Which of the following chemical compounds prevents caking of powder in dry chemical powder fire extinguisher?
Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?
A distinguishing feature of an eductor, when compared to other pumps, is the ______________.
The FIRST thing to do to ensure that a refrigeration unit will not start while undergoing repairs, is to ____________.
In the air conditioning of a ship a “Comfort Zone” constitutes
Which of the following statements describes the purpose of the split inflatable seal installed aft of the primary seal assembly for the propeller shaft?
Sand impregnated with chemicals is kept in metal containers with a shovel, in the engine room, for the following purposes
If the superheat value of a thermostatic expansion valve is set too low________
Which of the following is most suited to act as a deck air compressor?
Which of the following guidelines is considered to reflect good design practices of shipboard steam heating systems?
Before any work is to be carried out on a burner in an automatically fired auxiliary boiler, you should always
To prevent electric shock during electric arc welding
Two compressors should not be run in parallel because
When overhauling engines in bad weather onboard
Old machinery space log book are kept in safe custody
Refractory damage in boiler furnace onboard is caused due to
When securing a flash-type evaporator for an extended period of time, you should _____________.
Which of the listed conditions can lead to cavitation in a centrifugal pump?
Which of the following components in an Inert Gas system ensures that vapours are vented well clear of the working deck? i) High velocity vents ii) Mast risers
In case of failure of control air supply ,some valves continue locked in the position they were at the time of failure . They are said to be-
One of the main differences between the various types of screw pumps is in the __________.
High pressure cut out of a refrigerant system can activate due to which of the following faults?
The primary advantage of a central cooling system is______________________
Pumps impart energy to a fluid but the energy required to bring the fluid to the pump may be provided by________________
Some of the following are preferred refrigerants of the future
In any air system a safety device should be placed between any two points where air can be trapped between any two valves.
The term referring to the number of teeth per inch on a hacksaw blade is known as the
Isolation of filters onboard prior to cleaning is done by
Amount of distilled water produced in fresh water generator onboard decreases with
An acceptable method of dealing with accumulated oil found in the pump room bilges is to ______________.
One function of the air receiver in a compressed air system is to _____________.
Soot blowing of boilers onboard can be carried during
The passenger spaces of a passenger ship is protected against major fires by a
Which of the following type of pumps is most suited to act as Waste Oil Sludge Pump?
Which of the following actions, pertaining to saltwater lubricated stern tube stuffing boxes, is usually observed when the ship is expected to be in port for an extended period?
In the Alcap principle of centrifugal separation______________________
To maximize the effectiveness of soot blowing onboard
At which of the following locations would a duplex pressure gage most likely be located?
Which of the processes listed, consumes the greatest amount of power while producing the greatest amount of heat?
The static positive suction head of a pump is the
A high pressure differential in a main engine fuel oil filter onboard can be best reduced by
Why should a person performing maintenance on an air compressor wire and tag the system valves closed?
Inert Gas System should be capable of delivering Inert Gas at the rate of at least____________________________
The portion of a hydraulic hose that determines its overall strength, is the _____________.
Safety of Gas cylinders used for cutting and welding is ensured
Air conditioning system air handling units must have their air filters cleaned at regular intervals in order to prevent______
A ship is required to carry an Oil Record Book, and must maintain the book as per rules on board for _______________.
The ash content of a fuel oil is significant to the operating engineer because it
Injecting water into the combustion chamber of marine engines is a primary method of reduction of which of the following air pollutants?
A major controlling factor in the location of the condensate return piping from a heating system is/are