Master Unlimited Tonnage Rivers, Revision & Practice Exams

Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level?

1. Hail ✓
2. Rime
3. Sleet
4. Freezing rain

You are at sea and have received a General Emergency message announcing the outbreak of war in Europe. You are directed to comply with the instructions in NGA (NIMA) PUB 117, Chapter Eight. Which statement is TRUE?

1. You should only enter a port in the danger zone during hours of darkness
2. You should attempt to coordinate with the Shipping Control Team ✓
3. When over 200 miles from a port in the danger zone, you should not darken ship
4. If on a coastwise voyage along the east coast of the U.S., you should put into the nearest port

Which of the following is the most accurate method of determining gyrocompass error while underway?

1. Comparing the gyro heading with the magnetic compass heading
2. Determining from the chart the course made good between celestial fixes
3. Comparing the gyro azimuth of a celestial body with the computed azimuth of the body ✓
4. It cannot be determined accurately at sea due to drift of unknown currents.

The scuppers had been plugged as required at the time a small oil spill occurs on deck from a leaking dresser coupler. After shutting down the transfer, the engine room should first be informed and then which action should be taken?

1. Rig a fire hose to wash down the deck
2. Spread an absorbent material, such as sawdust ✓
3. Remove the plugs from the scuppers
4. Sound the general alarm

If you are forced to abandon ship in a rescue boat, which action should you take?

1. Head for the nearest land
2. Head for the closest sea lanes
3. Vote on what to do, so all hands will have a part in the decision
4. Remain in the immediate vicinity ✓

Temperature and moisture characteristics are modified in a warm or cold air mass due to which factor?

1. Movement of the air mass ✓
2. Upper-level atmospheric changes
3. The heterogeneous nature of the air mass
4. Pressure changes in the air mass

What is the main advantage of a steady stream of water on a class "A" fire?

1. It breaks up and cools the fire ✓
2. It removes the oxygen
3. It washes the fire away
4. It protects the firefighting crew

When observing a rapid rise in barometric pressure, what may you expect?

1. Clearing weather, possibly accompanied by high winds ✓
2. Heavy rain or severe thundershowers
3. Clear weather with no wind, but the possibility of rain or snow within 24 hours
4. Deteriorating weather with rain or snow

What is a CORRECT reply to a pilot's request, "How's your head"?

1. "Checked"
2. "Eased to 10° rudder"
3. "Steady"
4. "Passing 50°" ✓

Your stability calculations indicate your vessel has a marginal GM. Which of the following is the most effective way to increase the stability of the vessel?

1. Raise the center of buoyancy and reduce freeboard
2. Lower the center of gravity and raise reserve buoyancy ✓
3. Raise the center of gravity and raise the center of buoyancy
4. Lower the center of buoyancy and raise the center of gravity

Which topmark shown in illustration D023NG below identifies an isolated danger?

1. A
2. B ✓
3. C
4. D

What monitoring device best indicates the load being carried by a diesel engine?

1. Lube oil pressure gauge
2. Exhaust pyrometer ✓
3. Tachometer
4. Jacket water temperature gauge

Which is the flammable limit range of Diesel Oil mixed with air?

1. 0% to 1% by volume
2. 0.8% to 5.3% by volume
3. 1.3% to 6.0% by volume ✓
4. 6.3% to 12.1% by volume

All lifeboats, rescue boats, and rigid-type liferafts shall be stripped, cleaned, and thoroughly overhauled at which time interval?

1. 6 months
2. Yearly ✓
3. 18 months
4. Every two years

Which topic is NOT required to be discussed at the pre-transfer conference?

1. Emergency shutdown procedures
2. Identity of the product to be transferred
3. Estimated time of finishing cargo ✓
4. Details of transferring and receiving systems

Which document is NOT required by law to be posted aboard a vessel?

1. Official Crew List ✓
2. Officer's licenses
3. Certificate of Inspection
4. Muster List

When shall an Operator of an Uninspected Passenger Vessel be required to produce his/her MMC?

1. Immediately, when requested by a USCG boarding officer ✓
2. Only when the vessel has at least 6 passengers for hire and requested by a USCG boarding officer
3. Only when the vessel is involved in a marine accident
4. An Operator of an Uninspected Passenger Vessel is not required to carry his/her MMC

A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. What should be your FIRST action?

