Q17: Which of the Separation Schemes shown below would you recommend for the given FEED composition (mole%)?
A. Separation Scheme – I
B. Separation Scheme – II
C. Separation Scheme – III
D. Insufficient Information
D; Stream G1 will largely be C1 and L1 will be largely C6+; depending on the available pressure, either scheme II or scheme III could have been recommended. If FEED pressure is too low, then scheme II will not provide any distinct advantage over scheme III. On the contrary, for high FEED pressure, it’d be worthwhile to have an intermediate stage separation in scheme II or else there will be excess vapour loss, mainly C1, in Stock Tank. So, insufficient information to decide between Scheme II and III.
Q18: A Conman buys books worth 35$ from a charity shop selling goods at cost price.The Conman gives the seller a 100$ bill. The shopkeeper does not have change and therefore, gets it from the next shop; he then keeps 35 US$ for himself and returns 65$ to the Conman.
Later the shopkeeper of the next shop comes with the 100$ note saying it was a counterfeit bill and therefore, takes his money back.
“How much LOSS did the Charity shopkeeper face ?”
The bookkeeper had to pay 65$ from his pocket to return 100$ to the 2nd shopkeeper. Additionally, he lost books 35$ worth books to the Conman for nothing and therefore, the loss to bookseller is = 65 + 35 = 100$.