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117 questions · page 3 of 6. Answer in your head first, then check the solution.

📘 ESAS Mock Board Exam
TypeAll 117Problem solvingObjective 117
DifficultyAll 117Easy 117MediumHard
#41📘 EE Pocket Reviewer RojasEasy
For electrical resistance welding, the metal surfaces must be ____.
ALubricated
BCleaned
CMoistened
DRough
#42📘 EE Pocket Reviewer RojasEasy
For arc welding, the range of current is usually on what range?
A10 to 15 A
B30 to 45 A
C50 to 90 A
D100 to 350 A
#43📘 EE Pocket Reviewer RojasEasy
Which of the following is true about the DC straight polarity welding (DCSP)?
AElectrode is the hottest
BWorkpiece is relatively cool
CBase metal penetration is deep
DHeavily coated electrodes are used
#44📘 EE Pocket Reviewer RojasEasy
An aircraft body is normally ____.
ASpot welded
BGas welded
CSeam welded
DRiveted
#45📘 EE Pocket Reviewer RojasEasy
Which of the following is different from the others?
ASpot welding
BArgon arc welding
CButt welding
DSeam welding
#46📘 EE Pocket Reviewer RojasEasy
What type of transformer is used for ac welding sets?
AStep down transformer
BBooster type transformer
CCurrent transformer
DStep up transformer
#47📘 EE Pocket Reviewer RojasEasy
What is the voltage/current characteristic of a rectifier used for welding?
ARising
BFlat
CDrooping
DLinear
#48📘 EE Pocket Reviewer RojasEasy
In MIG welding, what does MIG mean?
AMetal Inert Gas
BMild Inert Gas
CMedium Inert Gas
DMagnetic Induction Gas
#49📘 EE Pocket Reviewer RojasEasy
What is the power factor of a welding transformer?
AVery low
BUnity
CZero
DVery high
#50📘 EE Pocket Reviewer RojasEasy
The overhead welding position is thought to be the most ____
AHazardous
BEconomical
CUseful
DDifficult
#51📘 EE Pocket Reviewer RojasEasy
A welding load is what kind of a load?
AConstant load
BContinuous varying load
CIntermittent load
DNone of these
#52📘 EE Pocket Reviewer RojasEasy
In resistance welder, the SCR contactor will close 1 during which of the following periods?
AWeld time
BHold time
CSqueeze time
DAll of these
#53📘 EE Pocket Reviewer RojasEasy
Which of the following types of heating process used in surface hardening of steel?
ADielectric heating
BInfrared heating
CInduction heating
DResistance heating
#54📘 EE Pocket Reviewer RojasEasy
What is the function of the choke in arc furnace?
ATo improve the power factor
BTo reduce the severity of the surge
CTo stabilize the arc
DAll of these
#55📘 EE Pocket Reviewer RojasEasy
Which one is an advantage of eddy current heating?
AHeat at very high rate can be produced
BThe amount of heat produced can be accurately controlled
CThe area of the surface over which heat is produced can be accurately controlled
DAll of these
#56📘 EE Pocket Reviewer RojasEasy
A metal bar may be heated electrically using which heating process?
AEmission heating
BDielectric heating
CConductive heating
DInduction heating
#57📘 EE Pocket Reviewer RojasEasy
In resistance heating, which of the following materials used as the heating element will produce the highest working temperature?
ANickel copper
BNichrome
CSilicon carbide
DSilver
#58📘 EE Pocket Reviewer RojasEasy
Which of the following types of furnace suffers from pinch effect?
AVertical core type induction furnace
BCoreless induction furnace
CIndirect arc furnace
DResistance furnace
#59📘 EE Pocket Reviewer RojasEasy
Which of the following heating methods is not dependent on the frequency of supply?
AInduction heating
BResistance heating
CDielectric heating
DEddy current heating
#60📘 EE Pocket Reviewer RojasEasy
Which of the following devices is required for automatic temperature control in a furnace?
AThermocouple
BRheostat
CContactor only
DAmmeter

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