Machine Foundation and Chimney ELEMENTS

Foundations are preferably built of concrete in the proportion of what measure of Portland cement: sand: crushed stones?

• 1 : 2 : 5

• 2 : 4 : 6

• 2 : 3 : 5

• 1 : 2 : 4

For design stability, the center of gravity of the total combined engine, driven equipment, and foundation should be kept ______.

• anywhere

• above the foundation top

• in line with surface of the foundation

• below the foundation top

The machine foundation must have a factor of safety of

• 4

• 5

• 6

• 7

The diesel engine foundation safe soil bearing pressure is:

• 4890 kg/cm²

• 4500 kg/cm²

• 4490 kg/cm²

• 4125 kg/cm²

Anchor bolts in a machine foundation should be embedded in concrete of at least how many time of the bolt diameter

• 15

• 20

• 30

• 25

As a good practical rule, the foundation depth may be taken as how many times of the engine stroke?

• 2.2 to 3.2

• 3.2 to 4.2

• 2.5 to 3.5

• 3.5 to 4.5

To secure the belts embedded within the foundation, the distance of the edges of the foundation from the bedplate must be ______.

• 120 mm to 300 mm

• 150 mm to 330 mm

• 100 mm to 280 mm

• 200 mm to 380 mm

The weight of the foundation is how many times of the weight of the engine?

• 4 to 5 times

• 3 to 5 times

• 2 to 3 times

• 4 to 6 times

To eliminate transmission of vibration, the foundation should be isolated from floor slabs or building footings at least how many mm around its perimeter?

• 15

• 20

• 25

• 30

The minimum vertical distance from the floor or soil level to the top edge of the foundation must be around ____.

• 150 mm

• 100 mm

• 200 mm

• 120 mm