Ashaft carrying an idler sheave for a belt drive system is to have a nominal size of 2 in. the sheave must rotate reliably on the shaft, but with the smoothness characteristic of accurate machinery.

specify the limits of size for: .
the shaft .
the sheave bore -
list the limits of clearance that will result.

note: the design size of the hole is the basic size and the allowance should be applied to the shaft (basic hole system)

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.