Okay, here are the answers for "Old Singapore Quiz (18) - Old Object". Thanks to Tom for his timely reminder.
Icemoon obviously knew the answers as he was at this location recently to take photos for this post. But he was such a gentleman that he did not give the game away.
YG not only didn't know the answer but misread the quiz as he asked "Why close the quiz?" the very next day when all I said was that Icemoon was interested in war relics.
Chun See was the first to guess the object correctly, followed by Tom, Anonymous (No. 2 on 15 Aug 10) and finally Peter Stubbs. But no one gave the correct answer for Question no. 2, i.e. "Where is this object located? (Provide the name of the building or the road name)".
Yes, the object is a weapon. More specifically, it is a mortar.
This plaque near the object says, "This mortar, probably a World War II relic used by the British, was found during excavation for the Annex Wing of this building. (Conservation and installation funded by Singa Development Pte Ltd)".
And the building in question is none other than the Peranakan Museum which is located in Armenian Street. The mortar is situated on the left side of the above photo. It is the side of the building which is facing the public open-air carpark.
Tao Nan School occupied this building from 1910 to 1981 when it moved to Marine Crescent. (Both my sons studied in the new Tao Nan School in Marine Crescent).