更多"If the meter needle of the oxygen i"的相关试题:
[单项选择]A combustible gas indicator meter is calibrated to read the percentage of（）.
A. vapor to oxygen
B. the flammable limit concentration
C. the autoignition concentration
D. the lower explosive limit concentration
[单项选择]A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.
A. purifies
B. combinations
C. concentrations
D. filters
[单项选择]An oxygen indicator will detect （）.
A. concentrations of explosive gas
B. an oxygen deficiency in a space
C. the presence of harmful amounts of carbon monoxide
D. All of the above
[单项选择]After each reading of an oxygen indicator, the instrument should be purged with（）.
A. CO2
B. fresh air
C. the tested compartment's air
D. water
[单项选择]An oxygen indicator can be used to determine if there is（）.
A. sufficient oxygen in a compartment to support life
B. combustible gases present
C. hydrogen gases present
D. All of the above
[单项选择]After each reading of an oxygen indicator，the instrument should be purged with（）.
A. CO2
B. fresh air
C. the tested compartment's air
D. water
[单项选择]While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.
A. enter the tank safely
B. suspect the accuracy of the reading
C. ventilate the tank
D. test for nitrogen
[单项选择]GM cannot be used as an indicator of stability at all angles of inclination because（）.
A. M is not fixed at large angle
B. there is no M at large angles
C. G is not fixed at large angles
D. there is no G at large angles
[单项选择]Differential needle valves used in fuel injectors are directly closed by（）
A. cam action
B. spring force
C. fuel oil pressure
D. firing pressure
[多项选择]使用gprs indicator caculator可以（）
A. TBF建立和释放情况
B. 数据流量统计
C. 小区GPRS拥塞统计
D. GPRS指标历史趋势统计
[名词解释]土壤指示植物 indicator plant of soil
[单项选择]Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at （）
A. maximum power at a normal load
B. maximum power and load under normal conditions
C. half speed and normal temperature
D. normal operating temperature without a load
[单项选择]Oxygen corrosion in auxiliary boilers is prevented by treating the boiler feed tank with either sodium （）
A. sulfite or hydrazine
B. sulfite or hygroscopic sulfite
C. bromide or hydrazine
D. bromide or hygroscopic sulfite
[单项选择]If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will （）
A. have a larger than normal dead band
B. produce excessive speed response to a load change
C. respond slowly to any change in engine load
D. stabilize engine speed at the new governor setting
[单项选择]The needle valve will open when the fuel pressure acting on the needle valve （） exerts a sufficient force to overcome the spring compression.
A. tape face
B. tapered face
C. surface
D. thinner face
