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competency Quiz on c13, created by mrk nthny on 06/08/2016.

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c13

Frage 1 von 87

1

Which is TRUE concerning immersion suits and their use?

Wähle eine der folgenden:

  • They provide sufficient flotation to do away with the necessity of wearing a life jacket.

  • A puncture in the suit will not appreciably reduce its value.

  • They should be tight fitting.

  • Only a light layer of clothing may be worn underneath.

Erklärung

Frage 2 von 87

1

You are underway when a fire breaks out in the forward part of your vessel. If possible, you should __________.

Wähle eine der folgenden:

  • put the vessel's stern into the wind

  • abandon ship to windward

  • call for assistance

  • keep going at half speed

Erklärung

Frage 3 von 87

1

The required number and type of hand portable fire extinguishers to be carried in the vicinity of the radio room exit for a tank vessel on an international voyage is one __________.

Wähle eine der folgenden:

  • C-II

  • B-I

  • B-II

  • C-I

Erklärung

Frage 4 von 87

1

Records of tests and inspections of a cargo vessel's fire extinguishing systems shall be kept on board __________.

Wähle eine der folgenden:

  • until the vessel's Certificate of Inspection expires

  • for 1 year

  • for 2 years

  • until the next Coast Guard inspection

Erklärung

Frage 5 von 87

1

In areas where CO2 piping is installed, such piping may not be used for any other purpose except __________.

Wähle eine der folgenden:

  • in connection with the fire-detecting system

  • in connection with the water sprinkler system

  • to ventilate the space

  • to run the emergency wiring to the space

Erklärung

Frage 6 von 87

1

What is the use of a flame screen ?

Wähle eine der folgenden:

  • It permits the passage of vapor but not of flame.

  • It prevents the passage of flammable vapors.

  • It prevents inert gas from leaving a tank.

  • It permits vapors to exit but not enter a tank.

Erklärung

Frage 7 von 87

1

You notice oil on the water near your vessel while taking on fuel. You should first __________.

Wähle eine der folgenden:

  • stop fueling

  • notify the senior deck officer

  • notify the terminal superintendent

  • determine whether your vessel is the source

Erklärung

Frage 8 von 87

1

The galley on your cargo vessel has an area of 232 square meters. What would fulfill the minimum requirements for fire protection?

Wähle eine der folgenden:

  • One B-II extinguisher

  • One B-I extinguisher

  • One B-II and one C-II extinguisher

  • One B-V extinguisher

Erklärung

Frage 9 von 87

1

You are fighting a fire in a watertight compartment using hoses and seawater. Stability may be reduced because of_______.

Wähle eine der folgenden:

  • increase in free surface which reduces the metacentric height

  • progressive downflooding

  • reduction of water in the storage tanks

  • reduction of KG to the minimum allowable

Erklärung

Frage 10 von 87

1

A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots. You should __________.

Wähle eine der folgenden:

  • change course and put the stern to the wind

  • remain on course and hold speed

  • change course to put the wind on either beam and increase speed

  • remain on course but slack the speed

Erklärung

Frage 11 von 87

1

When two fire hose teams are attacking a fire they should __________.

Wähle eine der folgenden:

  • not attack the fire from opposite sides

  • use different fire hose pressures

  • use fire hoses of different sizes

  • not wear protective clothing

Erklärung

Frage 12 von 87

1

How can you indicate that your vessel is in distress?

Wähle eine der folgenden:

  • Continuously sounding the fog horn

  • Displaying a large red flag

  • Displaying three black balls in a vertical line

  • Sounding four short blast and after two seconds sounding three more rapid blasts on the whistle

Erklärung

Frage 13 von 87

1

The object of plugging holes below the waterline on a MODU should be to _________.

Wähle eine der folgenden:

  • reduce the entry of water as much as possible

  • eliminate all water entering through the hole

  • only plug holes in machinery or other vital spaces

  • plug the largest holes first

Erklärung

Frage 14 von 87

1

When more than six short blasts and one long blast of the ship's whistle, accompanied by the same signal on the general alarm bell is sounded, What is the signal for?

Wähle eine der folgenden:

  • Abandonship/Boat Station

  • Fire and Emergency

  • Boat recall

  • Man overboard

Erklärung

Frage 15 von 87

1

Repairing damage to the hull of a MODU at, or above the waterline, reduces the threat of __________.

