更多"Pressure gradient is a measure of（）"的相关试题:
[单项选择]A（）is created by a pressure gradient or slope in the water level.
A. gradient current
B. density current
C. swift current
D. torrent current
[单项选择]The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）
A. join with
B. mix
C. be equal to
D. be constant
[单项选择]High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
[单项选择]A steep barometric gradient indicates （）.
A. calms
B. light winds
C. strong winds
D. precipitation
[单项选择]The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.
A. soluble state
B. solid state
C. liquefied state
D. inert state
[单项选择]渐变工具（Gradient Tool）有几种渐变形式？（）
A. 3种
B. 4种
C. 5种
D. 6种
[单项选择]Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.
A. flash point
B. upper explosive limit
C. lower explosive limit
D. fire point
[单项选择]The most common instrument used to measure diesel engine exhaust pressure is the （）
A. pyrometer
B. bourdon gauge
C. pneumercator
D. manometer
[单项选择]Ammeter is to measure the （）.
A. current
B. voltage
C. power
D. frequency
[单项选择]1963年（）制作了第一部计算机动画片"Two gyro gravity gradient attitude control system"。
A. Bell实验室
B. MIT
C. SCANIMATE公司
D. CAESAR公司
[单项选择]Rotating flyweights acting against spring pressure make a simple type of （）.
A. governor
B. safety valve
C. reducing valve
D. feed water regulator
[单项选择]Which instrument is used to measure the relative humidity of air?（）
A. Hydrometer
B. Hygrometer
C. Spectrometer
D. Barometer
[单项选择]The （）is used to measure power.
A. ammeter
B. voltmeter
C. wattmeter
D. frequency meter
[单项选择]In order to accurately measure very low pressures, which of the instruments listed should be used?（）
A. Compound gage
B. Bonrdon tube
C. Manometer
D. Deadweight gage
[单项选择]Measure （） by means of lead wire.
A. the clearance of the main bearing
B. the play of the miler bearing
C. the gap of the main bearing
D. the tolerance of the main bearing
[单项选择]An ammeter should be used to measure （）
A. the voltage between two points in a circuit
B. circuit continuity
C. current flow in a circuit
D. total or partial circuit resistance
