Q.1 What safety precautions you will observe while using hand tools.

• Must wear proper PPE – Safety Helmet, Eye protective glass, Face Mask, Hand gloves, Safety shoes.
• Check the hand tools are free from oil and grease.
• File cleaning from wire brush and hammer handle should be tight and fitted.
• Use proper size and type of hand tools for the job.

Q.2 What is the purpose of maintenance of machinery?

• Servicing and overhauling of machinery after certain working hours to prevent sudden breakdown.
• It increases the life of machinery.
• It improves the efficiency of machine.
• It prevents sudden accidents.

Q.3 What are the lifting devices and other tools required to lift and shift heavy items in the Engine Room?

Overhead Crane, Chain Block, Ratchet Block, Shackle, Eye Bolt, Wire Sling.

Q.4 What will you check while using the lifting tools?

• Check the SWL of lifting tool.
• Ensure lifting tools are in good condition.
• They should be free from oil and grease.
• Properly lashed and secured before lifting.

Q.5 How will you identify a Spanner size?

It is written on the body of the spanner.

Q.6 How to open a nut if it has become round?

• File the opposite side of the nut and try with open jaw spanner.
• Try to open with a pipe spanner.
• Cut with chisel hammer or hacksaw.
• Use gas cutting with a hot work permit.

Q.7 How to fit and remove a stud on a Machine?

• Fit and lock two nuts on the stud head and turn the top nut clockwise to fix.
• For removing, turn the bottom nut anticlockwise.

Q.8 How will you remove a broken Stud?

• Put a mark with centre punch at the centre of the stud head.
• Drill a small diameter deep hole at the centre.
• Insert a proper size stud extractor in the hole.
• Turn the extractor with a small spanner anticlockwise.

Q.9 Name and Identify different TOOLS.

(Answer to be illustrated with images or labels as per course content.)

Q.10 What is the function of the Auxiliary Engine? OR How Electricity is generated?

It turns the alternator to generate electricity.

Q.11 What is the function of Main Engine?

It turns the propeller of the ship to move the ship ahead and astern.

Q.12 What is the Function of Centrifugal Purifier?

It separates solid impurities and water from oil by centrifugal force.

Q.13 What will you check when a Purifier is in operation?

• Check gear oil in the gearcase.
• Check fuel oil inlet and water outlet.
• Check motor load and temperature.
• Check for abnormal noise, vibration, or leakage.

Q.14 Identification of different parts of Purifier.

Duplex gear, Flexible pipe, Oil inlet, Oil outlet, Spindle, Separating disk, Top disk, Bowl, Bowl cover, Pressure gauge, Relief valve, Centrifugal clutch, Sight glass.

Q.15 Strainer and Filter

Strainer: Separates large solid impurities from any fluid (liquid, air, gas, oil).
Filter: Separates fine solid particles from liquid or air or gas.

Q.16 What is the function of OWS (Oily Water Separator)?

It separates oil and water from an oily water mixture.

Q.17 What is the function of Incinerator? Type of garbage not allowed to incinerate.

• It burns certain types of garbage.
• Not allowed: Plastic, Hospital Waste, PCB, Large particle garbage.

Q.18 What is a Heat Exchanger?

It exchanges heat between two media passing through it without mixing them.

Q.19 Name three types of Heat Exchanger.

Preheater, Refrigerator, Jacket Cooling Water, Evaporator, Condenser.

Q.20 What is STP (Sewage Treatment Plant)? How is the treatment done? What chemical is used?

• Sewage treatment is done biologically to remove harmful substances before discharge.
• Chemicals used: Chlorine and Sodium Hypochlorite.

Q.21 What is the difference between pressure and vacuum?

Pressure is force above atmospheric pressure, while vacuum is force below atmospheric pressure.

Q.22 What is the function of Fresh Water Generator?

It generates fresh water from sea water.

Q.23 What are the advantages of generating fresh water on board?