Wähle eine der folgenden:

  • continued progressive flooding

  • free surface effects

  • capsizing the MODU

  • wind overturning moments

Erklärung

Frage 16 von 87

1

After being launched, what does a totally enclosed survival craft which has been afloat over a long period of time require?

Wähle eine der folgenden:

  • Regular checks of bilge levels

  • Frequent opening of hatches to permit entry of fresh air

  • Use of ear plugs to dampen engine noise

  • Frequent flushing of the water spray system with freshwater

Erklärung

Frage 17 von 87

1

Which visual distress signal is acceptable for daylight use only?

Wähle eine der folgenden:

  • Orange smoke signal

  • Handled red line

  • Self-contained rocket propelled red parachute flare

  • Red aerial pyrotechnic flare

Erklärung

Frage 18 von 87

1

What is the use of EPIRB during abandon ship ?

Wähle eine der folgenden:

  • send radio homing signals to searching aircraft

  • hold the lifeboat's head up into the seas

  • generate orange smoke

  • seal leaks in rubber rafts

Erklärung

Frage 19 von 87

1

"A hole in the hull above the waterline may be temporarily patched with _________. I. pillows
II. blankets
III. Mattresses"

Wähle eine der folgenden:

  • I, II and III

  • I only

  • II only

  • III only

Erklärung

Frage 20 von 87

1

What is the purpose of wire stretched between the lifeboat davit heads?

Wähle eine der folgenden:

  • To support the manropes

  • Keep the movement of the davits at the same speed

  • Keep the davits from slipping when they are in the stowed position

  • Prevent vibration during lowering of the boat

Erklärung

Frage 21 von 87

1

How does the hand brake of a lifeboat winch being applied?

Wähle eine der folgenden:

  • By dropping the counterweighted lever

  • Manually disengaged when hoisting a boat

  • Controlled by the centrifugal brake mechanism

  • automatically engaged if lowering speed is excessive

Erklärung

Frage 22 von 87

1

The person-in-charge shall insure that each rescue boat on a OSV is lowered to the water, launched, and operated at least once every _____________.

Wähle eine der folgenden:

  • three months

  • month

  • two months

  • six months

Erklärung

Frage 23 von 87

1

Which of the following represents the emergency signal for a fire aboard ship?

Wähle eine der folgenden:

  • Continuous blast of the ship’s whistle for a period of not less than 10 seconds, supplemented by the same signal on the general alarm.

  • More than six short blasts and one long blast on the whistle

  • Three short blast of the whistle supplemented by the same signal on the general alarm.

  • More than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm.

Erklärung

Frage 24 von 87

1

Where would you find the FCC authorization for transmitting on your rig's EPIRB?

Wähle eine der folgenden:

  • On the Ship Station License.

  • On the side of the EPIRB transmitter.

  • In the radio log.

  • On the Certificate of Inspection.

Erklärung

Frage 25 von 87

1

All of the following are recognized distress signals under the Rules of the Road except__________.

Wähle eine der folgenden:

  • a green star signal

  • orange-colored smoke

  • red flares

  • the repeated raising and lowering of outstretched arms

Erklärung

Frage 26 von 87

1

Class "B" EPIRB's transmit on frequencies that are monitored by ________.

Wähle eine der folgenden:

  • private, commercial, and military aircraft

  • orbiting satellites in space

  • commercial radio stations

  • commercial fishing vessels

Erklärung

Frage 27 von 87

1

What is an approve signaling device required on inflatable liferafts from among the choices?

Wähle eine der folgenden:

  • Orange smoke signal

  • Pistol

  • Air horn

  • Lantern

Erklärung

Frage 28 von 87

1

When you are firing a pyrotechnic distress signal, it should be aimed__________.

Wähle eine der folgenden:

  • at about 60 degrees above the horizon

  • straight overhead

  • at the vessel whose attention you want to attract

  • into the wind

Erklärung

Frage 29 von 87

1

The master or person-in-charge of a MODU shall ensure that each deck from which lifeboats are launched is______________.

