Welcome to your MEO Class 4 - General Test 1
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1
[General]
Pump driven clutch type attached vacuum pumps are commonly used for priming ballast pumps and emergency fire pumps. What is the factor which clutches the vacuum pump clutch to the pump clutch during start of the pump?
2
[General]
Which of the following would be the correct way(s) of using a torque wrench?
3
MECHANICAL SEALS ARE NOT USED IN
4
The function of an accumulator on the discharge side of a reciprocating bilge pump is to:
5
Salinity of distilled water produced depends upon _
6
Pump Start but Motor get overloaded or Trip on overload.
7
After cleaning the sea chest filter you have placed the filter in the body and tightened the cover. Which one of the following is the best alternative?
8
Principle of fire fighting onboard is
9
Function of a de-superheater is to.
10
Why should combustion blowers left running for while after firing a boiler?
11
[General]
The water from discharge side of the centrifugal pump is supplied as sealing water to the stuffing box for the pump shaft at:
12
[General]
Correct method of greasing a centrifugal pump bearing is:
13
Refer cooling tubes act as self-cooling & expansion by
14
Which of the following valves cannot prevent backflow of liquid in a pipeline?
16
When securing a centrifugal distillate pump, which of the listed steps should be carried out FIRST?
17
After your overhaul a centrifugal pump is not rotating what may be the possible cause:
18
[General]
What type of tubes used in Air comp cooler?
19
Emergency steering testing
20
A ball valve was found leaking in service. Upon inspection it was found that the PTFE seat had worn out and was renewed. The valve stopped leaking in closed condition. How do think a ball valve provides perfect sealing?
21
Dezincification of brass can be prevented by introduction of additives like
22
The difference between the discharges of a centrifugal pump n reciprocating pump the discharge of centrifugal pump is ----------while that if reciprocating is ---------
23
[General]
It is given that engine room bilge pump has suction manifold on which 3 valves are located. One valve for the 3 engine room bilge wells suction, another one for Bilge tank suction and the third one is for sea water suction. It is found that the Bilge pump is unable to take suction from any of the bilge wells, but is able to take suction efficiently from Bilge tank. What is the most probable cause?
24
A ball valve is found leaking in service and needs to be overhauled. What type of repairs can be carried out?
25
Turbocharger most preferred
26
Which type of valve is not rotating type....
27
centrifugal pump will typically give you a low flow rate at a lower pressure, where a piston pump will give you more pressure and higher flow rate. Is the statement correct?
28
The most important control measure to prevent boiler tube failure is:
29
[General]
Increasing the rotational speed of a cargo pump the pump flow rate will:
30
If dew point increases what happens to wet bulb temp and dry bulb temp?
31
In which of the following types of refractory failure, softening of the refractory bricks takes place due to presence of sodium/vanadium in fuel?
32
F.O. transfer pump was working efficiently, but it stopped taking suction suddenly. There is a sounding of 6.0 m in the F.O. deep tank. The suction pressure gauge was renewed recently and is showing a positive pressure when pump is running, but Pump is not transferring any F.O. What is the most probable cause?
33
U R responsible for daily transfers of engine room bilges. U follow the sequences aft –fwd (P)-fwd(s) bilge well n u have never experienced a problem but 5/E started the transfer n first transferred forward (s) bilge well n without any problem n u join him later u find that bilge pump is not taking suction fr f(p) n aft bilge well n then u have checked everything is normal. What is the cause?
34
Purifier is not rotating with desired rpm, reason?
35
Change in volume in closed cooling system is achieved by
36
The main disadvantages of a reciprocating pump over a Gear pump is that:
37
Which of the following valve is liable to open or close under pressure of fluid, if not locked in position?
38
[General]
It has been reported that Engine room bilge pump was unable to take suction from Fwd. (P) bilge well while it taking suction efficiently from Fwd.(S) & aft bilge wells. What could be the most probable cause?
39
[General]
Chromium is a nobler metal when compared to that of steel. In some marine applications Chromium is electroplated to the steel surfaces. Why?
40
Which of the following is a correct point for sampling of system lube oil for on board or shore analysis?
41
The dew point is reached when the wet bulb temperature is
42
Which of the following used in boiler treatment is an oxygen scavenging
43
Pump driven clutch type attached vacuum pumps are commonly used for priming ballast pumps and emergency fire pump. What is the factor which de-clutches the vacuum pump from the pump clutch?
44
Copper tubing is used in refrigerant system because
45
You are pumping out sludge to a shore facility using your sludge pump. You find that the discharge rate of pump is very slow and suction filter is getting clogged frequently. What is the best alternative to counteract the problem?
47
As the amount of moisture in the air increases, the difference between the dry bulb and wet bulb temperatures will……
48
The gland packing of centrifugal pump should have
49
[General]
Centrifugal pumps cannot handle air and require priming. But you are aware that centrifugal which on the same principal can handle air very well. Which two properties of air are responsible because of which the centrifugal pumps cannot handle air:-
50
Rudder is locked at an angle & can be moved by manual change-
Do post class 2 and chief question /answers too.