Q.1
Which of the following furnace suffers from pinch effect?
  • resistance furnace
  • core type induction furnace
  • coreless induction furnace
  • vertical core type induction furnac
Q.2
How are different forms of energy related?
  • they can all be transformed into other forms of energy
  • none of them can be transformed into other forms of energy
  • they can be created
  • they can be destroyed
Q.3
Which of the following causes the corrosion of terminals and clamps?
  • spilled electrolyte
  • increase in temperature
  • decrease in pressure
  • due to high current
Q.4
Which of the following methods of heating is not dependent on the frequency of supply?
  • induction heating
  • dielectric heating
  • electric resistance heating
  • all of the above
Q.5
Which of the following is an advantages of heating by electricity?
  • quicker operation
  • higher efficiency
  • absence of flue gases
  • all of the above
Q.6
As an object falls its __________ energy decreases and its kinetic energy increases
  • potential
  • chemical
  • thermal
  • electric
Q.7
What is an example of multiple energy transformations?
  • Your body transforms chemical to thermal
  • Your body transforms chemical to mechanical
  • a flashlight converts chemical energy in batteries to electrical to electromagnetic energy in light
  • a phone converts electrical to electromagnetic
Q.8
Whenever a moving object experiences friction, some of its kinetic energy is transformed into __________ energy.
  • thermal
  • electrical
  • nuclear
  • mechanical
Q.9
_________ CANNOT be created or destroyed
  • energy
  • transformation
  • motion
  • pendulums
Q.10
A change from one form of energy to another
  • energy conservation
  • energy transformation
  • potential energy
  • kinetic energy
Q.11
A pendulum has the most kinetic energy when?
  • at the top of its swing
  • at the bottom of its swing
Q.12
Grounding transformer is used where neutral .........available
  • is
  • is not
  • either a or b
  • . none of the above
Q.13
In equipment grounding, the enclosure is connected to ...........wire
  • ground
  • neutral
  • phase
  • either a or b
Q.14
In case of earth fault, the underground neutral system                    lead to arcing ground
  • does
  • does not
  • any of above
  • none of above
Q.15
In a substation the equipment used to limit short circuit current level is
  • series reactor
  • coupling capacitor
  • lightening switch
  • isolator.
Q.16
Grounding transformer is used where neutral                  available
  • is
  • is not
  • any of above
  • none of above
Q.17
In electric welding, arc blow can be avoided by
  • using bare electrodes
  • welding away from earth ground connection
  • using welding machines
  • increasing arc length
Q.18
A.C. welding machine cannot be used for welding
  • mig
  • atomic hydrogen
  • resistance
  • submerged ar
Q.19
The major disadvantage of carbon arc welding is that
  • there is occurrence of blow holes
  • electrodes are consumed fast
  • separate filler rod is needed
  • bare electrodes are necessary.
Q.20
The free-running speed of a train does NOT depend on the
  • duration of stops
  • distance between stops
  • running time
  • acceleration.
0 h : 0 m : 1 s