Measurement and Conversion Flashcards

A motor runs at 1,750 RPM. How many revolutions does it complete in 10 seconds?

Answer: 291.7 rev

1,750 RPM ÷ 60 s/min × 10 s = 291.7 revolutions.

A tension spring stretches 3.175 cm under load. What is this measurement in millimeters?

Answer: 31.75 mm

3.175 cm × 10 mm/cm = 31.75 mm.

An elevator rises 240 feet in 20 seconds. What is its speed in feet per minute?

Answer: 720 fpm

240 ft ÷ 20 s × 60 s/min = 720 feet per minute.

A sump pit holds 8.5 cubic feet of water. How many gallons is that? (1 cu ft ≈ 7.48 gal)

Answer: 63.6 gal

8.5 cu ft × 7.48 gal/cu ft ≈ 63.6 gallons.

A buffer spring is compressed 4 inches under a test load. Express this in centimeters. (1 in = 2.54 cm)

Answer: 10.16 cm

4 in × 2.54 cm/in = 10.16 cm.

A sheave has a diameter of 24 inches. What is its circumference? (C = πd, π ≈ 3.14)

Answer: 75.36 in

C = π × d = 3.14 × 24 = 75.36 inches.

A load test weight of 907.2 kg is needed. Approximately how many pounds is that? (1 kg ≈ 2.205 lbs)

Answer: 2,000 lbs

907.2 kg × 2.205 lbs/kg ≈ 2,000 lbs.