Michigan CDL Tanker case studies
Michigan CDL Tanker · Put your knowledge to work in context.
The Michigan CDL Tanker endorsement (knowledge test N) is the state knowledge requirement a commercial driver must satisfy before operating a tank vehicle on Michigan roads. It is written for drivers who already hold or are working toward a Michigan commercial driver's license and who expect to haul liquids in bulk - fuel, milk, chemicals, food-grade products, or other bulk liquid cargo - where the vehicle's tank is the reason the endorsement exists. The Michigan CDL Tanker case studies are 5 cases and about 2,917 words.
1Ethanol Load After Gasoline: Overfill Sensor and Tank Cleanliness Decision
At 06:40 a driver arrives at a terminal with a 4,200-gallon DOT-406 aluminum cargo tank divided into four compartments rated 1,200, 1,100, 1,100, and 800 gallons. The previous load was 3,500 gallons of regular gasoline, unloaded 18 hours earlier; the tank was drained but not washed.
651 words, about 3 min2Forward Surge on a Partially Loaded Smooth-Bore Tank
On a clear afternoon a driver is descending a 5 percent grade on a two-lane off-ramp posted 25 mph. The tractor-trailer is a 6,500-gallon smooth-bore cargo tank (no internal baffles) carrying 3,575 gallons of a liquid with a density of 6.5 lb/gal, about 55 percent of capacity.
621 words, about 3 min3Decreasing-Radius Loop Ramp With Residual Liquid in an Empty Tank
A driver is pulling an empty 5,500-gallon insulated cargo tank with about 900 gallons of residual liquid in the last compartment. The tank’s center of gravity is high, and the route requires a 270-degree loop ramp with a decreasing radius; the ramp is posted 20 mph and is wet from recent rain.
557 words, about 3 min4Caustic Unloading Leak at a Customer Rack
At a customer’s unloading rack a driver is transferring 3,000 gallons of 50 percent sodium hydroxide solution (UN1824, Class 8, PG II) from a DOT-407 cargo tank through a 2-inch pump and hose. The driver is wearing a faceshield, nitrile gloves, and a long-sleeve cotton shirt.
549 words, about 3 min5Vacuum Collapse During Gravity Unloading of Diesel
At a farm fuel depot a driver is gravity-unloading 1,800 gallons of diesel from a 4,000-gallon DOT-406 cargo tank into an aboveground storage tank. The cargo tank’s normal vent is located on top of the tank and is fitted with a flame arrester; the driver notices the vent screen is packed with mud and insect debris from the last rain.
539 words, about 3 min