NSC Materials & Equipment Knowledge 3 — Questions and Answers
Question 1: Which type of forklift is most suitable for use in a cold storage freezer environment?
- Standard propane forklift
- Electric forklift with cold-storage rated batteries (Correct answer)
- Diesel forklift
- Gasoline forklift
Correct answer: Electric forklift with cold-storage rated batteries
Electric forklifts with cold-storage rated batteries are designed to withstand low temperatures and avoid exhaust emissions in enclosed freezer spaces.
Question 2: What is a 'slip sheet' and how does it differ from a standard wooden pallet?
- A slip sheet is a thick wooden board; a pallet is made of plastic
- A slip sheet is a thin sheet of plastic or fiberboard that replaces a pallet and requires a push/pull attachment (Correct answer)
- A slip sheet is used only for refrigerated goods
- A slip sheet is a protective cover placed over fragile loads
Correct answer: A slip sheet is a thin sheet of plastic or fiberboard that replaces a pallet and requires a push/pull attachment
Slip sheets are flat, thin platforms that replace pallets and require a specialized push/pull forklift attachment to handle, saving storage and shipping space.
Question 3: What is the maximum allowable fork wear before a fork must be removed from service?
- 5% reduction in original thickness
- 10% reduction in original thickness (Correct answer)
- 15% reduction in original thickness
- 20% reduction in original thickness
Correct answer: 10% reduction in original thickness
ASME/ANSI standards specify that forks with a 10% or more reduction in original thickness at the critical cross-section must be removed from service.
Question 4: When stacking loads in a warehouse, how should heavier loads be positioned relative to lighter loads?
- Heavy loads on top to prevent light loads from shifting
- Heavy loads on the bottom, lighter loads on top (Correct answer)
- Alternate heavy and light loads throughout the stack
- Weight distribution does not matter when loads are stable
Correct answer: Heavy loads on the bottom, lighter loads on top
Placing heavier loads at the bottom lowers the center of gravity of the stack, making it more stable and preventing toppling.
Question 5: What is the function of a 'load backrest extension' on a forklift?
- It provides a seat backrest for operator comfort
- It prevents loads from falling backward onto the operator when elevated (Correct answer)
- It increases the fork's carrying capacity
- It acts as an attachment point for special equipment
Correct answer: It prevents loads from falling backward onto the operator when elevated
The load backrest extension (LBR) creates a vertical barrier behind the forks to stop loads from sliding back and striking the operator or mast.
Question 6: Which condition would MOST increase the risk of a forklift tip-over when traveling with a load?
- Traveling with the mast tilted fully back
- Turning sharply at speed on a wet surface with a raised load (Correct answer)
- Keeping the load at the lowest safe travel position
- Traveling straight on a level concrete floor
Correct answer: Turning sharply at speed on a wet surface with a raised load
Sharp turns at speed with a raised load on a slippery surface dramatically shifts the center of gravity outside the stability triangle, causing tip-over.
Question 7: What type of pallet construction is indicated by a pallet that has deck boards on both the top and bottom surfaces?
- Single-face pallet
- Double-face pallet (Correct answer)
- Single-wing pallet
- Block pallet
Correct answer: Double-face pallet
A double-face pallet has deck boards on both the top (load-bearing) and bottom (floor contact) surfaces, making it reversible and more durable.
NSC Materials & Equipment Knowledge 3
Which type of forklift is most suitable for use in a cold storage freezer environment?