12. Engines
12.1. General provisions
12.1.1. Engines should:
be so constructed and installed that they can be started safely;
be so constructed and installed that the maximui safe speed
cannot be exceeded;
have remote controls for limiting speed; and
have devices that will enable them to be stopped from a safe
place in emergencies.
12.1.2. Engines should be operated by competent persons.
12.1.3. On engines, moving parts such as flywheels, driving
belt pulleys, cranks and crossheads should be enclosed or ade-
quately guarded.
12.2. Internal combustion engines
12.2.1. Starting cranks of internal combustion engines should
have double bearings or be otherwise effectively secured against
kicking back.
12.2.2. Internal combustion engines should not be started up
with oxygen or combustible gases.
12.2.3. Exhaust gases from internal combustion engines should
be so led off that the attendant and other persons in the vicinity are
not exposed to them.
12.2.4. Internal combustion engines, such as those of tractors
and motor vehicles, should not run for long periods of time in
closed premises unless adequate mechanical ventilation is provided
or gases are directly exhausted outside or the equipment is provided
with a fume scrubber.
12.2.5. When internal combustion engines are being fuelled:
(a) suitable equipment such as pumps, hoses and nozzles should
be used;

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