42 CFR 84.146 - Method of measuring the power and torque required to operate blowers.

§ 84.146 Method of measuring the power and torque required to operate blowers.
As shown in Figure 1 of this section, the blower crank is replaced by a wooden drum, a (13 cm. (5 inches) in diameter is convenient). This drum is wound with about 12 m. (40 feet) of No. 2 picture cord, b. A weight, c, of sufficient mass to rotate the blower at the desired speed is suspended from this wire cord. A mark is made on the cord about 3 to 4.5 m. (10 to 15 feet) from the weight, c. Another mark is placed at a measured distance (6-9 m./20-30 feet is convenient) from the first. These are used to facilitate timing. To determine the torque or horsepower required to operate the blower, the drum is started in rotation manually at or slightly above the speed at which the power measurement is to be made. The blower is then permitted to assume constant speed, and then as the first mark on the wire leaves the drum, a stopwatch is started. The watch is stopped when the second mark leaves the drum. From these data the foot-pounds per minute and the torque may be calculated.
Figure 1—Apparatus for measuring power required to operate blower. (42 CFR part 84, subpart J, § 84.146)

Title 42 published on 2014-10-01

no entries appear in the Federal Register after this date.

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code
U.S. Code: Title 29 - LABOR

29 U.S. Code § 301 to 309 - Repealed.

§ 651 - Congressional statement of findings and declaration of purpose and policy

§ 652 - Definitions

§ 653 - Geographic applicability; judicial enforcement; applicability to existing standards; report to Congress on duplication and...statutory rights, duties, or liabilities of employers and employees unaffected

§ 654 - Duties of employers and employees

§ 655 - Standards

§ 656 - Administration

§ 657 - Inspections, investigations, and recordkeeping

§ 658 - Citations

§ 659 - Enforcement procedures

§ 660 - Judicial review

§ 661 - Occupational Safety and Health Review Commission

§ 662 - Injunction proceedings

§ 663 - Representation in civil litigation

§ 664 - Disclosure of trade secrets; protective orders

§ 665 - Variations, tolerances, and exemptions from required provisions; procedure; duration

§ 666 - Civil and criminal penalties

§ 667 - State jurisdiction and plans

§ 668 - Programs of Federal agencies

§ 669 - Research and related activities

§ 669a - Expanded research on worker health and safety

§ 670 - Training and employee education

§ 671 - National Institute for Occupational Safety and Health

§ 671a - Workers’ family protection

§ 672 - Grants to States

§ 673 - Statistics

§ 674 - Audit of grant recipient; maintenance of records; contents of records; access to books, etc.

§ 675 - Annual reports by Secretary of Labor and Secretary of Health and Human Services; contents

§ 676 - Omitted

§ 677 - Separability

§ 678 - Authorization of appropriations

U.S. Code: Title 30 - MINERAL LANDS AND MINING