Ship can carry more cargo instead of water, zero production cost, and high-quality water is obtained.

Q.24 What is a Hydrophore System?

It is a system in which fresh water is supplied continuously for domestic use.

Q.25 What must one know as a Watch Keeper in the Engine Room?

• Knowledge of all alarm systems and actions to handle them.
• Normal parameters of all machinery.
• Location and use of all safety items.
• Actions in case of breakdown of any engine or equipment.

Q.26 How will you take over Watch in the Engine Room?

• Check all parameters of running machinery.
• Check sounding of all important tanks.
• Ensure all machinery is running smoothly.
• Check engine room logbook and follow chief engineer’s instructions.

Q.27 What safety precautions will you take in the Engine Room during bad weather?

• Engine Room should not be on UMS mode.
• Frequently check all parameters of running machinery.
• Check skylight and watertight doors.
• Secure all loose items and stores.
• Maintain lube oil and water level slightly higher than normal.
• Take frequent rounds and ensure everything is normal.

Q.28 What safety precautions will you take in the Engine Room during Dry Docking?

• Fire line must always be pressurised from shore.
• Check electric supply voltage and frequency.
• Do not transfer oil or water tank to tank.
• Maintain frequent fire patrolling.
• Keep emergency escape passage clean and unlocked.
• Keep fire fighting equipment ready.
• Do not allow accumulation of oil rags or garbage.
• Do not allow unauthorised persons in the Engine Room.

Q.29 What safety precautions will you take for receiving a Bunker?

• Conduct pre-bunker meeting.
• Hoist flag or signal for bunkering.
• Close all scupper plugs on deck.
• Keep fire fighting equipment ready.
• Keep SOPEP equipment ready.
• Start bunkering at low pressure and check for leakage.
• Collect 4 samples during operation.

Q.30 Function of a Valve. Identification of different types of valve.

• This is a device which controls the flow of fluid passing through it.
• Types: Globe valve, Gate valve, Butterfly valve, Ball valve, Cock valve.

Q.31 What is a joint?

Joint is used to prevent leakage from two fixed surfaces like pipe flange, valve cover, or pump casing.

Q.32 What is packing?

Packing is used to prevent leakage between the casing and rotating shaft of pumps or rotating spindles of valves.

Q.33 What is used nowadays in place of packing?

Mechanical Seal.

Q.34 Difference between joint and packing. Different materials for packing.

• Joint is used to prevent leakage between two surfaces.
• Packing is used to prevent leakage between the casing and rotating shaft of pumps or valve spindles.
• Materials: Cotton, Jute, Flax.

Q.35 What is meant by a Non-Return Valve (NRV)?

This valve allows flow in one direction only and closes automatically if flow comes from the opposite side.

Q.36 Where do you find Quick Closing Valves fitted? What is their purpose and operation?

• Quick Closing Valves are fitted in every outlet of the fuel oil tank except the double bottom tank.
• They are operated from a remote location outside the Engine Room.
• They are used in case of fire to shut off fuel supply quickly.

Q.37 What will you do if a Valve gland starts leaking? What care will you take while renewing gland packing?

• Tighten the gland nut; if leakage doesn’t stop, add more turns of packing or renew the complete packing.
• Isolate the valve, dismantle and clean all parts.
• Check proper size and thickness of packing.
• Ensure packing ends are cut 180° apart for proper sealing.

Q.38 Function of a Pump. Identification of different types of pump and their uses.

• Pump is a device that pressurises the fluid passing through it.
• Reciprocating Pump: Used for bilge water.
• Gear Pump: For pumping oil and lube oil for auxiliary engines.
• Screw Pump: For lube oil and fuel oil transfer, sludge pumping.
• Centrifugal Pump: Used in ballast, cooling water, and cargo oil systems.

Q.39 What will you check before starting a Pump?

• For Positive Displacement Pump: Open suction and discharge valves, check oil level in gear case, turn by hand for freeness, switch on main supply.
• For Centrifugal Pump: Open suction valve, close discharge valve, ensure chamber is full, turn pump to check freeness, open discharge slowly after pressure builds up.