Wähle eine der folgenden:

  • kept clear of any obstructions that would interfere with launching

  • surfaced with a nonskid texture

  • roped off to prevent unnecessary access

  • posted with a list of persons assigned to the lifeboat

Erklärung

Frage 30 von 87

1

What must be accurately determined to assess the potential for progressive flooding after your vessel has been damaged?

Wähle eine der folgenden:

  • The integrity of the watertight boundaries.

  • The capacity of the water sprinkler system.

  • The operation of the machinery space bilge level alarms.

  • The strenght of the hull to withstand the progressive flooding

Erklärung

Frage 31 von 87

1

What is the important points to remember when operating davits?

Wähle eine der folgenden:

  • The davits should always be hand cranked the last 12 inches into the final stowed position

  • The gripes should be released after the boat is moving

  • The boats are generally lowered by surging the falls around cruciform bits

  • The tricing pendant should be tripped prior to releasing the gripes

Erklärung

Frage 32 von 87

1

You are in a survival craft boadcasting a distress message. What information would be essential to your rescuers?

Wähle eine der folgenden:

  • Your position by latitude and longitude.

  • The nature of the distress.

  • The time of day.

  • Your radio call sign.

Erklärung

Frage 33 von 87

1

Why are lifeboats usually double-ended?

Wähle eine der folgenden:

  • They are more seaworthy and less likely to be swamped or broach to.

  • They can go forward and backward more easily.

  • They require less space for stowing aboard ship.

  • Appearance and traditional styling.

Erklärung

Frage 34 von 87

1

When should distress flares and rockets be used?

Wähle eine der folgenden:

  • Only when there is a chance of them being sighted by rescue vessels.

  • They should be set off at half-hour intervals.

  • They should be set off at one-hour intervals.

  • Immediately upon abandoning the vessel.

Erklärung

Frage 35 von 87

1

Progressive flooding in the engine room may be minimized by securing watertight boundaries and what other measures?

Wähle eine der folgenden:

  • Pumping out flooded compartments

  • Transferring reserve feed water

  • Dumping fuel oil

  • Evacuating the engine room

Erklärung

Frage 36 von 87

1

What is the signal for lowering the ship’s lifeboats which is sounded on the ship’s whistle?

Wähle eine der folgenden:

  • One short blast

  • Two long blast

  • Three short blasts

  • One long blast

Erklärung

Frage 37 von 87

1

When you hear three short blasts on the ship’s whistle and the same signal on the general alarm bells, what does it signify?

Wähle eine der folgenden:

  • You are dismissed from the drill

  • You are required to go to your liferaft

  • You should point to the man overboard

  • You should start the fire pump

Erklärung

Frage 38 von 87

1

If doublebottom fuel tank levels are found to have increased after a ships grounding, you should suspect ______________.

Wähle eine der folgenden:

  • a puncture, crack, or hole in the skin of the vessel

  • a damaged pneumercator line

  • improper record keeping of fuel transfer activities

  • contamination of the contaminated steam supply system

Erklärung

Frage 39 von 87

1

A hole in the hull above the waterline may be temporarily patched with _________. I. pillows
II. blankets
III. Mattresses"

Wähle eine der folgenden:

  • I, II and III

  • I only

  • II only

  • III only

Erklärung

Frage 40 von 87

1

Progressive flooding in the engine room may be minimized by securing watertight boundaries and _______.

Wähle eine der folgenden:

  • pumping out flooded compartments

  • transferring reserve feed water

  • dumping fuel oil

  • evacuating the engine room

Erklärung

Frage 41 von 87

1

What must be accurately determined to assess the potential for progressive flooding after your vessel has been damaged?

Wähle eine der folgenden:

  • The integrity of the watertight boundaries.

  • The capacity of the water sprinkler system.

  • The operation of the machinery space bilge level alarms.

  • The strength of the hull to withstand the progressive flooding

Erklärung

Frage 42 von 87

1

Which of the following is used to signal crew members to report at boat stations or for boat drill?

Wähle eine der folgenden:

  • More than six short blasts followed by one long blast of the ships whistle.

  • A continuous blast of the ships whistle for a period of not less than 10 seconds.

  • One long blast followed by three short blasts of the ships whistle

  • Three short blasts of the ships whistle.

Erklärung

Frage 43 von 87

1

The fire alarm signal onboard United States flag merchant vessels is a continuous blast of the whistle for a period of not less than 10 seconds, supplemented by the continuous ringing of the general alarm bells for not less than 10 seconds. Where can this information be readily found aboard ship?

