更多"Which of the precautions listed sho"的相关试题:
[单项选择]Which of the listed precautions should be taken when cleaning the internals of a motor with compressed air?（）
A. Open the machine on both ends so as to allow the air and dust to escape
B. Be certain that the circuit breaker is opened and tagged on the feeder panel
C. Be certain that the air is clean and as dry as possible
D. All of the above
[单项选择]What safety precautions should be observed by the crew while working around machinery in an engine room?（）
A. They should wear safety shoes
B. They should wear ear protection
C. They should not wear jewelry
D. All of the above
[单项选择]Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?（）
A. Commence draining that tank as quickly as possible
B. Seal off all vents to that tank
C. Activate the CO2 system to that tank
D. Shut off the steam heating coils
[单项选择]Which of the actions listed should be taken by the engineer on watch when the general alarm is sounded continuously for 10 seconds?（）
A. Engine room ventilation should be started
B. Main engines should be secured
C. The fire pump should be started
D. The fixed CO2 system should be activated
[单项选择]Which of the valves listed should be used either in the fully opened or the fully closed position?（）
A. A gate valve
B. A globe valve
C. Any check valve
D. Any needle valve
[单项选择]Which of the following precautions should always be carried out in dry dock?（）
A. Liquids should never be transferred between tanks without consulting the dock master
B. If sea valves have been disassembled, all bonnets must be checked for leakage when the ship is re-floated
C. Before re-floating, all sea chest strainers should be verified as having been replaced
D. All of the above
[单项选择]Which of the listed items should be secured before performing any maintenance on a solenoid operated air start valve?（）
A. Electric power and starting air
B. Lube oil standby pump and control air
C. Hydraulic switch and engage jacking gear
D. Motor drain and pneumatic control system power
[单项选择]Which of the listed pre-start procedures should be carried out prior to starting a crosshead type diesel engine after an overhaul?（）
A. Pre-lube cylinders with hand cranks
B. Open all air space drain cocks
C. Open all indicator valves
D. All of the above
[单项选择]What additional precautions should be taken when making temporary repairs to a ship that is operating when hydrogen sulfide is present?（）
A. Seal off all tank and compartment ventilation
B. Remove all bulk materials from the P-tanks
C. Provide respiratory protection and monitoring
D. All of the above
[单项选择]Which statement is FALSE concerning precautions during fueling operations?（）
A. All engines，motors，fans，etc. should be shut down when fueling
B. All windows，doors，hatches，etc. should be closed
C. A fire extinguisher should be kept nearby
D. Fuel tanks should be topped off with no room for expansion
[单项选择]The master should（）necessary precautions to prevent accidents or damage.
A. do
B. take
C. set
D. have
[单项选择]Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?（）
A. The coolant temperature must be maintained at 180℃
B. The thermostatic bypass valves must be manually opened before the engine is started
C. The pressure cap must be removed while the engine is secured
D. Electrical power to the heater must be secured before the cooling system is drained
[单项选择]Corrosive liquids and acids should have which kind of label?（）
A. Skull and crossbones
B. Yellow and white
C. Red and white
D. White and black
[单项选择]It should be observed（）the master is not bound to show both the number of packages and the weight.
A. that
B. which
C. where
D. when
[单项选择]Which is NOT a safety precaution to be observed during the loading of LFG?（）
A. Report any leakage of cargo
B. Make sure the rake ends of the barge are completely dry and mopped
C. Ascertain that the hoses to be used are in good order
D. Be on the lookout for work being accomplished ashore in the vicinity of the barges
[单项选择]Which of the listed refrigeration system components keeps the refrigerant circulating through the system?（）
A. Expansion valve
B. Condenser
C. Evaporator
D. Compressor
[单项选择]Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
A. Sensitivity
B. Power
C. Speed droop
D. Compensation