Q.40 What will you check when any Pump is running?

• Suction and discharge pressure.
• Motor load and temperature.
• Leakage, abnormal noise, or vibration.

Q.41 What are different methods of cleaning Oil (removing impurities)?

Filtration, purification by gravity in the settling tank, and purification by centrifuge.

Q.42 What is the purpose of a Fuel Oil Settling Tank?

To allow water and sludge to settle down before purification.

Q.43 What is an Expansion Tank?

Also known as a Header Tank, it’s connected to the diesel engine cooling water system. It provides makeup water when the cooling system level drops — hence also called a water makeup tank.

Q.44 What is the use of Air Compressor?

It compresses atmospheric air to higher pressure.

Q.45 What are the uses of Compressed Air?

1. Starting main and auxiliary diesel engine.
2. Operation of some machines and tools.
3. Blowing ship whistle.
4. Pneumatic control system.
5. Cleaning different parts.
6. Charging hydrophore system.

Q.46 What is the use of Drain Cock, Fusible Plug, Relief Valve and Manhole Door of Air Receiver?

Cock – used for blowing through gauge glass in a boiler.
Drain – used to drain oil and water in air bottles.
Fusible plug – melts when air bottle temperature rises excessively to prevent explosion.
Relief valve – releases excess pressure.
Manhole door – for internal inspection and repair work.

Q.47 What precautions will you take while using Compressed Air for cleaning?

1. Drain oil and water from air bottle.
2. Secure the flexible pipe properly and hold the pipe end firmly.
3. Open the correct pressure valve slowly.
4. Direct the air only to the part being cleaned.
5. Never direct the air towards any person.

Q.48 What will you check before starting an Air Compressor?

1. Check the lube oil level in crankcase is normal.
2. Check the filling valve of the air bottle is open.
3. Check compressor discharge valve is open.
4. Check cooling water valves are open.
5. Turn the compressor to see it is free.
6. Open H.P and L.P drain valves.
7. Check the main power switch is ON.
8. Now the compressor is ready for starting.

Q.49 What checks will you carry out while the Air Compressor is running?

1. Check lube oil level in crankcase is normal.
2. Check lube oil pressure is normal.
3. Check air bottle pressure gauge if it is increasing.
4. Check HP and LP stage pressures are normal.
5. Check temperature of cooling water and discharge air are normal.
6. Check compressor is taking normal load.
7. Check unloader operates as per timer.
8. Check no abnormal noise or vibration.
9. Check motor temperature.
10. Check for air and water leakage.

Q.50 What is the function of a Boiler? State names of Boiler Mountings.

It generates and distributes steam.
Mountings:
1. Steam stop valve
2. Water feed check valve
3. Steam pressure gauge
4. Two water level gauge glasses
5. Two safety valves
6. Air vent valve
7. Manhole door
8. Blow-off valve cock

Q.51 Different types of Boiler. What is an Economiser or an Exhaust Gas Boiler?

1. Oil fired boiler
2. Exhaust gas boiler

Q.52 What are the uses of Steam?

1. For heating heavy fuel oil in storage and settling tanks.
2. For heating heavy fuel oil for main engine.
3. For heating heavy oil and lube oil for purification.
4. For heating domestic fresh water.
5. For heating accommodation in cold climate.

Q.53 What parameters will you check while keeping watch on a running Boiler?

1. Steam pressure.
2. Water level in both gauge glasses.
3. Fuel oil pressure and temperature.
4. Flame condition.

Q.54 How will you ensure that Boiler water Level Gauge Glass is working?

By blowing through the gauge glass.

Q.55 What is an Economiser? What is the other name of Economiser?

An economiser acts as a heat exchanger and preheats water before feeding it to the boiler. It is also called a feed water heater.

Q.56 What are the maintenance jobs done in a Boiler?

