更多"Which of the following statements c"的相关试题:
[单项选择]Which of the following statements concerning frontal movements is TRUE（）.
A. The temperature rises after a cold front passes
B. The barometric pressure rises when a warm front passes
C. A cold front generally passes faster than a warm front
D. A warm front usually has more violent weather associated with it than a cold front
[单项选择]Which of the following statements concerning butterfly valves is correct?（）
A. Special tools are required for lapping or grinding
B. It is impossible to throttle flow with a butterfly valve
C. To close the valve, it is only necessary to turn the handle a quarter of a turn
D. The butterfly valve should never be used in a freshwater system
[单项选择]Which of the following statements concerning cylinder liner wear is true?（）
A. Liner wear is distributed equally between the upper and lower portions of the cylinder
B. Excessive liner wear causes wear between piston ring and groove
C. Excessive, but uniform liner wear will not cause wear between piston ring and groove
D. Liner wear is normally greatest in the middle of the cylinder
[单项选择]Which of the following statements concerning fuel atomization in a diesel engine cylinder is correct?（）
A. The greater the atomization, the greater the penetration
B. The greater the atomization, the less the penetration
C. The degree of atomization has nothing to do with the degree of penetration
D. Atomization and penetration are one and the same
[单项选择]Which of the following statements concerning energy is correct?（）
A. Energy can be created or destroyed
B. Energy may not be transformed
C. The total quantity of energy in the universe is always the same
D. None of the above
[单项选择]Which of the following statements concerning fire-tube boilers is correct?（）
A. Combustion gases flow through the tubes
B. Flames impinge on the tubes
C. Combustion occurs in the tubes
D. Water flows through the tubes
[单项选择]Which of the following statements concerning the lubrication of diesel propulsion engines used in vessels over 300 gross tons is most accurate?（）
A. Lubrication systems using engine driven lube oil pumps do not require any additional independent arrangement when such arrangements have been proven reliable
B. The use of engine driven pre-lube pumps is permitted on vessels with propulsion systems developing less than 500 shaft horsepower
C. When forced lubrication is used for propulsion engines, one independently driven stand-by pumps is to be provided in addition to the necessary pumps for normal operation
D. Lubrication systems where two oil coolers are fitted require a minimum of two temperature control devices which may be actuated by similar sensors
[单项选择]Which of the following statements concerning the rigging of bosuns’ chairs and their use is TRUE（）.
A. Always secure the gantline to the chair with a bowline
B. Always have the chair hoisted with at least three turns on a winch drum
C. Any tools，paint pots etc．should be secured by lanyards
D. When riding a stay，make sure that the bow of the shackle passes through the becket of the bridle
[单项选择]Which of the following statements concerning a simple parallel resistance circuit is correct?（）
A. The voltage drop across each resistor is the same
B. The total current flow equals the reciprocal of the sum of the individual currents
C. The total resistance equals the sum of the individual resistances
D. The total voltage equals the sum of the individual voltages across each resistance
[单项选择]Which of the following statements concerning the water tube and fire tube boilers is not true?（）
A. natural circulation of the water in the water tube boiler is better than that in the fire tube boiler
B. for the same output the water tube boiler will carry less mass of water compared with the fire tube boiler
C. the water tube boiler will cost shorter time for steam raising
D. the water tube boiler require lower skill in operating and maintaining
[单项选择]Which of the statements listed concerning heat transfer is correct?（）
A. Heat is always transferred at a constant rate
B. Heat transfer rate increases as temperature difference increases
C. The rate of heat transfer is not affected by temperature difference
D. The high temperature region is known as a heat sink
[单项选择]Which cargo would require a dangerous cargo manifest? （）
A. Cotton
B. Wheat
C. Sugar
D. Lumber
[单项选择]Which cargo is considered volatile（）.
A. Bunker C
B. Turkey-red oil
C. Sweet oil
D. Iso-Propylamine
[单项选择]Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
A. If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
B. Channel 16 (156.8) may be used for distress messages
C. It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
D. Distress messages should first be transmitted on 2182 kHz
[多项选择]Which of the following statements are true regarding bridges and switches (Choose 3.)（）。
A. Switches are primarily software based while bridges are hardware based.
B. Both bridges and switches forward Layer 2 broadcasts.
C. Bridges are frequently faster than switches.
D. Switches have a higher number of ports than most bridges.
E. Bridges define broadcast domains while switches define collision domains.
F. Both bridges and switches make forwarding decisions based on Layer 2 addresses.
[单项选择]Which of the following statements regarding the use of multiple access lists are valid when configuring a single interface on a Cisco router?（）
A. Application of up to three access lists per protocol to a single interface.
B. No more than two access lists per interface.
C. One access list may be configured per direction for each Layer 3 protocol configured on an interface.
D. The maximum number allowed varies due to RAM availability in the router.
E. An infinite number of access lists that can be applied to an interface, from most specific to most general.
F. Cisco IOS allows only one access list to an interface.
