De Beata Vita

251. If the Kelvin temperature of an ideal gas is doubled, what happens to the rms speed of the molecules in the gas?

 a. it increases by a factor of square root of 2

 b. it increases by a factor of 2

 c. it increases by factor of 4

 d. none of the above 252. A function of state that is

associated with disorder in the system and environment.

 a. enthalpy

 b. entropy

 c. law of diminishing return

 d. Lenz’ Law

253. No volume changes occur during this type of process

 a. Isobaric process

 b. Isomillimetric process

 c. Isocaloric process

 d. Isochoric process

254. The boiling of water into steam in an open container is an example of a/an _________ process.

 a. adiabatic

 b. isochoric

 c. isobaric

 d. zero work

255. When liquid water is converted to steam at 100˚C, the entropy of water

 a. increases

 b. decreases

 c. remains the same

 d. none of the above 256. Only energy can cross the boundaries.

 a. Closed system

 b. Open system

 c. Isolated system

 d. Isoenergetic system

257. The temperature at which the vapor pressure exactly equals one atm is called _________.

 a. boiling temperature

 b. normal boiling point

 c. triple point

 d. point of infliction

258. Mixture of liquid and steam of the same substance in which both are at saturation temperature.

 a. dry steam

 b. current steam

 c. wet steam

 d. aerosol

259. The term _________ is traditionally used to describe steam issuing from condensate receiver vents and open-ended condensate discharge lines from steam traps.

 a. dry steam

 b. wet steam

 c. phase steam

 d. flash steam

260. Defined as the ratio of weight of dry steam to the weight of stuff.

 a. dryness fraction

 b. Vaporization

 c. fusion

 d. super heated steam

261. What device measures infrared radiation below?

 a. thermocouple

 b. thermopile

 c. thermodynamic device

 d. thermos

262. When an object undergoes thermal expansion,

 a. any holes in the object expand as well

 b. any holes in the object remain the same

 c. mass increases

 d. molecular activities would cease

263. _________ is the quantity of heat required to raise the temperature of one pound of water 1 F˚ from 63 ˚F to 64 ˚F.

 a. one Joule

 b. one calorie

 c. one watt

 d. one BTU

264. Boiling temperature of a material is dependent on its _________.

 a. volume

 b. power

 c. heat

 d. pressure

265. Thermos was invented by _________.

 a. Sir Arthur Conan Doyle

 b. Sir Fredrich the Great

 c. Thomas Edison

 d. Sir James Dewar

266. Most cooking activities involve _________ process.

 a. Isochoric

 b. Isothermal

 c. Isobaric

 d. Isovolumic

267. Adiabatic heating and Adiabatic cooling really means _________ and _________ respectively.

 a. raising the temp and lowering the temp

 b. maintaining the pressure and changing the temperature

 c. decreasing the volume and increasing the pressure

 d. lowering the temp and raising the temp

268. The statement “heat cannot by itself flow from one body into a hotter body” is governed by _________.

 a. the first law of thermodynamics

 b. the second law of thermodynamics

 c. the third law of thermodynamics

 d. the zeroth law of thermodynamics

269. It is impossible for any process to have as its sole result the transfer of heat from a cooler to a hotter body

 a. Carnot’s statement

 b. Clausius statement

 c. Rankine statement

 d. Gauss statement

270. _________ is the average distance a molecule moves before colliding with another molecule.

 a. mean free path

 b. path allowance

 c. compacting factor

 d. molecular space

271. Find the pressure due to a column of mercury 74.0 cm high.

 a. 91.80 x 10^3 N/m^2

 b. 73.56 x 10^2 N/m^2

 c. 9.86 x 10^4 N/m^2

 d. 87.2 x 10^4 N/m^2

272. Roughly what is the total weight of air in the entire earth?

 a. 1 x 10^5 tons

 b. 2 x 10^6 tons

 c. 6 x 10^15 tons

 d. 8 x 10^10 tons

273. _________ is defined as that equivalent to the pressure due to a column of mercury 76cm long.

 a. surface pressure

 b. gage pressure

 c. standard atmospheric pressure

 d. isobaric pressure

274. If any external pressure is applied to a confined fluid, the pressure will be increased at every point in the fluid by the amount of the external pressure is known as _________.

 a. Torricelli’s law

 b. Barometric law

 c. Newton’s Second law

 d. Pascal’s law

275. What type of pressure cannot be used for Boyle’s Law?

 a. Atmospheric Pressure

 b. Gauge Pressure

 c. Surface Pressure

 d. Isobaric Pressure

276. To displace a cubic foot of fresh water, you need _________ force.

 a. 62.4 lb

 b. 9.81 lb

 c. 76 lb

 d. 760 lb

277. The force per unit length across such a line in the surface is called _________.

 a. force per length

 b. surface tension

 c. Pressure

 d. Density

278. The speed at which a liquid

escapes from a vessel through an orifice is given by _________.

