T2 Part 6 Flashcards
How would you fix a spacer bar saddle to a masonry wall?
Plastic Plug and Screw
In a building with a three phase four wire supply, single phase loads are got by
Using any one phase and neutral.
With reference to fuses the letters HRC mean:
High Rupturing capacity
The white light coming from a fluorescent tube is caused by:
The coating of powder inside the tube.
Why is a small capacitor fitted across the contacts in the starter of a
fluorescent fitting?
Radio interference suppression.
Stroboscopic effect means:
Rotating machines appear stopped or moving slowly.
In a large workshop which of the following will overcome stroboscopic effect?
Install all fluorescents over three phases.
Cable tray is used to
To provide runs for sheathed cables.
For NYM-J cable the J indicates
Earth wire with green and yellow insulation.
What is the maximum Volt drop allowed on a 230V circuit?
9.2 V
Volt drop may be reduced in a cable by:
Reducing the length and increasing the CSA.
The colour of a 115V plug and socket is
Yellow
In a three phase caged rotor induction motor the rotating magnetic field is achieved by:
Energising the stator coils from a three phase supply
On a capacitor start motor the function of the centrifugal switch is
To switch out the capacitive start winding when the motor is near full speed.
What type of contact is used as a stop command in a motor control
circuit?
N.C.
