BAPO ALREADY PASSED
For which tank application is the sounding tube entry point most likely to be on the MAIN DECK? - =Fuel
oil storage tank
What is the most likely location for the sounding tube entry point for an UNDIVIDED SEA WATER
BALLAST TANK? - =On the main deck above the associated cargo hold positioned fairly close to the
center line of the vessel
What is the most likely location for the sounding tube entry point for an ENGINE ROOM BILGE WATER
TANK? - =At the tank top in the lower level of the ENGINE ROOM positioned fairly close to the centerline
of the vessel
Assuming that all the following tanks have sounding tube entry points at the tank top, which tank would
most likely be sounded in the lower level of the ENGINE of a slow speed motor ship? - =Main ENGINE
lube oil SUMP tank
What is the mostly likely location for the sounding tube entry point for fuel oil storage WING tanks? -
=On the main deck above the associated WING tank outboard the cargo hatch covers
When lowering a sounding tape down a sounding tube, what should be done when the CUPPING or
SPLASHING sound is heard? - =The sounding tape should be payed out more slowly until a metallic
sound is heard
When loading a sounding tape down a sounding tube, what should be done when a METALLIC sound is
heard? - =The sounding tape should be stopped and then reeled back in
If it becomes difficult to read a sounding tape, what may be done to facilitate reading? - =Applying an
approved chalk or paste to the sounding tape
Using standard U.S units, how is a sounding tape typically marked? - =Linear feet and inches
What is the generic procedural sequence for sounding a tank with a pneumercator requiring manual
purging - =First purge with air, then allow the mercury to settle, and then fake the reading. Repeat the
,two entire process until two identical consecutive readings are obtained. This will be an accurate
reading
If a vented tank is being PUMPED OUT with a rotary pump and the tank vent flame screen becomes
clogged, what will happen to the pumping flow rate in gallons per minute and the pump suction
pressure respectively as compared to when the flame screen was unrestricted? - =The pumping flow
rate will DECREASE and the pump suction pressure will DECREASE (or the PUMP suction vacuum will
increase, as appropriate)
If a vented tank is being FILLED WITH a rotary pump and the tank vent flame screen becomes clogged,
what will happen to the pumping flow rate in gallons per minute and the pump discharge pressure
respectively as compared to when the flame screen was unrestricted? - =The pumping flow rate will
DECREASE and the pump discharge pressure will INCREASE
What type of TANK has it's boundaries protected from explosive or implosive forces with a
PRESSURE/VACUUM valve? - =CARGO tank
What type of TANK has it's boundaries protected from explosive or implosive forces with a GOOSENECK
valve? - =VENTED tank
What type of TANK has it's boundaries protected from explosive forces with a SAFETY OR RELIEF valve? -
=PRESSURE VESSEL
What is the proper procedure for OPENING a GATE valve? - =Rotate the stem fully COUNTER-
CLOCKWISE then rotate clockwise approximately 1/4 turn as viewed from the top of the valve
What is the proper procedure for CLOSING a GATE valve? - =CLOCKWISE as viewed from the top of the
valve
In addition to valve chattering, why is it considered poor engineering practice to throttle a GATE valve? -
=The valve will eventually tend to leak when closed due to GATE erosion
What circumstance would most likely cause a GATE or GLOBE valve to thermally JAM OPEN making it
difficult to close? - =Failure to rotate stem 1/4 turn in the closed direction AFTER fully OPENING.
, In what application would thermally JAMMING OPEN a GATE or GLOBE valve most likely occur? - =Steam
What is the proper procedure for OPENING a GLOBE valve? - =Rotate the stem fully COUNTER-
CLOCKWISE then rotate clockwise approximately 1/4 turn as viewed from the top of the valve if it is to
be opened fully. Otherwise, rotate COUNTER-CLOCKWISE to degree of throttling.
What circumstance would most likely cause a GATE or GLOBE valve to thermally JAM CLOSED making it
difficult to open? - =Failure to "ease up" on a steam stop isolation valve before cutting in steam
upstream of the valve.
What is the proper procedure for CLOSING a GLOBE valve? - =Rotate the stem fully CLOCKWISE and
viewed from the top of the valve.