1. Clean and check water and steam space.
2. Overhaul all mountings.
3. Rectify defects in safety or automation systems.
4. Repair steam and water leakage from any pipe joints.

Q.57 What are the major components of a Fridge System?

Compressor, Evaporator, Condenser.

Q.58 What parameters will you check when the Fridge System is in operation?

1. Suction pressure.
2. Discharge pressure.
3. Lube oil pressure.
4. Lube oil level.
5. All rooms’ temperature.
6. Motor load.

Q.59 What is the difference between a two stroke and four stroke Engine?

2 Stroke Engine: When one complete revolution of Crankshaft to complete one Power Stroke. Suction, Compression, Power and Exhaust are Completed in One Revolution.
4 Stroke Engine: When two complete revolutions of Crankshaft to get one Power Stroke. Suction, Compression, Power and Exhaust are Completed in two Revolutions.

Q.60 Name major components of a diesel Engine.

1. Cylinder Head
2. Cylinder Block
3. Bed plate
4. Crankshaft
5. CamShaft
6. Gear pump
7. Main gallery pipe
8. Inlet valve
9. Exhaust valve
10. Relief Valve
11. Air Starting valve
12. Indicator valve
13. Fuel oil value
14. Piston
15. Piston Rod

Q.61 State different safety features of a Diesel Engine.

1. Relief Valve
2. Crankcase Relief door
3. Over speed trip.
4. Oil mist detector.
5. Lube oil Low pressure trip.

Q.62 What is meant by the stroke of a piston?

The movement of a piston from TDC to BDC or BDC to TDC is called the stroke of a piston.

Q.63 What is the function of the Main Engine and Auxiliary Diesel Engine?

Main Engine - It turns the propeller to move a ship Ahead or Astern.
Auxiliary Diesel Engine - It turns the alternator to generate electricity.

Q.64 What are the different strokes of a four stroke Diesel Engine?

Four Strokes of Diesel engine are:
Suction stroke
Compression stroke
Power stroke
Exhaust stroke.

Q.65 What will you check for starting an Auxiliary diesel Engine?

Start Pre-lubricating pump
Check the lube oil level in crankcase
Check Fuel oil level in service tank
Open all system valve
Open indicator valve
Open air starting value
Turn the engine to check freeness

Q.66 What parameters will you check for an Auxiliary Diesel Engine in operation?

Check Lube oil level and pressure
Check cooling water level and temperature
Check fuel oil level and temperature
Check lube oil in turbocharger
Check any leakage
Any abnormal sound and vibration
Check exhaust gas temperature

Q.67 What is the purpose of Lubrication of machinery parts?

Reduce friction between sliding parts
Prevents corrosion
Reduce temperature
Insure smooth operation

Q.68 What happens if Lubricating oil flow becomes less in machinery parts?

It increase the friction between sliding parts
Increase temperature of sliding parts
Bearing will be damaged
Not smooth operation will be carried out

Q.69 What happens if the Lubricating Oil filter starts getting choked up?

It will cause Pressure drop
Increase friction between sliding parts
Increase temperature
Rotating parts will get overheated and engine may be seized

Q.70 What are the different methods of lubrication of machinery parts?

Splash lubrication
Force feed lubrication
Grease cup lubrication
Recirculation

Q.71 What is grease/ What is a grease gun / What is a grease nipple?

Grease: Grease is semi-solid lubricants made by blending oil and Special type of soap.
Grease gun: It is a gun used for greasing Lubrication purposes. Types - Manual types, Pneumatic types
Grease nipples: It is a non-return ball valve used for greasing.

Q.72 What is the function of a Turbocharger?

It supplies charged air to the engine so that the engine can burn more fuel to generate more power.

Q.73 What is the advantage of having Turbocharger with a diesel engine?

It supplies charge air to the diesel engine So, that engine can burn more fuel to generate more power.
It increases the efficiency of the engine.

