Q&A Hero

Q: Which is greater? a. 1 kilometer b. 1 mile

Q: Which of the following are "length" or "length-related" dimensions? a. Distance b. Area and volume c. Diameter and circumference d. All of the above

Q: If you were to measure the cross section of a 2 x 4 you would find it to be 1.5 inches wide by 3.5 inches tall. What are the numbers "1.5 inches by 3.5 inches" called? a. Actual size b. Nominal size c. Finished size d. Total size

Q: If you were to measure the cross section of a 2 x 4 you would find it to be 1.5 inches wide by 3.5 inches tall. What do the numbers "2 x 4" refer to? a. Actual size b. Nominal size c. Approximate size d. Rough size

Q: Coordinate systems are used to locate things with respect to a known origin. a. True b. False

Q: Length is one of the seven fundamental or base dimensions a. True b. False

Q: What is the SI unit for torque? a. N.m b. kg.m c. N/m d. kg/m

Q: What is the SI unit for power? a. W b. J/S c. kg.m2/s3 d. All of the above

Q: What is the SI unit for pressure? a. Pa b. N/m2 c. kg/m.s2 d. All of the above

Q: What is the SI unit for angular velocity? a. m/s b. rad/s c. cm/s d. mm/s

Q: What is the SI unit for momentum? a. kg.m/s b. N.m/s c. m/s2 d. m2/s

Q: A 500 sheet rim of copy paper has a thickness of 2.25 inch. What is the average thickness of each sheet in mm? a. 0.11 mm b. 1.1 mm c. 11 mm d. none of the above

Q: The acceleration due to gravity at the surface of the moon is approximately 1/6 of the earth's. The acceleration due to gravity at the surface of moon is equal to: a. 1.6 ft/s2 b. 64 in/s2 c. 5.4 m/s2 d. none of the above

Q: The Btu (British thermal unit) is defined as the amount of heat required to raise the temperature of 1 lbm of water by 1F. If a home has a furnace that is rated at 1000 Btu/min what is this rating in kW? a. 17.584 kW b. 17584 kW c. 293 kW d. 0.293 kW

Q: A barrel can hold 42 gallons of oil. How many liters of oil are in the barrel? a. 15.9 liters b. 42 liters c. 159 liters d. 4.2 liters

Q: A one degree temperature difference in Celsius is equal to one degree temperature difference in Kelvin. a. True b. False

Q: A one degree temperature difference in Fahrenheit is equal to one degree temperature difference in Rankine. a. True b. False

Q: A one degree temperature difference in Fahrenheit is equal to one degree temperature difference in Celsius. a. True b. False

Q: The density of steel is approximately 7600 kg/m3. Express the density in BG and U.S. Customary units.

Q: An individual running on a treadmill machine generated an average power of approximately 0.27 hp. Express this power in Watts.

Q: A swimming pool is 50 m long, 10 m wide and 3 m deep. Express the volume of the water in the swimming pool in ft3 and gallons.

Q: A parking lot is long by wide. Express the area of the garden in m2and acres.

Q: Express the work done [work = (force)(distance)] by a 100 lbf force exerted over a distance of 50 ft using SI units.

Q: Convert the following: a. to b. to gallons c. to kW

Q: A motorcyclist who weighs 160 lbf accelerates his motorcycle at a rate of 10 ft/s2 over a distance of 100 yards in 5 seconds. Convert all of the values given to SI units.

Q: An engineering professor weighs 200 lbf. Express the mass and the weight of the professor in SI and U.S. Customary units.

Q: Determine the number of significant digits for the following numbers: Number of Significant Digits 7.8 109.3 0.003856

Q: The absolute pressure of a fluid point at a certain depth can be calculated using the following equation: where absolute pressure of the fluid atmospheric pressure density of fluid gravitational acceleration, depth of the point below the fluid surface What is the appropriate unit for if the preceding equation is to be homogeneous in units?