In what application would several repeated closings be required to prevent seepage through the valve,
when a line is taken out of service by the valve closure? - =Steam
What type of MANUALLY operated valve would most likely be used for a BLOW DOWN service? - ="Y"
GLOBE valve
What MANUALLY operated valve can be used for THROTTLING but requires a LOCKING DEVICE to
prevent valve position drift? - =Butterfly valve
What MANUALLY operated valve is IDEALLY SUITED for THROTTLING? - =GLOBE valve
What is the proper procedure for OPENING a lever operated BALL valve? - =Rotate the lever 90 degrees
FROM the perpendicular to the pipe line TO PARALLEL to the pipeline (from stop to stop)
What is the proper procedure for CLOSING a lever operated BALL VALVE? - =Rotate the lever 90 degrees
FROM parallel to the pipeline TO PERPENDICULAR to the pipeline (from stop to stop)
With what type of GATE VALVE would it be EASIEST to determine the valve position from a
CONSIDERABLE DISTANCE? - =RISING STEM GATE valve
For which tank application is the sounding tube entry point most likely to be on the MAIN DECK? - =Fuel
oil storage tank
What is the most likely location for the sounding tube entry point for an UNDIVIDED SEA WATER
BALLAST TANK? - =On the main deck above the associated cargo hold positioned fairly close to the
center line of the vessel
What is the most likely location for the sounding tube entry point for an ENGINE ROOM BILGE WATER
TANK? - =At the tank top in the lower level of the ENGINE ROOM positioned fairly close to the centerline
of the vessel
Assuming that all the following tanks have sounding tube entry points at the tank top, which tank would
most likely be sounded in the lower level of the ENGINE of a slow speed motor ship? - =Main ENGINE
lube oil SUMP tank
What is the mostly likely location for the sounding tube entry point for fuel oil storage WING tanks? -
=On the main deck above the associated WING tank outboard the cargo hatch covers
When lowering a sounding tape down a sounding tube, what should be done when the CUPPING or
SPLASHING sound is heard? - =The sounding tape should be payed out more slowly until a metallic
sound is heard
When loading a sounding tape down a sounding tube, what should be done when a METALLIC sound is
heard? - =The sounding tape should be stopped and then reeled back in
If it becomes difficult to read a sounding tape, what may be done to facilitate reading? - =Applying an
approved chalk or paste to the sounding tape
Using standard U.S units, how is a sounding tape typically marked? - =Linear feet and inches
What is the generic procedural sequence for sounding a tank with a pneumercator requiring manual
purging - =First purge with air, then allow the mercury to settle, and then fake the reading. Repeat the
,two entire process until two identical consecutive readings are obtained. This will be an accurate
reading
If a vented tank is being PUMPED OUT with a rotary pump and the tank vent flame screen becomes
clogged, what will happen to the pumping flow rate in gallons per minute and the pump suction
pressure respectively as compared to when the flame screen was unrestricted? - =The pumping flow
rate will DECREASE and the pump suction pressure will DECREASE (or the PUMP suction vacuum will
increase, as appropriate)
If a vented tank is being FILLED WITH a rotary pump and the tank vent flame screen becomes clogged,
what will happen to the pumping flow rate in gallons per minute and the pump discharge pressure
respectively as compared to when the flame screen was unrestricted? - =The pumping flow rate will
DECREASE and the pump discharge pressure will INCREASE
What type of TANK has it's boundaries protected from explosive or implosive forces with a
PRESSURE/VACUUM valve? - =CARGO tank
What type of TANK has it's boundaries protected from explosive or implosive forces with a GOOSENECK
valve? - =VENTED tank
What type of TANK has it's boundaries protected from explosive forces with a SAFETY OR RELIEF valve? -
=PRESSURE VESSEL
What is the proper procedure for OPENING a GATE valve? - =Rotate the stem fully COUNTER-
CLOCKWISE then rotate clockwise approximately 1/4 turn as viewed from the top of the valve
What is the proper procedure for CLOSING a GATE valve? - =CLOCKWISE as viewed from the top of the
valve
In addition to valve chattering, why is it considered poor engineering practice to throttle a GATE valve? -
=The valve will eventually tend to leak when closed due to GATE erosion
What circumstance would most likely cause a GATE or GLOBE valve to thermally JAM OPEN making it
difficult to close? - =Failure to rotate stem 1/4 turn in the closed direction AFTER fully OPENING.
, In what application would thermally JAMMING OPEN a GATE or GLOBE valve most likely occur? - =Steam
What is the proper procedure for OPENING a GLOBE valve? - =Rotate the stem fully COUNTER-
CLOCKWISE then rotate clockwise approximately 1/4 turn as viewed from the top of the valve if it is to
be opened fully. Otherwise, rotate COUNTER-CLOCKWISE to degree of throttling.
What circumstance would most likely cause a GATE or GLOBE valve to thermally JAM CLOSED making it
difficult to open? - =Failure to "ease up" on a steam stop isolation valve before cutting in steam
upstream of the valve.
What is the proper procedure for CLOSING a GLOBE valve? - =Rotate the stem fully CLOCKWISE and
viewed from the top of the valve.
In what application would several repeated closings be required to prevent seepage through the valve,
when a line is taken out of service by the valve closure? - =Steam
What type of MANUALLY operated valve would most likely be used for a BLOW DOWN service? - ="Y"
GLOBE valve
What MANUALLY operated valve can be used for THROTTLING but requires a LOCKING DEVICE to
prevent valve position drift? - =Butterfly valve
What MANUALLY operated valve is IDEALLY SUITED for THROTTLING? - =GLOBE valve
What is the proper procedure for OPENING a lever operated BALL valve? - =Rotate the lever 90 degrees
FROM the perpendicular to the pipe line TO PARALLEL to the pipeline (from stop to stop)
What is the proper procedure for CLOSING a lever operated BALL VALVE? - =Rotate the lever 90 degrees
FROM parallel to the pipeline TO PERPENDICULAR to the pipeline (from stop to stop)
With what type of GATE VALVE would it be EASIEST to determine the valve position from a
CONSIDERABLE DISTANCE? - =RISING STEM GATE valve
