QUES: The continuous torque density of conventional electric machines is determined by the size of the air-gap area and the back-iron depth, which are determined by the power rating of the armature winding set, the speed of the machine, and the achievable air-gap flux density before core saturation. Despite the high coercivity of neodymium or samarium-cobalt PMs, continuous torque density is virtually the same amongst electric machines with optimally designed armature winding sets. Continuous torque density relates to method of cooling and permissible period of operation before destruction by overheating of windings or PM damage.

What does continuous torque density refer to?
What is the answer?
ANS: method of cooling and permissible period of operation before destruction by overheating
QUES: Hydrogen gas was first artificially produced in the early 16th century, via the mixing of metals with acids. In 1766–81, Henry Cavendish was the first to recognize that hydrogen gas was a discrete substance, and that it produces water when burned, a property which later gave it its name: in Greek, hydrogen means "water-former".

When was hydrogen gas artificially produced for the first time?
What is the answer?
ANS: early 16th century
QUES: Southern Baptist Landmarkism sought to reset the ecclesiastical separation which had characterized the old Baptist churches, in an era when inter-denominational union meetings were the order of the day. James Robinson Graves was an influential Baptist of the 19th century and the primary leader of this movement. While some Landmarkers eventually separated from the Southern Baptist Convention, the influence of the movement on the Convention continued into the 20th century. Its influence continues to affect convention policies. In 2005, the Southern Baptist International Mission Board forbade its missionaries to receive alien immersions for baptism.

When did the Southern Baptist International Mission Board forbade its missionaries to receive alien immersions for baptism?
What is the answer?
ANS:
In 2005