Vehicle Instrumentation and Safety

What do warning lights provide to the equipment operator?

• Detailed technical manuals

• Easily understood information to alert about potentially dangerous operating conditions

• Instructions for vehicle maintenance

• Weather updates

What is an example of a light that may be operated through voltage drop?

• Headlight

• Charging system indicator light

• Brake light

• Turn signal light

What do some alternator voltage regulators provide when not charging?

• A power boost

• A ground path for a bulb

• Increased voltage

• Reduced current

What is the purpose of mechanical ground switches?

• To indicate high fluid levels

• To indicate low fluid levels

• To increase air pressure

• To lock power dividers

How do normally closed pressure switches operate?

• They open with air or oil pressure

• They close with air or oil pressure

• They remain open at all times

• They remain closed at all times

What happens when the pressure in a normally closed hydraulic or air pressure switch drops below a preset amount?

• The switch remains open

• The switch closes the circuit

• The switch completes a ground circuit

• The switch increases pressure

Which of the following is a technology used in common gauge systems?

• Hydraulic

• Bimetallic

• Pneumatic

• Optical

How do dissimilar metals in a bimetal fuel gauge respond to heat?

• They expand at the same rate.

• They contract at different rates.

• They expand at different rates.

• They remain unaffected by heat.

Why do D'Arsonval gauges require a voltage regulator?

• To increase the current flow

• To maintain consistent readings

• To decrease the magnetic field

• To measure temperature

What is the purpose of the rheostat in a two-coil gauge system?

• To increase voltage

• To vary current and magnetic field strength

• To decrease resistance

• To connect to the battery