 a. Archimedes Principle

 b. Evangelista’s Law

 c. Torricelli’s Theorem

 d. Bernoulli’s Equation 279. The process of one substance mixing with another because of

molecular motion is called _________.

 a. diffusion

 b. viscosity

 c. streamline flow

 d. solution

280. When was the Ninth General Conference on Weights and Measures decided to abandon centigrade and used Celsius Instead?

 a. 1950

 b. 1936

 c. 1957

 d. 1948

281. _________ is the temperature to which the air must be cooled, at constant pressure, to produce saturation.

 a. relative humidity

 b. triple point temperature

 c. dew point

 d. critical point

282. _________ is a succession of changes that ends with the return of the body or system to its initial state.

 a. process

 b. system

 c. equilibrium

 d. cycle

283. Intensive properties of a system are called _________.

 a. Bulk Properties

 b. Innate Properties

 c. Natural Properties

 d. Inside Properties

284. In thermodynamics, a throttling process, also called a _________, is a type of isenthalpic process where a liquid or gas is cooled as it passes from a higher pressure state to a lower pressure state.

 a. Rankine Process

 b. Carnot Cycle

 c. Joule-Thomson process

 d. Refrigeration process

285. Gasoline and Diesel Engines are best described by the _________.

 a. Otto Cycle

 b. Burnign Cycle

 c. Shikki Cycle

 d. Shapa R’ Elli Cycle

286. Twenty grams of ice at 0˚C melts to water at 0˚C. How much does the entropy of the 20g change in this process?

 a. 30.5 J/K

 b. 24.6 J/K

 c. 21.3 J/K

 d. 15.7 J/K

287. The first law of thermodynamics is based on which of the following

principles?

 a. conservation of mass

 b. the enthalpy-entropy relationship

 c. action – reaction

 d. conservation of energy

288. If a system absorbs 500 cal of heat at the same time does 400J of work, find the change in internal energy of the system.

 a. 1400 J

 b. 1700 J

 c. 1900 J

 d. 1500 J

289. A gas is enclosed in a cylinder with a weighted piston as the top boundary.

The gas is heated and expands from a volume of 0.04 m³ to 0.10 m³ at a constant pressure of 200 kPa. Find the work done on the system.

 a. 5 kJ

 b. 15 kJ

 c. 10 kJ

 d. 12 kJ

290. A simple steam engine receives steam from the boiler at 180˚C and exhausts directly into the air at 100˚C.

What is the upper limit of its efficiency?

 a. 11.28 %

 b. 36.77 %

 c. 20.36 %

 d. 17.66 %

291. Heat which causes a change in temperature of a substance.

 a. Latent heat

 b. Sensible heat

 c. Specific heat

 d. Heat of Fusion

292. Who coined the term latent heat?

 a. John Thompson

 b. Studey Baker

 c. Joe di Maggio

 d. Joseph Black

293. Which of the following cannot be measured by a thermometer?

 a. Latent Heat

 b. Sensible Heat

 c. Specific Heat

 d. Heat of Fusion

294. It is generally accepted as a law of nature that although one may closely approach 0 Kelvin it is impossible actually to reach it.

 a. First Law of thermodynamics

 b. Second Law of thermodynamics

 c. Third Law of thermodynamics

 d. Zeroth Law of thermodynamics 295. One calorie is equal to _________.

 a. 1/180 W.h

 b. 1/860 W.h

 c. 1/360 W.h

 d. 1/250 W.h

296. A _________ is a reversible

process in which there is transfer of heat and takes place according to the relation pVⁿ = C where n is any constant.

 a. Polytropic process

 b. Entropy

 c. Ideal Gas Law

 d. Carnot Cycle

297. The flow through an open system is _________ if all properties at each point within the system remain constant with respect to time.

 a. streamline flow

 b. steady flow

 c. constant flow

 d. algebraic flow

298. The most efficient cycle that can operate between two constant

temperature reservoir is the _________.

 a. Otto Cycle

 b. Lazare Cycle

 c. Isothermal Cycle

 d. Carnot Cycle

299. The flow energy of 150 L of a fluid passing a boundary to a system is 110 kJ. Determine the pressure at this point

 a. 733.33 kPa

 b. 833.33 kPa

 c. 933.33 kPa

 d. 633.33 kPa

300. Who is the father of thermodynamics?

 a. Lazare Carnot

 b. Sadi Carnot

 c. William Thompson

 d. Rudolf Classius

In document Cristian David Ávila Valbuena (página 40-43)