If the bolt is preloaded to 75% of its proof load, and the joint experiences tension ranging from 0 to 12,000 lbs, determine the margin of safety against member gapping.

Determine the stoichiometric and actual air-fuel ratios and the mole flue gas composition for combustion with 15% excess air for raw indiana, pennsylvania raw coal.

In an engine working on the diesel cycle the ratios of the weights of air and fuel supplied is 50: 1. the temperature of air at the beginning of the compression is 60 °c and the compression ratio used is 14: 1. what is the ideal efficiency of the engine. calorific value of fuel used is 42000 kj/kg. assume c, = 1.004 kj/kg k and c 0.717 kj/kg k for air

Silicon is an intrinsic semiconductor. adding a small amount of phosphorus provides extra electrons. as a resuit, phosphorus is an p-type dopant. (true , false )