Wähle eine der folgenden:

  • SOLAS Safety

  • Certificate of Inspection Station bill

  • Construction Certificate

  • Fire Alarm Zone Chart

Erklärung

Frage 44 von 87

1

When more than six short blasts and one long blast of the ship's whistle, accompanied by the same signal on the general alarm bell is sounded, the signal is for_______.

Wähle eine der folgenden:

  • boat stations(abandon ship)

  • fire and emergency

  • boat recall

  • man overboard

Erklärung

Frage 45 von 87

1

The signal for lowering the ship’s lifeboats is sounded on the ship’s whistle as _________.

Wähle eine der folgenden:

  • one short blast

  • two long blast

  • three short blasts

  • one long blast

Erklärung

Frage 46 von 87

1

The traditional signal to commence lowering lifeboats and liferafts is__________.

Wähle eine der folgenden:

  • 1 short blast of the ships whistle

  • 3 short blast of the ships whistle

  • 3 long blast of the ships whistle

  • 1 long blast of the ships whistle

Erklärung

Frage 47 von 87

1

Which of the following represents the emergency signal for a fire aboard ship?

Wähle eine der folgenden:

  • Continuous blast of the ship’s whistle for a period of not less than 10 seconds, supplemented by the same signal on the general alarm.

  • More than six short blasts and one long blast on the whistle

  • Three short blast of the whistle supplemented by the same signal on the general alarm.

  • More than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm.

Erklärung

Frage 48 von 87

1

When you hear three short blasts on the ship’s whistle and the same signal on the general alarm bells, you___________.

Wähle eine der folgenden:

  • are dismissed from the drill

  • are required to go to your liferaft

  • should point to the man overboard

  • should start the fire pump

Erklärung

Frage 49 von 87

1

Repairing damage to the hull of a MODU at, or above the waterline, reduces the threat of __________.

Wähle eine der folgenden:

  • continued progressive flooding

  • free surface effects

  • capsizing the MODU

  • wind overturning moments

Erklärung

Frage 50 von 87

1

The order of importance in addressing damage control on a MODU is _________.

Wähle eine der folgenden:

  • control fire, control flooding, repair structural damage

  • control flooding, control fire, repair structural damage

  • restored vital services, control fire, control flooding

  • control fire, restore vital services, control flooding

Erklärung

Frage 51 von 87

1

When patching holes in the hull of a MODU, pillows, bedding and other soft materials can be used as _____________.

Wähle eine der folgenden:

  • gaskets

  • caulking

  • strongbacks

  • wedges

Erklärung

Frage 52 von 87

1

The object of plugging holes below the waterline on a MODU should be to _________.

Wähle eine der folgenden:

  • reduce the entry of water as much as possible

  • eliminate all water entering through the hole

  • only plug holes in machinery or other vital spaces

  • plug the largest holes first

Erklärung

Frage 53 von 87

1

When you are firing a pyrotechnic distress signal, it should be aimed__________.

Wähle eine der folgenden:

  • at about 60 degrees above the horizon

  • straight overhead

  • at the vessel whose attention you want to attract

  • into the wind

Erklärung

Frage 54 von 87

1

When should distress flares and rockets be used?

Wähle eine der folgenden:

  • Only when there is a chance of them being sighted by rescue vessels.

  • They should be set off at half-hour intervals.

  • They should be set off at one-hour intervals.

  • Immediately upon abandoning the vessel.

Erklärung

Frage 55 von 87

1

An approve signaling device required on inflatable liferafts include include a(n)__________.

Wähle eine der folgenden:

  • orange smoke signal

  • pistol

  • air horn

  • lantern

Erklärung

Frage 56 von 87

1

Signaling devices required on inflatable liferafts include_____________.

Wähle eine der folgenden:

  • red flares

  • a rocket shoulder rifle

  • an oil lantern

  • an air horn

Erklärung

Frage 57 von 87

1

Signaling devices required on inflatble life rafts include a(n) _____________.

Wähle eine der folgenden:

  • orange smoke signal

  • pistol

  • air horn

  • lantern

Erklärung

Frage 58 von 87

1

All of the following are recognized distress signals under the Rules of the Road EXCEPT__________.

