FW Generators Quiz

Question 1

Diesel engine jacket water is used in the fresh water distillation process as the __________.

Answer 1

means of heating the feed water

Question 2

Scale formation in a flash-type evaporator is usually found in the __________.

Answer 2

tubes of the salt water feed heater

Question 3

The operation of the lube oil cooler, shown in the illustration as item #4, will be characterized by which of the following statements? Illustration MO-0111
A The temperature of the sea water entering the cooler will be higher when operating with the distiller on line.
B The pressure of the lube oil to the cooler will increase whenever the distiller is on line.
C The pressure of the sea water to the lube oil cooler will increase with the distiller on line.
D The temperature of the lube oil entering the cooler will decrease whenever the distiller is on line.

Answer 3

A The temperature of the sea water entering the cooler will be higher when operating with the distiller on line.

Question 4

The final heating of the feed water in a flash type distilling plant is carried out by __________.

Answer 4

low pressure steam admitted to the feed water heater

Question 5

Which of the following statements describes the approximate relation between the feed water entering the unit shown in the illustration and brine being removed? Illustration MO-0111
A The brine will be removed at a faster rate than feed water entering to prevent the possibility of flooding.
B Twenty-five percent of the feed water entering the device is removed as brine.
C Seventy-five percent of the feed water entering the unit is removed as brine.
D The amount of feed water entering the distiller is dependent upon the condition of device “7”, while the amount of brine leaving is dependent upon the condition of device “21”.

Answer 5

C Seventy-five percent of the feed water entering the unit is removed as brine.

Question 6

Excess brine accumulated in the distiller, shown in the illustration, is removed during normal operation by __________. Illustration MO-0111

Answer 6

the continuous action of ejector “22”

Question 7

Which of the following statements represents the two major functions provided by the item labeled “20” shown in the illustration? Illustration MO-0111
A The pump supplies the motive force to the ejectors and removes the excess distillate.
B The pump is used to drain the shell when the unit is secured, in addition to powering the ejectors.
C The pump provides for venting of associated equipment while also powering the ejectors.
D The pump supplies the motive fluid to the ejectors in addition to supplying the feed water to the distiller.

Answer 7

D The pump supplies the motive fluid to the ejectors in addition to supplying the feed water to the distiller.

Question 8

Which of the following statements concerning the systems shown in the illustration is correct? Illustration MO-0111
A The jacket water primarily loses its heat at the cooler and is further heated in the evaporator section.
B The feed water gains heat in section “23”, while the vapor gives up heat in section “24”.
C The jacket water absorbs heat in the evaporator section, while giving up its heat in the distiller section.
D The feed water acquires heat passing through devices “2”and “23”.

Answer 8

B The feed water gains heat in section “23”, while the vapor gives up heat in section “24”.

Question 9

Which of the conditions listed would indicate a large condenser tube leak within the distiller shown in the illustration? See Illustration MO-0111
A A slow continuous rise in the lube oil cooler outlet temperature indicated at device “4”.
B The activation of the salinity monitoring equipment’s annunciator circuit.
C A decrease in the level of the main engine expansion tank as indicated by a low level alarm.
D An increase in distiller output resulting from the combination of jacket water and the distillate produced.

Answer 9

B The activation of the salinity monitoring equipment’s annunciator circuit.

Question 10

If valve “H” shown in the illustration is opened wide while the distiller is in operation, __________. Illustration MO-0111

Answer 10

the absolute pressure of the unit will increase with an associated increase in shell temperature

Question 11

What would happen if valve “25” shown in the illustration, vibrated open with the unit in operation? Illustration MO-0111

Answer 11

The absolute pressure of the unit would increase, causing a decrease in distillate output.

Question 12

If valve “D” is opened during the normal operation of the distiller shown in the illustration, which of the events listed will occur? Illustration MO-0111

Answer 12

The amount of vapor being formed in the evaporator will decrease.

Question 13

In a flash-type evaporator, an electrical salinity cell would be installed in the __________.
A distillate outlet from the distillate cooler
B distillate inlet to the distillate cooler
C condensate drains from the distiller feed water heater
D all of the above

Answer 13

D all of the above

Question 14

What is the function of the item “7” shown in the illustration? Illustration MO-0111

Answer 14

This jacket water pump circulates fresh water throughout the engine cooling and distiller heating systems.

Question 15

The operation of the lube oil cooler, shown in the illustration as item #4, will be characterized by which of the following statements? Illustration MO-0111
A The temperature of the sea water entering the cooler will be higher when operating with the distiller on line.
B The pressure of the lube oil to the cooler will increase whenever the distiller is on line.
C The pressure of the sea water to the lube oil cooler will increase with the distiller on line.
D The temperature of the lube oil entering the cooler will decrease whenever the distiller is on line.

Answer 15

A The temperature of the sea water entering the cooler will be higher when operating with the distiller on line.

Question 16

Which of the following statements represents the two major functions provided by the item labeled “20” shown in the illustration? Illustration MO-0111
A The pump supplies the motive force to the ejectors and removes the excess distillate.
B The pump is used to drain the shell when the unit is secured, in addition to powering the ejectors.
C The pump provides for venting of associated equipment while also powering the ejectors.
D The pump supplies the motive fluid to the ejectors in addition to supplying the feed water to the distiller.

Answer 16

D The pump supplies the motive fluid to the ejectors in addition to supplying the feed water to the distiller.

Question 17

The items labeled “21” and “22”, shown in the illustration are used to remove __________. Illustration MO-0111

Answer 17

non-condensable gases and brine

Question 18

Which of the following statements describes what will occur to the volume of water vapor as it is exposed to the lower temperatures existing in the device labeled “24” shown in the illustration? Illustration MO-0111
A The volume is increased as condensation occurs at the tube surfaces.
B The volume will increase if the valve labeled “J” is opened excessively, resulting in an increase of the distiller absolute pressure.
C The volume is greatly reduced, contributing to condensation within the condenser.
D The latent heat of condensation is removed causing the volume to increase.

Answer 18

C The volume is greatly reduced, contributing to condensation within the condenser.

Question 19

Which device is used to prevent over pressurization of the illustrated distiller? Illustration MO-0111

Answer 19

“26” (pressure relief valve)

Question 20

Where is the latent heat obtained to create vapor from the feed water in the illustrated distiller? Illustration MO-0111

Answer 20

From having passed through “23”.