[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR7.82]

[Page 28-29]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 7--TESTING BY APPLICANT OR THIRD PARTY--Table of Contents
 
  Subpart E--Diesel Engines Intended for Use in Underground Coal Mines
 
Sec. 7.82  Definitions.

    In addition to subpart A definitions of this part, the following 
definitions apply in this subpart.
    Brake Power. The observed power measured at the crankshaft or its 
equivalent when the engine is equipped only with standard auxiliaries 
necessary for its operation on the test bed.
    Category A engines. Diesel engines intended for use in areas of 
underground coal mines where permissible electric equipment is required.
    Category B engines. Diesel engines intended for use in areas of 
underground coal mines where nonpermissible electric equipment is 
allowed.

[[Page 29]]

    Corrosion-resistant material. Material that has at least the 
corrosion-resistant properties of type 304 stainless steel.
    Diesel engine. Any compression ignition internal combustion engine 
using the basic diesel cycle where combustion results from the spraying 
of fuel into air heated by compression.
    Exhaust emission. Any substance emitted to the atmosphere from the 
exhaust port of the combustion chamber of a diesel engine.
    Intermediate speed. Maximum torque speed if it occurs between 60 
percent and 75 percent of rated speed. If the maximum torque speed is 
less than 60 percent of rated speed, then the intermediate speed shall 
be 60 percent of the rated speed. If the maximum torque speed is greater 
than 75 percent of the rated speed, then the intermediate speed shall be 
75 percent of rated speed.
    Low idle speed. The minimum no load speed as specified by the engine 
manufacturer.
    Maximum torque speed. The speed at which an engine develops maximum 
torque.
    Operational range. All speed and load (including percent loads) 
combinations from the rated speed to the minimum permitted engine speed 
at full load as specified by the engine manufacturer.
    Particulates. Any material collected on a specified filter medium 
after diluting exhaust gases with clean, filtered air at a temperature 
of less than or equal to 125  deg.F (52  deg.C), as measured at a point 
immediately upstream of the primary filter. This is primarily carbon, 
condensed hydrocarbons, sulfates, and associated water.
    Percent load. The fraction of the maximum available torque at an 
engine speed.
    Rated horsepower. The nominal brake power output of a diesel engine 
as specified by the engine manufacturer with a specified production 
tolerance. For laboratory test purposes, the fuel pump calibration for 
the rated horsepower must be set between the nominal and the maximum 
fuel tolerance specification.
    Rated speed. Speed at which the rated power is delivered, as 
specified by the engine manufacturer.
    Steady-state condition. Diesel engine operating condition which is 
at a constant speed and load and at stabilized temperatures and 
pressures.
    Total oxides of nitrogen. The sum total of the measured parts per 
millions (ppm) of nitric oxide (NO) plus the measured ppm of nitrogen 
dioxide (NO2).