1. Apply carbon dioxide to the fire
2. Secure the fuel supply ✓
3. Start the fire pump
4. Batten down the engine room

A shipper of cargo aboard your vessel offers a letter of indemnity for the cargo. This is done in order to obtain which document?

1. Clean Bill of Lading ✓
2. Straight Bill of Lading
3. Order Bill of Lading
4. Through Bill of Lading

In accordance with U.S. regulations which signal is required to be displayed during hours of darkness if a vessel is handling Class 1 explosive materials?

1. One all-round fixed red light ✓
2. Two all-round fixed red lights
3. One all-round flashing red light
4. No special signal is required during darkness

You are proceeding at a slow speed with your starboard side near the right bank of a channel. If your vessel suddenly sheers toward the opposite bank, which would be the BEST action to take?

1. Put engine full ahead, hard left rudder
2. Put engine full astern, hard left rudder
3. Put engine full ahead, hard right rudder ✓
4. Put engine full astern, hard right rudder

Your vessel is in Charleston, S.C. Which situation does NOT require you to clear Customs?

1. You took on no new cargo in Charleston, S.C. and are bound for a foreign port
2. All the cargo on board is of U.S. origin and destined for New York ✓
3. You did not discharge any cargo in Charleston and are bound for Panama
4. You did not load any cargo in Charleston and are bound for Halifax

In insurance terms, which describes the term Particular Average?

1. Charges against all parties in a marine venture to pay for damages incurred to the cargo
2. Losses claimed after all liens against the vessel are settled
3. The average distance steamed per day over the duration of the voyage charter party
4. The cargo loss sustained by only one party ✓

A clause in the charter party requires a vessel's owner to pay dispatch money when which of the conditions exists?

1. The vessel is not ready to load or discharge cargo
2. The vessel loads and discharges its cargo in less time than specified ✓
3. The vessel does not load and discharge its cargo in the time specified
4. The vessel changes berths to expedite loading or discharging

When should a fire be ventilated?

1. When using a steam smothering system
2. When using the fixed CO2 system
3. When attacking the fire directly ✓
4. All of the above

A carling is used aboard ship to accomplish which function?

1. To prevent the anchor from fouling when the brake is released
2. To stiffen areas under points of great stress between beams ✓
3. To provide an extra heavy fitting in a heavy lift cargo rig
4. To act as a connecting strap between the butted ends of plating

In the presence of external forces, the center of buoyancy of an inclined vessel is vertically aligned with which item?

1. The center of flotation
2. The keel
3. The center of gravity
4. The metacenter ✓

Line throwing apparatus aboard ship must contain which items?

1. Two rockets, one of which shall be the buoyant type
2. Three rockets, one of which shall be the buoyant type
3. Four rockets, two of which shall be the buoyant type ✓
4. Five rockets, two of which shall be the buoyant type

Which defines a bold reef?

1. A man-made reef extending above the water
2. A shallow reef
3. A steep and prominent sandbar ✓
4. A reef that is perpendicular to the current

Fog forms when which condition exists?

1. When the air is 50% water saturated
2. When the air temperature is equal to, or below the dew point temperature ✓
3. When the air is 90% water saturated
4. When the air temperature is greater than the dew point temperature

Steam fog will occur when which conditions exist?

1. Warm dry air from shore passes over cooler water
2. Extremely cold air from shore passes over warmer water ✓
3. Cool rain passes through a warm air mass
4. Cold ocean water evaporates into warm air

Which is TRUE on the Western Rivers when a vessel downbound with a following current is meeting an upbound vessel?

1. She has the right of way only if she is a power-driven vessel. ✓
2. She must wait for a whistle signal from the upbound vessel.
3. She has the right of way only if she has a tow.
4. She does not have the right of way, since the other vessel is not crossing the river.

Which describes a deadhead?

1. A tree or log awash in a nearly vertical position ✓
2. A crew member who refuses to work
3. A buoy that is adrift
4. The upstream end of a land wall

Which term is used to describe a structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current?

1. Crib
2. Dike ✓
3. Cutoff
4. Revetment