Which of these terms of the momentum equations are altered by the transient term in the PISO algorithm?

Which of these terms is added to the source term of the momentum equations of the transient PISO algorithm?

A

product of the latest central coefficient and latest velocity

B

product of the current central coefficient and previous velocity

C

product of the previous central coefficient and previous velocity

D

product of the initial central coefficient and current velocity

Which of these equations are altered by the transient term in the PISO algorithm?

A

both the first and second pressure-correction equations

B

only the first pressure-correction equation

C

only the second pressure-correction equation

D

neither the first nor the second pressure-correction equations

The PISO algorithm for the transient problem is _________

A

iterative

B

non-iterative

C

never converging

D

fast converging

In which of these steps are the pressure-correction equations obtained in the PISO algorithm?

A

The first predictor step

B

The first corrector step

C

The second predictor step

D

The second corrector step

Which of these equations is solved by the PISO algorithm in the extra corrector step?

A

Pressure-correction equation

B

Pressure equation

C

Continuity equation

D

Momentum equation

Which of these characteristics of the PISO algorithm match with the SIMPLE algorithm?

A

No extra equation

B

Extra equation

C

Under-relaxation factor

D

High convergence

The order of temporal accuracy achieved by the PISO algorithm for pressure and momentum are ___________ and ___________ respectively.

A

four, three

B

two, three

C

three, four

D

four, two

In a power system, which of the following is/are critical clearance time of a fault related to? 1. Transient reactance 2. Sub-transient reactance 3. Reactive power limit 4. Transient stability limit

A

1 and 2

B

2 only

C

3 and 4

D

4 only

How is the total angular momentum of a system J described in terms of spin angular momentum S and orbital angular momentum L?

A

J = L

B

J = L+S

C

J = 2πL + SBe\(^{-\frac{\hbar^2}{2}}\)

D

J = S2L

S₁: A man handed a pair of trousers to the departmental store-clerk and said,"I'd like these altered, please".
P: He said that free alteration is not possible without a receipt.
Q: The man said,"Okay, I'd like to return the trousers". The clerk took them back and returned his money.
R: The man pushed the money and said,"Now I want to buy them". The clerk put the trousers in a bag, issued receipt and handed him both.
S: The clerk asked for the sales receipt but after searching his pockets the man replied that he had lost it.
S₆: Triumphantly he put the trousers and the receipt on the counter and said,'I'd like to have these altered, please."

The Proper sequence should be:

A

PSQR

B

PSRQ

C

QRPS

D

SPQR

Which of these terms of the momentum equations are altered by the transient term in the PISO algorithm?

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