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单选题
螺圈（Coil）（ ）。
A
B
C
D
E
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更多 “单选题螺圈（Coil）（ ）。A B C D E ” 相关考题
考题
In Henry's experiment，the galvanometer indicated a voltage when______.A. the coil was connected to a batteryB. the coil was disconnected to a batteryC. neither A nor BD. both A and B
考题
A new coil of nylon line should be opened by ______.A.pulling the end up through the eye of the coilB.taking a strain on both endsC.uncoiling from the outside with the coil standing on endD.unreeling from a spool
考题
If kinking results while wire rope is being coiled clockwise, you should______.A.coil it counterclockwiseB.not coil itC.take a turn underD.twist out the kinks under a strain
考题
In order to correctly open a new coil of manila line , you should______.A.pull the tagged end from the top of the coilB.pull the tagged end through the eye of the coilC.secure the outside end and unroll the coilD.unreel the coil from a spool
考题
单选题A refrigerant boils and vaporizes in the （） in a compression refrigeration system.A
liquid receiverB
compressorC
condenserD
cooling coil
考题
单选题A new coil of nylon line should be opened by（）.A
pulling the end up through the eye of the coilB
taking a strain on both endsC
uncoiling from the outside with the coil standing on endD
unreeling from a spool
考题
单选题If a voltmeter is connected across a line, it must be protected with a（）A
shuntB
high-resistance coil in the armature circuitC
low-resistance coil in the armature circuitD
shunt and a coil of high resistance
考题
单选题The coil of wire rotating in the magnetic field produces the（）.A
voltageB
currentC
powerD
frequency
考题
单选题Aboard ship, a grounded field coil in an AC motor can be determined by using a （）.A
portable growlerB
galvanometerC
visual inspectionD
megohmmeter
考题
单选题The temperature of the refrigerant in the evaporator coil depends mostly upon the （）.A
refrigerant pressure in the evaporatorB
cooling water temperature to the condenserC
heat load in the refrigerator compartmentD
solenoid valve in the liquid line
考题
单选题A refrigerant gives up heat when it goes through （）.A
condenserB
regurgitateC
evaporatorD
boil coil
考题
单选题If kinking results while wire rope is being coiled clockwise，you should（）.A
coil it counterclockwiseB
not coil itC
take a turn underD
twist out the kinks under a strain
考题
单选题The thermal expansion valve reacts directly to the （）A
temperature in the space being cooledB
liquid refrigerant pressure at the solenoid valveC
pressure drop across the evaporator coilsD
refrigerant gas superheat at the coil outlet
考题
单选题If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.A
increase the capacity of the coilB
increase the superheat at the bulbC
deliver more refrigerant to the coilD
decrease the capacity of the coil
考题
单选题In order to correctly open a new coil of manila line，you should（）.A
pull the tagged end from the top of the coilB
pull the tagged end through the eye of the coilC
secure the outside end and unroll the coilD
unreel the coil from a spool
考题
单选题Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a（）A
solenoid valveB
low pressure cutout switchC
king valveD
thermal expansion valve
考题
单选题If two AC generators are to be operated in parallel, the load is distributed evenly by（）A
means of rheostat the governor settingsB
a balance coil excitationC
adjusting the governor settingsD
changing excitation
考题
单选题Newspaper accounts say the first powered airplane was flown in 1865 by Jacob Brodbeck and Dowered by coil springs, the airplane reportedly reached treetop heights before crashing into a henhouse.A
Brodbeck and powered by coil springs, the airplane reportedly reachedB
Brodbock, and the airplane, powered by coil springs, reportedly reachedC
Brodbeck, the airplane was powered by coil springs, reportedly reachingD
Brodbeck, although powered by coil springs, the airplane reportedly reachedE
Brodbeck in an airplane powered by coil springs and reportedly reaching
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