ISDN has a total bit rate of

.

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In a broadcast superheterodyne receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz, calculate the Image Frequency Rejection Ratio (IFRR) in dB at 1000Khz signal frequency.