Which of the followings is true for a system in steady state?
(a) The system is unchanging in time.
(b) The rate of accumulation of stuff in the system is 0.
(c) Both (a) and (b)
Answer: the followings is true for a system in steady state :
In a steady state system what amount of material goes in the same amount comes out, so the overall mass remains constant.
Which of the followings is true for a system in steady state? (a) The system is...
QUESTION 1 Which statement is not true about the concept of steady state diffusion as it applies to diffusion. Steady-state diffusion is the situation wherein the rate of diffusion into a given system is just equal to the rate of diffusion out There is no net accumulation or depletion of diffusing species the diffusion flux is independent of time None of the above All of the above QUESTION 2 What is the driving force for steady-state diffusion? Temperature Concentration gradient...
a. A batch reactor is always at steady state (True False) b. The actual hydraulic detention time is always greater than the theoretical (True / False) c. The accumulation term in a mass balance is set to zero for steady state conditions (True False) d. The generation term in a mass balance for a tracer study is set to zero (True False) e. The rate of deoxygenation at any point is proportional to the BOD remaining (True / False) f....
Which of the followings is true regarding the continuity equation? (a) v1A1 = v2A2 (b) ρ1v1A1 = ρ2v2A2 (c) Both (a) and (b) (d) None of the above
A requirement for steady state analysis of a queuing system is that: a. the analysis period is at least two hours b. the service rate must be constant c. the waiting time must be exponentially distributed d. the initial conditions are still in effect
What is an example of a chemical system which is at steady state? A day to day example possibly?
Find the steady state error constants and the steady-state error response for the digital control system shown below, if the inputs are: a. Unit Step, u(t) b. Unit Ramp, t u(t) c. Unit Parabola, 0.5t2u(t) 2. R(s) + C(s) s(s 2) T=0.1
Consider the liquid level system shown in Figure 1. At steady state, the inflow rate and outflow rate are both Ở and the flow rate between the tanks is zero. The heads at tank 1 and tank 2 are both H. At t = 0, the inflow rate is changed from 0 to + , where is the small change in the inflow rate. The resulting changes in the heads (h/ and h2) and flow rates are assumed to be...
For the system shown below state the system type, and find the steady state error for an input of 50u(), 50rl(t), 5012U(t) 2. C(s) (s3) (Hint: Close the inner-loop first to get the standard unity feedback system with loop transfer function G(s)+3 +7s +15 For the system shown below state the system type, and find the steady state error for an input of 50u(), 50rl(t), 5012U(t) 2. C(s) (s3) (Hint: Close the inner-loop first to get the standard unity feedback...
QUESTION 10 Which of the followings is not true? a. a) Water moves fast in aquifers, velocity can reach 100 feet per day in sandy unconfined aquifers b. a) Much more freshwater is stored in aquifers than in lakes. c. a) Stream discharge may decrease due to groundwater extraction. d. a) Direction of groundwater in a aquifer can change due to groundwater extraction. Which of the followings is not true? Water levels in aquifers change due to pumpage. Around clusters of pumping wells, cone...
3- Consider the following system. a) b) Select Ki so that the steady state error is zero. Determine the percent overshoot P.O. and the time to peak To of the unit step response when Ki is as in part (a). R(G) 3- Consider the following system. a) b) Select Ki so that the steady state error is zero. Determine the percent overshoot P.O. and the time to peak To of the unit step response when Ki is as in part...