Cargo Handling and Operations Flashcards
7 cards from real Tanker Familiarization practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Cargo Handling and Operations flashcards as text
What is the function of a 'crossover valve' in a tanker's cargo piping system?
Answer: To connect two otherwise separate pipeline systems or manifolds
Crossover valves connect separate cargo pipeline systems, providing operational flexibility to transfer between lines or allow one pump to serve multiple tanks or manifolds.
Which document must a tanker obtain from the terminal before commencing cargo operations?
Answer: Safety Data Sheet (SDS) for the cargo
Safety Data Sheets (formerly MSDS) must be obtained for all cargoes before operations begin, providing essential information on hazards, handling precautions, emergency response, and PPE requirements.
What does a 'ship/shore safety checklist' accomplish before cargo operations begin?
Answer: Ensures both vessel and terminal have verified all safety requirements and agreed on procedures
The ship/shore safety checklist is a systematic joint verification by both vessel and terminal personnel confirming all safety systems, communication, emergency arrangements, and operational parameters are in order.
What precaution should be taken when loading a cargo with a flash point below 60°C (140°F)?
Answer: Hot work permits must be suspended and ignition sources controlled throughout the vessel
Cargoes with flash points below 60°C are considered flammable; all hot work must cease, smoking must be prohibited, and all ignition sources must be controlled throughout the vessel during operations.
What is the purpose of conducting a 'line pressure test' before cargo operations?
Answer: To confirm the integrity of cargo pipelines and connections and detect leaks
Line pressure tests apply pressure to cargo piping systems before operations to identify any leaks, weak joints, or defective valves that could cause cargo spills or accidents during transfer.
During discharge, why is it important to monitor tank pressures and avoid excessive vacuum in cargo tanks?
Answer: Vacuum can cause structural damage to tank walls or collapse the tank
Cargo tanks are designed to withstand limited vacuum; excessive negative pressure can cause structural collapse or deformation of tank walls, which is why P/V valves and inert gas makeup are critical during discharge.
What is the primary reason for using a 'closed loading' procedure when loading volatile petroleum products?
Answer: To prevent vapor escape and reduce flammable atmosphere and pollution
Closed loading keeps the cargo system sealed during transfer, preventing flammable and potentially toxic vapors from escaping to atmosphere, reducing explosion risk and environmental pollution.