Wähle eine der folgenden:

  • a green star signal

  • orange-colored smoke

  • red flares

  • the repeated raising and lowering of outstretched arms

Erklärung

Frage 59 von 87

1

A man aboard a vessel, signaling by raising and lowering his outstretched arms to each side, is indicating __________.

Wähle eine der folgenden:

  • a distress signal

  • danger, stay away

  • all is clear, it is safe to pass

  • all is clear, it is safe to approach

Erklärung

Frage 60 von 87

1

When a vessel signals her distress by means of a gun or other explosive signal, the firing should be at intervals of approximately _____________.

Wähle eine der folgenden:

  • 1 minute

  • 3 minute

  • 10 minutes

  • 1 hour

Erklärung

Frage 61 von 87

1

You can indicate that your vessel is in distress by____________.

Wähle eine der folgenden:

  • continuously sounding the fog horn

  • displaying a large red flag

  • displaying three black balls in a vertical line

  • sounding four short blast and after two seconds sounding three more rapid blasts on the whistle

Erklärung

Frage 62 von 87

1

Which visual distress signal is acceptable for daylight use only?

Wähle eine der folgenden:

  • Orange smoke signal

  • Handled red line

  • Self-contained rocket propelled red parachute flare

  • Red aerial pyrotechnic flare

Erklärung

Frage 63 von 87

1

What is the maximum length of time that distress flares are approved for?

Wähle eine der folgenden:

  • 3 and ½ years

  • 2 years

  • 5 years

  • 1 and ½ years

Erklärung

Frage 64 von 87

1

By regulation, orange smoke distress signals will expire not more than how many months from the date of manufacture?

Wähle eine der folgenden:

  • 42 months

  • 24 months

  • 36 months

  • 54 months

Erklärung

Frage 65 von 87

1

Each distress signal and self-activated smoke signal must be replaced not later than the marked date of manufacture?

Wähle eine der folgenden:

  • 36

  • 12

  • 24

  • 42

Erklärung

Frage 66 von 87

1

Class "B" EPIRB's transmit on frequencies that are monitored by ________.

Wähle eine der folgenden:

  • private, commercial, and military aircraft

  • orbiting satellites in space

  • commercial radio stations

  • commercial fishing vessels

Erklärung

Frage 67 von 87

1

Where would you find the FCC authorization for transmitting on your rig's EPIRB?

Wähle eine der folgenden:

  • On the Ship Station License.

  • On the side of the EPIRB transmitter.

  • In the radio log.

  • On the Certificate of Inspection.

Erklärung

Frage 68 von 87

1

When should the emergency position-indicating radio beacon(EPIRB) be activated after abandoning?

Wähle eine der folgenden:

  • Immediately

  • After one hour

  • Only when another vessel is in sight

  • Only after sunset

Erklärung

Frage 69 von 87

1

What should you do with your emergency position indicating radio beacon if you are in a liferaft during storm conditions?

Wähle eine der folgenden:

  • Bring it inside the liferaft and leave it on.

  • Bring it inside the liferaft and turn it off until the storm passes.

  • Leave it outside the liferaft and leave it on.

  • Leave it outside the liferaft but turn it off.

Erklärung

Frage 70 von 87

1

You are in a survival craft boadcasting a distress message. What information would be essential to your rescuers?

Wähle eine der folgenden:

  • Your position by latitude and longitude.

  • The nature of the distress.

  • The time of day.

  • Your radio call sign.

Erklärung

Frage 71 von 87

1

Which of the items in the lifeboat equipment listed would be the most suitable for night signaling to a ship on the horizon?

Wähle eine der folgenden:

  • A red parachute flare

  • A red handheld flare

  • A flashlight

  • A lantern

Erklärung

Frage 72 von 87

1

If you have to abandon ship, the EPIRB can be used to ____________.

Wähle eine der folgenden:

  • send radio homing signals to searching aircraft

  • hold the lifeboat's head up into the seas

  • generate orange smoke

  • seal leaks in rubber rafts

Erklärung

Frage 73 von 87

1

When operating gravity davits, ________________.

Wähle eine der folgenden:

  • the davits should always be hand cranked the last 12 inches into the final stowed position

  • the gripes should be released after the boat is moving

  • the boats are generally lowered by surging the falls around cruciform bits

  • the tricing pendant should be tripped prior to releasing the gripes

Erklärung

Frage 74 von 87

1

The hand brake of a lifeboat winch is _____________.

