EIAT and NEIEP Test EIAT Mechanical 3

Question 1

A belt connects a 4-inch drive pulley spinning at 1,200 RPM to a 12-inch driven pulley. What is the speed of the driven pulley?

Accepted Answer

400 RPM

Answer

Speed ratio = drive diameter / driven diameter = 4/12 = 1/3, so 1,200 × (4/12) = 400 RPM.

Question 2

A spring with a spring constant of 20 lb/in is compressed 3 inches. How much force is required to hold it in the compressed position?

Accepted Answer

60 lb

Answer

Hooke's Law: F = k × x = 20 lb/in × 3 in = 60 lb.

Question 3

Which class of lever has the effort between the fulcrum and the load?

Accepted Answer

Third class

Answer

A third-class lever has the effort between the fulcrum and load, providing a mechanical advantage less than 1 but greater speed and range of motion.

Question 4

A pipe with a 4-inch diameter is connected to a pipe with a 2-inch diameter. If water flows at 2 ft/s in the large pipe, how fast does it flow in the small pipe?

Accepted Answer

8 ft/s

Answer

Continuity equation: A1×v1 = A2×v2; area ratio is (4²)/(2²) = 4, so v2 = 2 × 4 = 8 ft/s.

Question 5

What is the primary function of a flywheel in a mechanical system?

Accepted Answer

To store rotational kinetic energy and smooth out speed variations

Answer

A flywheel stores rotational energy and releases it to maintain constant speed during load variations.

EIAT and NEIEP Test Practice Test

EIAT and NEIEP Test Practice Test

EIAT and NEIEP Test EIAT Mechanical 3