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1. Over which components does the Blending Unit Controller act in order to blend fuel of the required viscosity?
a. All of these
b. The steam inlet and return by-pass valves of the fuel heater
c. The diesel oil and heavy fuel oil booster pumps
d. The diesel oil and fuel oil inlet valves of the blender
2. Why are some boiler tubes not plain cylindrical?
a. to give a greater heating area
b. to facilitate gas flow
c. for extra strength
d. to reduce scale formation
3. if open circuit and interruption of current continuity occur in the windings of an electric motor it is called ....
a. an earth fault
b. a winding break
c. a short circuit
d. an insulation breakdown
4. you are experiencing major surging in the fresh water cooling system. What could be the reason?
a. You have a cracked liner or cover
b. the cooling water temperature is too low
c. the fresh water-circulating pump is malfunctioning
d. the expansion tank is empty
5. what is "simmer" on a safety valve?
a. a metallic hammering noise
b. a failure of a safety valve to re-seat
c. first leakage before the valve opens
d. a hissing sound indicating that a safety valve is leaking
6. during normal operation, the telescopic piping of this diesel engine's piston are sliding up and down into ...
a. compressed air vessels
b. telescopic buffer vessels
c. piston cooling water piping
d. the crankcase cooling space
7. on all ships it is possible to cool the propulsion machinery directly by the ...
a. main fire pump
b. after peak cooling water
c. ballast pump
d. main sea water pump
8. in a "shunt" DC motor how are the pole windings connected?
a. both parallel and in series
b. in series with the armature
c. in parallel with the armature
d. separately from the armature output
9. a breakdown in insulation between a motor winding and the motor frame is called ...
a. an insulation breakdown
b. an earth
c. a short circuit
d. a winding breakdown
10. boiler water chemical additives should be supplied to the boiler via ...
a. the chemical dosing line
b. the hotwell through the chemical dosing pump
c. the hotwell
d. something else
11. what is the result if a motor runs at a frequency higher than its designed operating frequency?
a. it will run slower and at too high voltage
b. it will run faster and be overloaded
c. it will run slower with too high current
d. it will run faster and overspeed
12. you are experiencing blow-by on the main engine but, due to operational circumstances, it is impossible to stop and carry out a piston overhaul. What is the correct action to take?
a. increase cylinder oil consumption
b. no action is necessary
c. reduce speed temporarily and increase cylinder oil supply
d. reduce speed and closely monitor exhaust temperature on the affected unit
13. why is stainless steel swarf particularly hazardous?
a. it has extremely sharp edges
b. it is very hot
c. breaks into chips that then fly off the work place
d. it is a continuous piece and can become caught up in the workplace
14. why is a by-pass fitted to the cooling water line of the charge air cooler?
a. to allow increased Jacket water flow to the water spaces
b. to prevent the air temperature going too high
c. to maintain the jacket water temperature
d. to prevent overcooling of the charge air
15. why does the fluid pass through the valve from beneath the valve lid?
a. there is less scouring of the valve seat at particular openings
b. the valve is easier to open
c. there is less restriction to flow in this direction
d. with the valve closed the delivery pressure is isolated from the gland
16. the monitoring system that tests the plant for readings of the temperature, pressure etc. is called:
a. the loop back system
b. the demand display unit
c. the comparing unit
d. the scanning unit
17. after how many hours would you consider changing the turbocharger bearings, even through all appears to be normal?
a. 4000 hours
b. 12000 hours
c. 30000 hours
d. 25000 hours
18. what would be rated to relieve excess refrigeration compressor pressure?
a. pressure relief valve to suction valve
b. bursting disc to compressor suction
c. bursting disc to condenser inlet
d. pressure relief valve to atmosphere
19. what happens to the terminal voltage of an alternator producing 440 Volt when it supplies a lagging power factor load, example induction motors?
a. the terminal voltage will be exactly 440 V
b. the terminal voltage goes above 440 V
c. the terminal voltage will drop below 440 V
d. the terminal voltage will fluctuate around 440 V
20. what should be the first action on discovering a main engine malfunctioning?
a. inform the C/E
b. slow the engine, check pressures and temperatures
c. stop the engine and attempt to rectify the fault
d. inform the Bridge watch keeper
21. on a set of crankshaft deflection readings, what would a reading of +4 signify?
a. the crankpin location is 4/100 mm out of centre
b. the main bearing on one side is 4/100 mm greater than the other
c. the crank webs have closed in by 4/100 mm
d. the crank webs have opened up by 4/100 mm
22. what would loss of vacuum indicate on a bilge pump?
23. what provides auto feed on a shaping machine?