Q.74 What are mountings fitted in the cylinder head of a four stroke Diesel Engine?

Air starting valve
Fuel injector
Indicator valve
Inlet valve
Exhaust valve
Relief valve
Rocker arm
Valve spring
Valve stem

Q.75 What is the function of Camshaft?

It converts rotary motion to reciprocating motion.
It controls opening and closing of the inlet and exhaust valves

Q.76 What is the purpose of Cylinder Liner Lubrication of a Diesel Engine?

To reduce friction between liner and piston ring.
To neutralise the corrosion on the liner due to combustion gas.
To form an insulating oil film between liner and hot gas.

Q.77 What are the maintenance jobs done in Diesel Engine?

Overhauling of all mounting on the cylinder head.
Clean lube oil filter, fuel oil filter
Clean all piston rings

Q.78 Name of different types of paint and their uses.

To Prevent from Rusting and also to give it a beautiful look.
Types: Alkyd, Bituminous, Chlorinated Rubber, Epoxy, Antifouling, Boot topping

Q.79 What is the purpose of primer paint? Name at least two types of primer paint?

It adheres to the surface, prevents corrosion and also provides a good base for under coats.
Red Oxide
Zinc chromate
Red lead

Q.80 Name of Tools used for surface preparation?

Needle gun
Pneumatic wire brush
Disc grinder
Chipping hammer

Q.81 How will you prepare a steel surface for painting?

Wear proper PPE with safety goggles, face mask, hand gloves.
Remove all loose metal chips and rust with chipping tools and wire brush.
Blow through all dust and rust
Clean oil and grease from the surface.
Wash the surface with clean fresh water and make the surface dry.
Now the surface is ready

Q.82 Name various painting defects and their reasons.

Sagging
Blistering
Holiday
Peeling
Cracking

Q.83 Name different spraying defects. Why is thinner used along with paint?

Spraying Defects: (Incomplete in source data)
Thinner Use: Thinner is used along with paint to adjust its viscosity (thickness) for proper application, especially for spraying, and to help the paint flow and level smoothly.

Q.84 Name different types of Painting brushes.

Flat Brush
Angled Brush/Dogleged Brush
Stencil Brush
Roller Brush.

Q.85 What is airless spray painting?

Airless spray painting is the type of spray painting in which compressed air (oxygen) is not used to atomize or force the paint; instead, the paint is atomized by forcing it through a small tip at very high pressure.

Q.86 What are the uses of Chemicals on board a Ship?

Chemicals are used in :
Diesel Engine Cooling water treatment
Boiler water treatment
Fuel oil treatment
Sewage treatment.
Cleaning different parts.
Used in paint.
Fill fire extinguisher.

Q.87 Precautions while handling Chemicals.

1. Wear full sleeve boiler suit with apron
2. Chemical proof/resistance goggles
3. Latex rubber gloves
4. Face mask

Q.88 What are the special personal protective gear while handling chemicals.?

1. Wear full sleeve boiler Suit with apron
2. Chemical proof goggles
3. Latex rubber gloves
4. Face Mask

Q.89 Where will you store chemicals?

1. In a well ventilated separate room with good light
2. There should be fire fighting arrangements

Q.90 What will be your first action if chemical falls in your eyes?

Thoroughly wash the eyes with plenty of Clean fresh water for some time.

Q.91 What will you check while taking rounds in Steering compartment?

Check oil level in a tank.

Q.92 What do you mean by an Emergency?

An emergency is a grave situation which poses an immediate risk to life, health, property and environment.

Q.93 Name some emergency situations that may occur in the Engine Room?

Fire or risk of fire, Black out (Generator failure), Main Engine failure, Major oil spillage, Flooding of E/R, Major accident, Explosion (Engine Crankcase, Boiler backfire)

Q.94 Name of different types of alarms in the Engine Room.

1. Machinery alarms
2. General emergency alarm
3. Co2 flooding alarm
4. Fire alarm

Q.95 What do you mean by Audio Visual Alarm?