Q: The conduction heat transfer rate through a wall is modeled by the following equation: where heat transfer rate in thermal conductivity of the wall area of the wall in wall thickness in steady-state temperature difference between the inside and the outside surfaces of the wall, in What is the appropriate unit for k if the preceding equation is to be homogeneous in units?

Q: The amount of heat needed to change the temperature of an object can be calculated using the following equation: where amount of heat in Joules (J) mass of object in kilograms (kg) specific heat of object change in temperature in C What is the appropriate unit for if the preceding equation is to be homogeneous in units?

Q: The force between two charged particles can be calculated using the following equation: where force in Newtons (N) k = electrostatic constant charge of particle #1 in Coulombs (C) charge of particle #2 in Coulombs (C) distance between particles in meters (m) What is the appropriate unit for k if the preceding equation is to be homogeneous in units?

Q: When an aluminum cookie sheet is placed in an oven and heated up, it expands due to the temperature change. The change in area of the cookie sheet is modeled using the following equation: where change in area in original area in area coefficient of thermal expansion change in temperature in What is the appropriate unit for if the preceding equation is to be homogeneous in units?

Q: The speed of sound in a fluid can be calculated using the following equation: where speed of sound in bulk modulus fluid density in What is the appropriate unit for B if the preceding equation is to be homogeneous in units?

Q: The fundamental frequency of a vibrating guitar string is modeled by the following equation: where vibration frequency in Hertz length of string in meters string tension in Newtons string density What is the appropriate unit for if the preceding equation is to be homogeneous in units?

Q: The amount of time it takes for an object bounce up and down through one complete cycle is called the "period" and is calculated using the following equation: where period in seconds mass of object in kilograms spring rate What is the appropriate unit for k if the preceding equation is to be homogeneous in units?

Q: The friction force between two surfaces is modeled using the following equation: where friction force in coefficient of friction normal force in What is the appropriate unit for if the preceding equation is to be homogeneous in units?

Q: Calculate the number of gallons of water that will fit into an aquarium with dimensions:

Q: Convert the information given in the table below from the U.S. customary units to SI units. U.S. Customary Units SI Units 60 psi 180 lbf

Q: Convert the information given in the table below from the U.S. customary units to SI units. U.S. Customary Units SI Units 60 mph and 24000 Btu/h 100 miles and

Q: Convert the information given in the table below from SI units to the U.S. customary units. SI Units U.S. Customary Units

Q: Convert the information given in the table below from SI units to U.S. Customary units.SI UnitsU.S. Customary Units90 km/hand 30 m/sand 20 m20 kg

Q: The ice at a certain hockey rink is made by freezing water that is 1.5 inch deep. How many gallons of water does it take? Approximate the rink as a by rectangle.

Q: How many times does the average human heart beat during an average lifetime (75 years)?

Q: One slug is equal to a. 32.2 lbm b. 1 lbm c. 1/32.2 lbm d. None of the above

Q: Write the fundamental SI units adjacent to each of the fundamental dimension given. Length _________ Temperature _________ Electrical Current _________ Time _________ Luminous intensity _________ Mass _________ Amount of a substance _________

Q: Which of the following are U.S. Customary units? a. gallons, yards, horsepower b. barrels, Fahrenheit, Watts c. acres, hectares, liters d. cubic yards, Pascals, Joules

Q: Which of the following are fundamental British Gravitational units? a. seconds, meters, liters b. pound force, seconds, feet c. Newton, seconds, kilograms d. seconds, kilograms, Kelvins e. hours, meters, Watts

Q: Which of the following are fundamental SI units? a. seconds, meters, liters b. seconds, meters, grams c. Newton, seconds, kilograms d. seconds, kilograms, Kelvins e. hours, meters, Watts

Q: Which of the following are fundamental dimensions: a. area, volume, power, pressure, energy b. temperature, time, mass, length c. force, energy, power, weight d. heat, power, power, weight e. electric resistance, electrical voltage, electric power

Q: What is the difference between "dimensions" and "units?"

