Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
1) Which of the below statements is incorrect?
(A) heat imparted to a body may cause a rise in temperature (B) temperature and heat quanity of a body are one in the same (C) generally the hotter a body becomes, the greater becomes its volume (D) moving objects possess kinetic energy |
(B) temperature and heat quanity of a body are one in the same
|
|
|
2) The amount of heat required to raise the temperature of one pound of water 1 degree F at atmospheric pressure is ---
(A) one calorie (B) latent heat of fusion (C) one BTU (D) sublimation |
(C) one BTU
|
|
|
3) Convection heat transfer is the transfer of heat by ---
(A) motion (B) flow (C) takes place only in liquids and gas (D) all of the above |
(D) all of the above
|
|
|
4) Water at 4 degrees centigrade ---
(A) expands when its temperature changes (B) coefficient of expansion is negative below 4 degrees C (C) expands continuously if heated to 100 degrees C (D) all of the above |
(D) all of the above
|
|
|
5) Expansion in solids is described in three ways, as either elongation, surface or cubic expansion. The shrink-fit a gear on a shaft would be classified as ---
(A) elongation (B) surface (C) cubic (D) all of these |
(B) surface
|
|
|
6) The two metals in a compound bar or bimetalic strip must ---
(A) have different lengths (B) have the same density (C) have a different coefficients of expansion (D) be attached on one end only |
(C) have a different coefficients of expansion
|
|
|
7) All of the below but one describe steam ---
(A) seen as white fog (B) odorless (C) water in the gaseous state (D) invisible |
(A) seen as white fog
|
|
|
8) The latent heat of vaporization for 15 lbs of water at 212 degrees F and atmospheric pressure would be ---
(A) 9700 BTU (B) 14,550 BTU (C) 145,500 BTU (D) 970 BTU |
(B) 14,550 BTU
|
|
|
9) Which of the below properties cannot be found in the steam tables?
(A) specific volume (B) enthalpy (C) density (D) absolute pressure |
(C) density
|
|
|
10) The below statements regarding the Mollier Diagram are all true but one ---
(A) enthalpy values are given on each side of the diagram (B) is more accurate than the steam tables (C) temperature lines range from140 degrees F to 1000 degrees F (D) area above the saturation line is referred to as superheat region |
(B) is more accurate than the steam tables
|
|
|
11) Different kinds of matter differ in their capacity to hold heat. This difference is known as ---
(A) evaporation factor (B) coefficient of expansion (C) specific volume (D) specific heat |
(D) specific heat
|
|
|
12) The heat rate of a unit (boiler and turbo-generator) is expressed as ---
(A) BTU/KWH (B) calories/lb (C) KWH/BTU (D) calories/gram |
(A) BTU/KWH
|
|
|
13) The percentage of the generator output used for running auxiliary equipment in a large modern steam plant will be approximately ---
(A) 10 - 13 percent (B) 1 - 3 percent (C) 4 - 6 percent (D) 13 - 16 percent |
(C) 4 - 6 percent
|
|
|
14) If 10 lbs of copper is heated from 60 degrees F to 280 degrees F the heat gain in BTU would be ---
(specific heat of copper is 0.095) (A) 2.200 (B) 190 (C) 209 (D) 418.44 |
(C) 209
|
|
|
15) The mechanical equivalent of heat is given as ---
(A) 3413 BTU (B) 778 ft lbs (C) 970 BTU (D) 144 ft lbs |
(B) 778 ft lbs
|
|
|
16) A typical heat balance diagram of a regenerative cycle can be used for all of the below except for ---
(A) show the transfer of energy taking place in the heat exchange equipment (B) determine proper sizing of heat exchange equipment (C) determine the boiler fuel heat content (D) give a graphic representation of equipment operating conditions |
(C) determine the boiler fuel heat content
|
|
|
17) Gross heat rate of a unit can be determined with three of the below items; net heat rate requires a fourth item. Which of the below items is not required for figuring gross heat rate --
(A) KWH used for auxiliaries (B) KWH generated (C) weight of the fuel (D) heating value of the fuel |
(A) KWH used for auxiliaries
|
|
|
18) Which of the items below is not a true statement for solving a problem using the gas laws?
(A) absolute pressure and temperature must be used (B) the condition or state of a quanity of gas may be altered by changing its pressure, temperature, or volume (C) temperatures given in degrees centigrade may be made absolute by adding 460 (D) a change in one of the three variables (pressure, temperature, volume) will change one or both of the others |
(C) temperatures given in degrees centigrade may be made absolute by adding 460
|
|
|
19) The amount of heat required to change 1 lb of water at 32 degrees F and atmospheric pressure into steam at 212 degrees F and atmospheric pressure is most nearly --
(A) 1150 BTU (B) 144 BTU (C) 970 BTU (D) 180 BTU |
(A) 1150 BTU
|
|
|
20) The critical pressure of any substance is best described by the statement ---
(A) the pressure required to reach the boiling point (B) the pressure required to raise the boiling point of the substance to the critical temperature (C) the pressure required to lower the boiling point (D) any pressure below 2900 PSIA for water |
(B) the pressure required to raise the boiling point of the substance to the critical temperature
|