This means sound and light signals.

Q.96 Action on hearing Fire Alarm, Machinery Alarm, CO2 Alarm.

Fire alarm: on hearing fire alarm all crew (Except the waterkeeper) should report to the Muster Station.
Machinery failure alarm: Identify the machine and Reason for Alarm, Inform the duty Engineer, Rectify the fault
CO₂ flooding Alarm: Immediately leave the E/R, Run away through the Emergency escape route and Report to Muster Station

Q.97 What are the major components of a Fridge System?

Compressor, Evaporator, Condenser, Expansion Valve (or equivalent).

Q.98 What parameters will you check when the Fridge System is in operation?

1. Suction pressure.
2. Discharge pressure.
3. Lube oil pressure.
4. Lube oil level.
5. All rooms’ temperature.
6. Motor load.

Q.99 What are the different Classes of Fire?

There are five classes of fire:
1. A class fire
2. B class fire
3. C class fire
4. D class fire
5. F/K class fire

Q.100 What are the elements required to make a fire?

1. Heat
2. Fuel
3. O₂ (Oxygen)

Q.101 What are the elements in the Fire Quadrant?

1. Heat
2. Fuel
3. O₂ (Oxygen)
4. Chain reaction

Q.102 What do you mean by Portable Fire Extinguishers & Non Portable Fire Extinguishers?

Portable fire extinguisher:
→ It is used for Small fires.
→ Its max weight = 23 kg (or 28 kg max limit mentioned in source).
→ One person should be able to carry it.
Non portable fire extinguisher:
→ It is used for a large fire.
→ One Person Can't able to carry it.
→ It is carried with a Wheel system.

Q.103 What is the maximum weight of a Portable fire extinguisher?

Maximum weight of a Portable fire extinguisher is 23 kg (or 28 kg depending on regulation/context).

Q.104 What purpose portable Extinguishers are used?

It is used to extinguish small fire.

Q.105 Name of different types of Portable Fire Extinguishers available in Ship?

1. Water type
2. CO₂
3. Mechanical foam
4. DCP (Dry Chemical Powder)
5. Wet Chemical

Q.106 What are the portable fire Extinguishers available in the Engine Room of a Ship?

1. CO₂ type fire extinguisher
2. Mechanical foam type
3. DCP type

Q.107 Name Fire Extinguishing arrangements for Large fires in a Ship?

1. CO₂ flooding
2. Water hypermist (or Water Mist/Sprinkler System)
3. High expansion foam
4. Mechanical foam

Q.108 How Fire is Detected in a Ship?

Automatically by fire detector (Smoke, Heat, or Flame detectors).

Q.109 How the fire alarms are activated?

Fire alarm is activated:
1. Automatically by fire detectors
2. Manually with push switch (Call Points)

Q.110 What are the different methods of raising fire alarms?

1. Automatically by fire detectors
2. Manually with push switch (Call Points)
3. Walkie-talkies, Telephone, P.A system
4. By raising voice fire-fire-fire

Q.111 What type of extinguisher will you use for different classes of fire?

A-class fire – Water type fire extinguisher
B-Class Fire – Mechanical foam
C-Class fire – CO₂ or DCP
D-class fire – Dry powder (DCP)
F/K-Class Fire – Wet chemical

Q.112 What actions will you take if the motor of a running pump catches Fire?

1. Raise the alarm
2. Stop the pump (isolate power)
3. Close the nearby fire damper.
4. Extinguish the fire by CO₂ or DCP

Q.113 How many fire Pumps are there in the Engine Room of a cargo Ship?

2 fire Pumps in E/R.

Q.114 What is an Emergency Fire pump? Where is its location? How is it started?

Emergency fire pump: A pump used to extinguish fire when main fire pump fails.
Location: Outside the E/R in separate Compartment.
Started: Usually started with small diesel Engine (or dedicated power source).