24. if lub oil analysis results indicate fuel dilution what should be the first action?
a. take another set of samples and send off immediately
b. locate and rectify source of
c. renew the lub oil charge
d. operate the lub oil purifier
25. when boring on the centre lathe, what is most usual cause of chatter?
a. lack or rigidity afforded by the boring bar
b. incorrect feed rate
c. incorrect tool angles
d. incorrect cutting speed
26. how does a bolt differ from a Set Screw?
a. shorter in length
b. metric thread
c. threaded right up to the head
d. shorter plain portion
27. what determines the amount of fuel delivered by a Bosch type fuel pump?
a. the stroke length of the fuel pump
b. the fuel cam profile
c. the fuel pump plunger top clearance
d. the rotational position of the fuel pump plunger
28. what machine tool would be used for accurate machining of distance pieces?
a. centre lathe
b. vertical milling machine
c. shaping machine
d. surface grinding machine
29. in a series wound generator what is the connection between field and armature currents?
a. no connection
b. shunt connected
c. series connected
d. parallel connection
30. how are starting air valves made gas tight in the cylinder heads of diesel engines?
a. by face to face, hydraulic pressure applied
b. they are screwed into the cylinder head and asbestos sealed
c. Teflon or Viton seal rings are fitted
d. a copper gasket is fitted
31. what is the most obvious reason for drop in electrical load on a ballast pump?
a. malfunction of the pump
b. pump no longer pumping liquid
c. malfunction of the electrical motor
d. tank being transferred into is full
32. steam produced by a boiler whose temperature is above that corresponding to its pressure is referred to as:
a. dry steam
b. superheated steam
c. bled steam
d. regenerated steam
33. in a fuel oil service system where would the relief valves discharge?
a. Simplex fuel oil strainer
b. settling tanks
c. re-circulating line or pump suction
d. slop retention tanks
34. during overhaul what two piston ring dimensions are taken?
a. butt gap and radial depth
b. axial thickness and radial depth
c. butt gap and axial clearance
d. axial thickness and butt gap
35. what of the following components is NOT directly lubricated by the lubricating inlet supply line?
a. the crosshead bearing
b. the main bearings
c. the thrust bearing
d. the gear train
36. when turning a tapper on a centre lathe what could be adjusted?
a. tailstock
b. cross slide
c. headstock
d. lead screw
37. what do you think would be a reasonable scavenge air pressure for engine running at full speed?
a. 7,0 kg/cm2
b. 1,25 kg/cm2
c. 6,25 kg/cm2
d. 25 kg/cm2
38. what is the function of the main engine dirty oil tank?
a. collecting tank for dirty oil of main engine intended for purification
b. drain tank for the piston rod stuffing boxes
c. collecting tank from main engine scavenge drains
d. collecting tank for all non-reusable oils
39. when taking a set of diesel engine crankshaft deflections why are two readings taken BDC position?
a. the second is taken to check the accuracy of the first reading
b. during the rotating of the crankshaft the reading may vary
c. it is not possible to read the dial gauge accurately in one position
d. the position of con rod makes a single reading at BDC impossible
40. where and how would you take sample of the oil from the main engine sump tank?
a. from the suction filter drain of the ME lub oil pumps
b. in port when engine is stopped taken directly from the sump tank
c. at the sample cock on delivery side of the ME lub oil pump
d. after the purifier when running sump to sump and ME running
41. in extreme circumstances what is the allowable min & max voltage tolerance?
a. 85% - 120%
b. 75% - 125%
c. 70% - 130%
d. 90% - 110%
42. where is the filter/drier unit fitted in the refrigerant line?
a. on the compressor discharge line
b. between condenser and expansion valve
c. between expansion valve and evaporator
d. at the evaporator inlet
43. what is always fitted in instrument air supply line?
a. a drain valve
b. a moisture separator
c. an automatic drain valve
d. an oil separator
44. in a naturally aspirated 4 cycle engine the exhaust valve is open for a period of:
a. 200 degrees
b. 180 degrees
c. 250 degrees
d. 160 degrees
45. if on inspection, anodes are unworn what could be the reason?
a. no electrical contact between anode and cooler body
b. coolant flow too high
c. cooler chocked
d. incorrect anodes fitted
46. if jacked water alkalinity keeps dropping what could be the cause?
a. possible cracked liner/head or leaking head joint
b. jacket water temperature is too high
c. circulating pump not providing sufficient flow
d. more chemical additive required
47. on which unit of scavenge air system is an automatic drain fitted?
a. on the scavenge air blower
b. on the scavenge air manifold
c. on the exhaust gas boiler
d. on the turbo blower