Wähle eine der folgenden:

  • applied by dropping the counterweighted lever

  • manually disengaged when hoisting a boat

  • controlled by the centrifugal brake mechanism

  • automatically engaged if lowering speed is excessive

Erklärung

Frage 75 von 87

1

It is important to test lifeboat davit limit switches on a regular basis to prevent ________.

Wähle eine der folgenden:

  • the possibility of the davit wires parting when the lifeboat is being retrieved and stowed in its davit

  • damage to the winch motor

  • damage to the releasing gear

  • the lifeboat from being lowered at an unsafe speed

Erklärung

Frage 76 von 87

1

The purpose of the wire stretched between the lifeboat davit heads is to ____________.

Wähle eine der folgenden:

  • support the manropes

  • keep the movement of the davits at the same speed

  • keep the davits from slipping when they are in the stowed position

  • prevent vibration during lowering of the boat

Erklärung

Frage 77 von 87

1

On a vessel with lifeboats on both side, the No.2 lifeboat would be located ________.

Wähle eine der folgenden:

  • forward of lifeboat No. 4 on the port side

  • forward of lifeboat No. 4 on the starboard side

  • aft of lifeboat No. 1 on the starboard side

  • aft of lifeboat No. 5 on the starboard side

Erklärung

Frage 78 von 87

1

The person-in-charge shall insure that each rescue boat on a OSV is lowered to the water, launched, and operated at least once every _____________.

Wähle eine der folgenden:

  • three months

  • month

  • two months

  • six months

Erklärung

Frage 79 von 87

1

The master or person-in-charge of a MODU shall insure that each deck from which lifeboats are launched is ______________.

Wähle eine der folgenden:

  • kept clear of any obstructions that would interfere with launching

  • surfaced with a nonskid texture

  • roped off to prevent unnecessary access

  • posted with a list of persons assigned to the lifeboat

Erklärung

Frage 80 von 87

1

A self-righting survival craft will return to an upright position provided that all personnel ____________.

Wähle eine der folgenden:

  • are seated with seatbelts on and doors shut

  • are seated with seatbelts on and doors open

  • are to shift to one side to right it

  • escape from the craft

Erklärung

Frage 81 von 87

1

The No. 3 lifeboat would be _____________.

Wähle eine der folgenden:

  • aft of boat No.1 on the starboard side

  • next to boat No. 2 on the starboard side

  • aft of boat No.1 on the port side

  • aft of boat No. 2 on the port side

Erklärung

Frage 82 von 87

1

The No. 1 lifeboat on a ship would be found ___________.

Wähle eine der folgenden:

  • on the starboard side

  • on the port side

  • aft of the forward lifeboat on the port side

  • aft of the forward lifeboat on the starboard side

Erklärung

Frage 83 von 87

1

The No. 2 lifeboat on a vessel would be found ___________.

Wähle eine der folgenden:

  • on the port side

  • aft of No.1 lifeboat port side

  • aft of No. 1 lifeboat starboard side

  • on the starboard side

Erklärung

Frage 84 von 87

1

Prior to lowering the lifeboat, the most important item to check is the __________.

Wähle eine der folgenden:

  • boat plug

  • cars

  • sail

  • life preservers

Erklärung

Frage 85 von 87

1

After being launched, a totally enclosed survival craft which has been afloat over a long period of time requires ___________.

Wähle eine der folgenden:

  • regular checks of bilge levels

  • frequent opening of hatches to permit entry of fresh air

  • use of ear plugs to dampen engine noise

  • frequent flushing of the water spray system with freshwater

Erklärung

Frage 86 von 87

1

Why are lifeboats usually double-ended?

Wähle eine der folgenden:

  • They are more seaworthy and less likely to be swamped or broach to.

  • They can go forward and backward more easily.

  • They require less space for stowing aboard ship.

  • Appearance and traditional styling.

Erklärung

Frage 87 von 87

1

For each passenger vessel, the minimum number of immersion suits to be carried for each lifeboat is at least ____________.

Wähle eine der folgenden:

  • 3

  • 1

  • 2

  • 4

Erklärung