Q.115 Identification of different types of Fire extinguishers, Fire Hydrant, Fire Hose with Nozzles, Smoke & Flame Detector.

Answer: Refer to Textbook/Ship Familiarisation for visual identification.

Q.116 State name of the items fitted with the fireman's outfit.

1. Fireman's suit
2. SCBA Set (Self-Contained Breathing Apparatus)
3. Rigid helmet
4. Fire Proof Rubber boots
5. Fireproof lifeline
6. Fire axe (electrical Insulated)
7. Gloves (waterproof and electrical Insulated)
8. Safety light
9. walkie-talkie

Q.117 What is international shore coupling?

This is a universal coupling of same size in all the ships throughout the world above 500 GRT.
It is used to take fire main Supply from another Ship or Shore to extinguish major fire when ship's own fire fighting equipment is dead.

Q.118 What is a conductor and insulator in a cable?

Conductor: Inner metallic core which conducts electric current is called conductor in a cable.
Insulator: The outer covering which doesn't conduct electric current is called an insulator.

Q.119 State the importance of maintaining cables in good condition.

1. It prevent the leakage of current
2. Prevent Electric shock
3. Prevent Fire
4. Prevent Loss of life and property

Q.120 State the different safety devices used in electric circuits.

1. MCB (Miniature Circuit Breaker)
2. Fuse
3. Earth fold detector
4. Over load trip

Q.121 What is the importance of an emergency generator and where it is fitted? Where does it give supply (power)?

Importance: Emergency generators provide electricity in case of main generator failure (Blackout).
Location: It is fitted outside the engine room In separate compartment.
Supply to:
1. Emergency light
2. Communication
3. Navigational light
4. Alarm System
5. Fire detectors

Q.122 State the use of battery.

Battery gives electric power to all generators including emergency generator for starting, and also provides immediate supply to essential systems:
1. Emergency light
2. Communication
3. Navigational light
4. Alarm System
5. Fire detectors

Q.123 What action will you take in case of a fire involving electrical equipment/ system?

1. Raise the alarm
2. Stop the machine (Isolate power)
3. Close the nearby fire dumper
4. Extinguish fire with CO₂ or DCP.

Q.124 What safety precautions will you observe while working on any electrical appliances?

1. Stop the machine & Switch off the main supply
2. Take out the fuse
3. Check once again with tester circuit is dead
4. Put a warning notice on the main switch
5. Remove the safety guard
6. Use insulated and current type of tools
7. Must take work permit for high voltage job.

Q.125 If you notice someone is under electric shock, what will be your first action?

1. Switch off the main supply
2. Disconnect the person with insulation material
3. Place him in comfortable position
4. Apply artificial respiration if required
5. Send somebody to call a doctor

Q.126 How will you isolate an electrical machine for maintenance?

1. Switch off the main supply
2. Take out the fuse
3. Check once again with tester that there is no electric supply

Q.127 What are emergency means of lighting when there is a blackout due to power failure?

1. Emergency generator
2. Battery system (Emergency lighting and low-level lighting)

Q.128 What is the function of a motor and a generator?

Motor consume electricity (Electrical to Mechanical energy)
Generator produce electricity (Mechanical to Electrical energy)

Q.129 How is electricity produced on board?

Electricity can be produce by:
1. Auxiliary engine (Diesel Generators)
2. Emergency generator
3. Shaft generator
4. Turbo alternator
5. Battery system

Q.130 Name personal protective equipment to be used while welding.

1. Flame proof boiler suit with apron (Leather).
2. Safety helmet
3. Eye protective shield (Welding Helmet/Mask)
4. Leather gloves
5. Safety shoes
6. Arm guard

Q.131 Name types of welding.

There are two types of welding:
1. Electric arc welding
2. Gas welding

Q.132 Name the equipment used for electric arc welding.

1. Electric step down transformer
2. Electric welding cable
3. Earth clamp
4. Electrode holder
5. Electrode
6. Wire brush
7. Chipping hammer

Q.133 Name the equipment used for gas welding.

