RIGGING SYSTEMS
WHAT WAS THE EARLIEST FORM OF RIGGING SYSTEM?
ROPE SET. REMEMBER NO COUNTERWEIGHT, JUST PURE MUSCLE WORK.
WHAT IS THE MOST PROHIBITIVE ASPECT OF DOMESTICALLY MANUFACTURED RIGGING HARDWARE?
COST
WHAT ARE THE PARTS OF THE PATH ELECTRICITY TRAVELS?
SOURCE – THE ORIGIN OF THE ELECTRIC POTENTIAL
LOAD – THE DEVICE THAT CONVERTS ELECTRICAL ENERGY TO ANOTHER FORM OF ENERGY
CIRCUIT – THE PATH THE ELECTRICITY TRAVELS BETWEEN THE TWO
WHAT IS THE EFFICIENCY OF A TERMINATION USING WIRE ROPE TERMINATION?
80%
WHAT IS OHM'S LAW?
WHEN MEASURING THE CURRENT THROUGH A CIRCUIT, AS RESISTANCE INCREASES, CURRENT DECREASES, AND AS RESISTANCE DECREASES, CURRENT INCREASES.
IN TERMS OF WEIGHT DISTRIBUTION, MOVEMENT, AND USAGE, DESCRIBE A SINGLE PURCHASE COUNTERWEIGHT SYSTEM.
WEIGHT DISTRIBUTION = 1:1. 1LBS ON THE BATTEN=1LBS ON THE ARBOR.
MOVEMENT = 1:1. 1'-0" OF BATTEN MOVEMENT=1'-0" OF ARBOR MOVEMENT
USED WHEN THERE IS NOTHING OBSTRUCTING THE RUN OF THE ARBOR FROM FLOOR TO GRID.
WHAT THREE THINGS SHOULD BE STAMPED ON A PIECE OF RIGGING HARDWARE IF IT IS RATED FOR OVERHEAD USE?
WORKING LOAD LIMIT, MANUFACTURER'S NAME, PIC (PRODUCT IDENTIFICATION CODE)
ENVELOPE
FILAMENT
BASE
GASEOUS ENVIRONMENT
WHAT IS A BIGHT?
THE BEND IN A WIRE ROPE MADE WHEN TERMINATING AN END.
WHAT'S THICKER: 18 GAUGE WIRE OR 12 GAUGE WIRE?
12 GAUGE WIRE
IN TERMS OF WEIGHT DISTRIBUTION, MOVEMENT, AND USAGE, DESCRIBE A DOUBLE PURCHASE COUNTERWEIGHT RIGGING SYSTEM.
WEIGHT DISTRIBUTION: 1:2. 1LBS ON THE BATTEN=2LBS ON THE ARBOR.
MOVEMENT: 2:1. 2'-0" OF BATTEN MOVEMENT=1'-0" OF ARBOR MOVEMENT.
USED WHEN THERE IS SOMETHING OBSTRUCTING THE FULL RUN OF THE ARBOR FROM FLOOR TO GRID.
7 STRANDS EACH MADE UP OF 19 INDIVIDUAL WIRES.
WHAT IS THE WEST VIRGINIA FORMULA?
W=VA
W=POWER IN WATTS
V=VOLTAGE IN VOLTS
A=CURRENT IN AMPS
WHAT DOES A THIMBLE DO AND WHY IS IT IMPORTANT TO USE WHEN TERMINATING A WIRE ROPE?
IT PROTECTS THE BIGHT OF A WIRE ROPE PREVENTING KINKS, WHICH REDUCE THE WORKING LOAD LIMIT OF THE WIRE ROPE.
WHAT IS MEANT BY THE PHRASE, "NEVER SADDLE A DEAD HORSE?"
WHEN INSTALLING WIRE ROPE CLAMPS, THE SADDLE PORTION IS PLACED ON THE "LIVE" OR "LOAD-BEARING" WIRE ROPE, AND THE U-BOLT PORTION IS PLACED AROUND THE "DEAD" OR "NON-LOAD BEARING" END OF THE WIRE ROPE.
WHAT COMPONENT OF THE RIGGING SYSTEM REDIRECTS THE LIFT LINES FROM OVER THE STAGE AND DOWN TO THE OPERATOR?
THE HEAD BLOCK.
WHAT IS THE EFFICIENCY OF A SWAGED (OR NICOPRESSED) WIRE ROPE TERMINATION?
100%
WHAT UNIQUE PROPERTY DOES A TUNGSTEN-HALOGEN LAMP HAVE THAT MAKES IT LAST LONGER THAN OTHER INCANDESCENT LAMPS?
INSTEAD OF AN INERT GAS, TUNGSTEN-HALOGEN HAS A HALOGEN GAS WHICH REACTS WITH THE PARTICLES OF TUNGSTEN THAT BREAK OFF AS THE FILAMENT BURNS TO FORM A COMPOUND. THE COMPOUND IS ATTRACTED TO THE FILAMENT, REDEPOSITING THE TUNGSTEN PARTICLES ON THE FILAMENT ESSENTIALLY REBUILDING THE FILAMENT AS IT BURNS.
WHAT IS ULTIMATE LOAD?
THE ABSOLUTE MAXIMUM LOAD THAT PIECE CAN BEAR. ANYMORE AND IT WILL BREAK.
WHAT IS THE EASIEST AND SAFEST WAY TO CHECK TO SEE IF A LINE-SET IS OUT OF WEIGHT?
FEEL THE TENSION IN THE OPERATING LINE. GOLDILOCKS SITUATION. NOT TOO TIGHT AND NOT TOO LOOSE.
WHAT COMPONENT OF THE RIGGING SYSTEM THAT REDIRECTS THE LIFT LINES FROM THE BATTEN TO THE HEAD BLOCK?
THE LOFT BLOCK.
IN TERMS OF MANUFACTURING PROCESS, ADVANTAGES AND DISADVANTAGES, WHAT IS THE DIFFERENCE BETWEEN MALLEABLE (CAST) STEEL AND FORGED STEEL?
MALLEABLE STEEL IS CAST FROM MOLTEN METAL AND FORGED STEEL IS HEATED THEN BEATEN INTO SHAPE.
MALLEABLE STEEL IS CHEAP AND READILY AVAILABLE, BUT IS PRONE TO DEFECTS THAT CANNOT BE VISUALLY DETECTED, SUCH AS SHRINKAGE OR AIR POCKETS.
FORGED STEEL IS EXTREMELY STRONG AND WILL NOT HAVE THE DEFECTS ASSOCIATED WITH MALLEABLE STEEL, BUT IT IS SIGNIFICANTLY MORE EXPENSIVE.
HOW MANY 750W LIGHTING INSTRUMENTS CAN SAFELY BE RAN AT FULL BY 2400W DIMMER?
3
2400/750=3.2
IF A SHACKLE'S WLL IS 1 TON, AND THE MANUFACTURER STATES THEY MAINTAIN A SAFETY FACTOR OF 5, WHAT IS THE SHACKLES ULL?
EXPLAIN WHY YOU SHOULD NEVER TOUCH THE ENVELOPE OF A THEATRICAL LAMP?
YOUR FINGERS WILL LEAVE AN OILY RESIDUE ON THE ENVELOPE WHICH WILL ACT AS AN INSULATOR CAUSING THE ENVELOPE TO HEAT UNEVENLY WHICH CAN LEAD TO CRACKING/SHATTERING WHEN HEATED.