更多"What is NOT a function of the steam"的相关试题:
[单项选择]Foaming in the steam drum may be caused by （） in a boiler.
A. oxygen in the water
B. poor boiler design
C. density too high
D. excessive steam demand
[单项选择]What is an advantage of diesel over steam turbine propulsion? （）
A. Less fuel consumption per SHP
B. Diesel fuel costs less than bunker C or its equivalent
C. Less routine maintenance required
D. Less weight per SHP
[单项选择]What is an advantage of a steam turbine over a diesel for the main propulsion?（）
A. Faster response from ahead to astern
B. Less fuel consumption
C. Cheaper initial installation cost
D. Less weight per unit of horsepower
[单项选择]What function is provided by the crankcase ventilation system on some diesel engines?（）
A. Increases the sludge forming tendency of lube oil
B. Prevents the accumulation of combustible gases
C. Improves lube oil cooling
D. Improves cold weather starting
[单项选择]What is the function of thermostatic expansion valve in a compression refrigeration system?（）
A. nonexistent
B. for controlling pressure
C. for controlling superheat
D. for controlling the solenoid valve
[单项选择]What is the function of the command switchport trunk native vlan 999 on a？（）
A. It designates VLAN 999 for untagged traffic.
B. It blocks VLAN 999 traffic from passing on the trunk.
C. It createsa VLAN 999 interface.
D. It designates VLAN 999 as the default for all unkown tagged traffic.
[单项选择]What following is not among the function of SOLAS ships?（）
A. receive shore-to-ship distress alerting
B. transmit ship-to-shore distress alerting
C. receive message for public correspondence
D. transmit and receive locating signals
[单项选择]What is the function of wearing rings found on some centrifugal pumps? （）
A. Absorb erosion of high velocity discharge stream
B. Seal pump shaft against entry of air
C. Isolate the outlet side from the inlet side
D. Dampen the turbulent discharge flow
[单项选择]What is the function of the after-cooler installed in the diesel engine air intakes system?（）
A. Decrease the air density
B. Increase the exhaust temperature
C. Decrease the lube oil temperature
D. Increase the air density
[单项选择]What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5（）。
A. It creates a global address pool for all outside NAT transactions
B. It establishes a dynamic address pool for an inside static address
C. It creates dynamic source translations for all inside local PAT transactions
D. It creates a one-to-one mapping between an inside local address and an inside global address
E. It maps one inside source address to a range of outside global addresses
[单项选择]What is the function of the thrust bearing?（）
A. Prevents lateral movement of the slow speed gear
B. Transmits propeller thrust to the hull
C. Keeps spring bearings in line
D. Prevents main reduction gear axial movement
[单项选择]What is the function of an air receiver in the compressed air system on a ship? （）
A. Condenses moisture
B. Provides overpressure protection
C. Purifies the air
D. Acts as an accumulator
[单项选择]What is the function of an engine’s stationary parts?（）
A. To add power to the engine
B. To keep the engine firmly attached to its supporting base
C. To keep moving engine part in their proper relative positions
D. To rotate the crankshaft
[单项选择]What is a function of the wearing rings used in most centrifugal pumps?（）
A. Absorb erosion of high velocity discharge stream
B. Seal pump shaft against entry of air
C. Isolate the discharge side from the suction side
D. Dampen the turbulent discharge flow
