問題一覧
1
power required to overcome the friction and energy losses
friction horsepower
2
ideal prototype of spark ignition engines
otto cycle
3
if the system is constant volume, the heat will be equal to
internal energy
4
measures atmospheric pressure
barometer
5
if both the volume and the absolute temp. of a confined gas are doubled, the pressure will ____
not change
6
pressure is inversely proportional to the volume
isothermal
7
4 stroke cycle engine
diesel cycle
8
most efficient cycle conceivable
carnot cycle
9
reversible adiabatic process
isentropic
10
isothermal process, heat is equal to
mc(T2-T1)
11
process where there is no heat added or subtracted from the air
adiabatic process
12
if the change in kinetic energy is zero, the steady flow work is equal to
-SPdv
13
a quantity relating to the operation of a reciprocating engine and is a measure of an engine's capacity
mean effective pressure
14
thermodynamic quantity representing the unavailability of a system's thermal energy
entropy
15
branch of the physical sciences that treats of various phenomena of ____
energy
16
same units
heat and work
17
process where the non flow work is equal to 0
isometric
18
inverse of density
specific volume
19
formula equal to mRTIn (V1/V2) in isothermal
P1V1In (P1/P2)
20
if heat is said to be carried away from the system, the sign of heat will be
negative
21
sum of potential and kinetic energy
internal energy
22
force is directly proportional to the product of mass and acceleration
newton's 2nd law of motion
23
formula for the curve, polytropic
PVn=c
24
process where in the change in enthalpy is 0
isothermal
25
actual amount of power delivered to the propeller shaft
brake horsepower
26
formula for the curve of a polytropic
PVn=c
27
if work is done by the system, the sign of work will be
positive
28
better thermal efficiency
diesel cycle
29
formula for curve isothermal process
PV=C
30
the area under the curve of PV diagram represents
PdV
31
process where in the change in enthalpy is equal to 0
isothermal
32
process in which a temperature-entropy (T-s) diagram is represented as a vertical line
isentropic
33
correct gas constant for air
287.08J/kgK
34
states that energy is neither created nor destroyed
1st law of thermodynamics
35
result in system having potential energy
elevation
36
variable "n" for polytropic process
polytropic index
37
if the pressure on a particular quantity of gas is held constant, then, with any change of state, the volume will vary directly as the absolute temp.
charle's law
38
if n=0 for a polytropic process, the process will be?
isobaric
39
"the acceleration of a particular body is directly proportional to the resultant force acting on it and inversely proportional to its mass."
2nd law
40
process where the pv diagram is horizontal
isobaric
41
total horsepower actually developed in an engine's cylinder without reference to friction losses
indicated horsepower
42
work done for a constant volume process
zero
43
if the system is constant pressure, the heat will be equal to
enthalpy
44
fraction of the heat supplied to a thermodynamic cycle that is converted into work
thermal efficiency
45
heat being added to the system
endothermic
46
turbojet engine operates on
brayton cycle
47
unit of work
kg m^2 / s^2
48
volume is directly proportional to the temperature
isobaric
49
sum of internal energy and flow work
enthalpy
50
heat flows from areas of ____ to areas of ____
High Temp, Cold Temp
51
isentropic compression ratio and cutoff ratio
diesel cycle
52
ratio of clearance volume
clearance ratio
53
formula for isothermal
PV=k
54
The ___ of any substance is its mass per unit volume
density
55
process where in the change in internal energy is equal to 0
isothermal