更多"A hygrometer is a device used for d"的相关试题:
[单项选择]A hygrometer is a device used for determining（）.
A. the absolute temperature
B. atmospheric pressure
C. wind velocity
D. relative humidity
[单项选择]The device used to limit engine torque at various engine speeds is called a （）
A. speed limiting governor
B. variable speed governor
C. constant speed governor
D. load limiting governor
[单项选择]The device used for preventing the passage of flames into enclosed spaces is called a （）.
A. flame relief valve
B. flame stopper
C. safety valve
D. flame arrester
[单项选择]A device used to tighten up remaining slack in wire rope when you are making up to a tow in inland waters is a（）.
A. tripping line
B. tripping bracket
C. norman pin
D. steamboat ratchet
[单项选择]The device used to store a charged pressure for a hydraulic starting system is called the（）
A. reservoir
B. hand pump
C. accelerator
D. accumulator
[单项选择]A sling is a device used in（）.
A. hoisting cargo aboard a vessel
B. hoisting personnel aboard a vessel
C. securing a small boat to a large vessel
D. hoisting the anchor
[单项选择]A device used to enlarge the size of an existing bore hole, having teeth arranged on its outside circumference to cut the formation as it rotates is a (n)（）.
A. enlarge bit
B. casing bit
C. hole opener
D. casing opener
[单项选择]The safest device used to secure the end of the pendant wire when it is initially passed to the anchor handling vessel is a（）.
A. pelican hook
B. hydraulic deck stopper
C. connecting link
D. shackle
[单项选择]The device used for low-pressure control and high-pressure cutout on a compressor is called a（）
A. cutout
B. pressure controller
C. controller switch
D. cutout switch
[单项选择]For determining the amount of chains used in anchoring operation,which one of the following factors wouldn’t be considered?（）.
A. selection of landmarks
B. character of sea bottom
C. strength of current and wind force
D. radius of ship swing to wind or tide
[单项选择]Which tensioning device is used with chain to secure heavy vehicles aboard Ro-Ro vessels（）.
A. Chain lever
B. Buckle tensioner
C. Adjust-a-matic tensioner
D. Ratchet tensioner
[单项选择]A device commonly used to secure the pendant wire when it is initially passed to an anchor handling vessel is（）.
A. pelican hook
B. connecting link
C. shackle
D. retaining hook
[单项选择]The reference datum used in determining the heights of land features on most charts is（）.
A. mean sea level
B. mean high water
C. mean low water
D. half-tide level
[单项选择]In determining the scope of cable to be used when anchoring，what would NOT be considered?（）.
A. Depth of the water
B. Character of the holding ground
C. maintenance cost for the chain
D. Type of anchor cable
[单项选择]One method of determining crankshaft misalignment is by（）
A. laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two places
B. measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution
C. rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottom
D. taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation
[单项选择]The most accurate method of determining gyrocompass error while underway is by（）.
A. Comparing the gyro azimuth of a celestial body with the computed azimuth of the body
B. Comparing the gyro heading with the magnetic compass heading
C. Determining from the chart the course made good between celestial fixes
D. It cannot be determined accurately at sea due to drift of unknown currents
[单项选择]Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）
A. Check the tag to see when the extinguisher was last charged
B. Release a small amount of CO2; if the CO2 discharges，the extinguisher is acceptable
C. Weigh the extinguisher and compare the weight against that stamped on the valve
D. Recharge the extinguisher at least once each year