1. Oxygen cylinder
2. Acetylene cylinder
3. Pressure gauge
4. Pressure regulator
5. Gas welding torch
6. Gas welding pipe
7. Filler rod
8. Chipping hammer
9. Wire brush
10. Spark light

Q.134 What should be the arc length with relation to the electrode?

The arc length should be equal to the diameter of the electrode.

Q.135 What will be the effect of too long Arc length?

1. Flat Bead
2. Loose Penetration
3. Coarse Splatter

Q.136 What will be the effect of too short Arc length?

1. Uncontrolled penetration slag
2. Electrode stuck to the weld plate

Q.137 How will you adjust the welding current?

1. Select the electrode size
2. Adjust current based on current required for the size of electrode

Q.138 The welding Transformer increases or decreases the electric current?

It always increases the current at the secondary side (while decreasing the voltage).

Q.139 Dimension of the cable of the earth clamp should be equal to the dimension with what other cable?

Arc welding cable (Electrode holder cable).

Q.140 Why are electrodes kept in dryers?

To keep electrodes dry and prevent oxidation/moisture absorption (which can cause weld defects).

Q.141 What safety precautions you will take before commencing welding.

For Arc welding:
1. Wear proper PPE.
2. Must take a hot work permit.
3. Check any leakage in arc welding cable
4. Connect one end of earth clamp to weld plate and other end to power source
5. Keep fire extinguisher nearby.
6. Welding area should be free from flammable items.
For Gas welding:
1. Wear proper PPE.
2. Must take a hot work permit.
3. Check gas welding pipe leakage or not
4. Check pressure gauge and regulator in working condition
5. Keep fire extinguisher nearby.
6. Welding area should be free from flammable items.

Q.142 How will you recognise the gas cutting torch and gas Welding Torch?

Gas cutting torch:
1. It has two pipes (one for oxygen, one for Oxygen and Acetylene mixture)
2. It has a leaver to control oxygen (cutting jet)
3. It has multiple holes at the tip.
For Gas welding torch:
1. It has a single pipe with only one hole at the tip.

Q.143 What gas is used in gas welding?

Oxygen and Acetylene.

Q.144 State precautions to be taken while working on the Lathe machine.

1. Wear proper PPE (safety helmet, safety goggles, tight and dry boiler suit)
2. Don't put the chuck key on a chuck
3. Jaw should be proper centering
4. Cutting tools should be proper grinded and centering

Q.145 State the names of Machines found in Ship’s workshop.

1. Lathe machine
2. Grinding machine
3. Electric arc welding machine
4. Gas welding machine
5. Drill machine
6. Bending machine

Q.146 State importance of Guard fitted for Gear drives or Pulleys.

To avoid personal injury from touching the rotating parts.

Q.147 State the safety procedures before working on a drive (machine).

1. Stop the machine
2. Switch off the main supply
3. Take out the fuse
4. Check again with tester circuit is dead
5. Put a warning notice on the main switch
6. Remove the safety guard.

Q.148 State safety procedures before restarting a machine after repair.

1. Check no tools left on machine
2. Replace the safety guard
3. Check if lubrication is needed
4. Remove warning notice
5. Turn the machine to check it is free or not
6. Switch on the electric power

Q.149 Mention some do and don't in using metal cutting for general safety.

Do:
1. Ask if any doubt
2. Use current tools and equipment
3. Keep tools and equipment at good place when it is not use
4. Take care of tools and equipment
5. Know the location of nearest fire extinguisher and how to use
6. Keep exit fire door clear at all times.
Don'ts:
1. Don't run in the workshop
2. Don't throw tools anywhere
3. Don't touch any equipment without knowledge
4. Don't leave your running machine when required
5. Don't give first aid in injury without knowledge

Q.150 Name the safety features provided in the machine.

1. Safety guard
2. Emergency off switch (E-Stop)
3. Isolator (Main switch)
4. Locking mechanism