Q: We need not only physical dimensions to describe our surroundings but also some way to scale or divide these physical dimensions. a. True b. False

Q: Dimensionis a physical quantity, such as length, time, mass, or temperature, that makes it possible for us to communicate. a. True b. False

Q: Engineers shall not accept compensation, financial or otherwise, from more than one party for services on the same project, or for services pertaining to the same project, unless the circumstances are fully disclosed and agreed to by all interested parties. a. True b. False

Q: Engineers shall issue no statements, criticisms, or arguments on technical matters that are inspired or paid for by interested parties, unless they have prefaced their comments by explicitly identifying the interested parties on whose behalf they are speaking, and by revealing the existence of any interest the engineers may have in the matters. a. True b. False

Q: Engineers may accept assignments and assume responsibility for coordination of an entire project and shall sign and seal the engineering documents for the entire project, including each technical segment of the plans and documents. a. True b. False

Q: Engineers may express publicly technical opinions that are founded upon knowledge of the facts and competence in the subject matter. a. True b. False

Q: Engineers shall undertake assignments only when qualified by education or experience in the specific technical fields involved. a. True b. False

Q: Engineers shall not reveal facts, data or information without the prior consent of the client or employer except as authorized or required by law or this Code. a. True b. False

Q: Engineers may not be required to follow the provisions of state or federal law when such actions could endanger or compromise their employer or their client's interests. a. True b. False

Q: Professional responsibility is the responsibility associated with the mastery of special kind of knowledge that a person possesses and the use of knowledge for well-being and benefit of the society.a. Trueb. False

Q: The NSPE Engineer's Creed include: a. To give the utmost of performance; b. To participate in none but honest enterprise; c. To live and work according to the laws of man and the highest standards of professional conduct d. To place service before profit e. All of the above

Q: The engineer's creed was developed to state the engineering philosophy of service in a lengthy way. a. True b. False

Q: Engineers shall perform services only in the areas of their competence. a. True b. False

Q: Engineers must perform under a standard of professional behavior that requires adherence to the highest principles of ethical conduct. a. True b. False

Q: The services provided by engineers do not require honesty, impartiality, fairness, and equity, and must be dedicated to the protection of the public health, safety and welfare. a. True b. False

Q: Engineering is an important and learned profession. As members of this profession, engineers are expected to exhibit the highest standards of honesty and integrity. a. True b. False

Q: A conflict of interest is a. a general disagreement between two or more individuals. b. when an employee spends company time working on a personal project c. a conflict between an employee and his/her manager. d. a conflict between an individual's personal interests and his/her professional obligations.

Q: The NSPE ethical code of conduct is used in making judgments about engineering ethic-related cases that are brought before the NSPE's Board of Ethics Review. a. True b. False

Q: Most engineering professional societies have their own code of ethics a. True b. False

Q: Ethics refers to the study of morality and the moral choices that we all have to make in our lives. a. True b. False

Q: _____________ are a "language" used by engineers to convey their ideas, solutions to problems, or analyses of certain situations. a. engineering symbols b. hieroglyphics c. color-coding d. dimensions

Q: Engineering drawings typically convey all of the following vital information except a. shape b. size c. type of material d. cost

Q: Engineering drawings convey vital information, such as: a. shape b. size c. type of material d. assembly steps e. all of the above

Q: It is a good idea to rehearse your presentation and ask a friend to listen and provide suggestions about your style of presentation, delivery, and content of the talk. a. True b. False

Q: The oral technical presentation in many ways is not similar to a written one. You do not need to be well organized and have an outline of your presentation ready, similar to the format for a written report. a. True b. False

Q: Your oral presentation may show the results of all your efforts regarding a project. If the listener cannot follow how a product was designed or how the analysis was performed, then all your efforts become insignificant. a. True b. False

Q: In a formal presentation there are certain rules and strategies that you need to follow. a. True b. False

Q: Engineering presentations are typically verbal reports and rarely include calculations, graphs, charts, and engineering drawings. a. True b. False

Q: Presentations are an integral part any engineering project. a. True b. False

Q: In a technical report, the table numbers and the titles should be placed above the tables. a. True b. False