Millwright Red Seal Exam Latest Update Actual Questions and Answers with complete solutions

Millwright Red Seal
BRITTLENESS - CORRECT ANSWER-IS THE PROPERTY OF A METAL WHICH
PERMITS NO PERMANENT DISTORTION BEFORE BREAKING.

DUCTILITY - CORRECT ANSWER-: IS THE ABILITY OF THE METAL TO BE
PERMANENTLY DEFORMED WITHOUT BREAKING. METALS
SUCH AS MACHINE ( MILD ) STEEL, WHICH MAY BE DRAWN INTO WIRE IS A
DUCTILE MATERIAL.

ELASTICITY - CORRECT ANSWER-: IS THE ABILITY OF A METAL TO RETURN TO
ITS ORIGINAL SHAPE AFTER ANY FORCE, ACTING
UPON IT, HAS BEEN REMOVED. PROPERLY HEAT-TREATED SPRINGS ARE
GOOD EXAMPLES OF ELASTIC
MATERIALS.

HARDNESS: - CORRECT ANSWER-: MAY BE DEFINED AS THE RESISTENCE TO
FORCEABLE PENETRATION OR PLASTIC DEFORMATION.

MALLEABILTY: - CORRECT ANSWER-IS THAT PROPERTY OF A METAL, WHICH
PERMITS IT TO BE HAMMERED OR ROLLED INTO OTHER
SIZES AND SHAPES.

TENSILE STRENGTH: - CORRECT ANSWER-IS THE MAXIMUM AMOUNT OF PULL
THAT A MATERIAL WILL WITHSTAND BEFORE
BREAKING. IT IS EXPRESSED AS THE NUMBER OF POUNDS PER SQUARE INCH
OF PULL THAT IS REQUIRED TO
BREAK A BAR HAVING A CROSS SECTION OF ONE SQUARE INCH

TOUGHNES: - CORRECT ANSWER-IS THE PROPERTY OF A METAL TO
WITHSTAND IMPACT OR SHOCK.
ANNEALING -ANNEALING CONSISTS OF HEATING STEEL TO ABOVE ITS
CRITICAL RANGE AND THEN ALLOWING IT TO COOL SLOWLY.

NORMALIZING - CORRECT ANSWER-: IT CONSISTS OF HEATING SOMEWHAT
ABOVE CRITICAL THE RANGE, FOLLOWED BY AIR-COOLING.

HARDENING: - CORRECT ANSWER-IS ACOMPLISHED BY HEATING THE STEEL
BEYOND THE CRITICAL TEMPERATURE AND FOLLOWING BY RELATIVELY
FAST COOLING. IF HEATING FOR HARDENING IS BEING ACCOMPLISHED IN
THE FORGE FIRE THE COLOR SHOULD BE A FULL RED AND TO CHECK ON THE
TEMPERATURE A MAGNET MAY BE USED, AS THE STEEL AT OR ABOVE THE
CRITICAL TEMPERATURE SHOULD BE NON-MAGNETIC. IF THE MAGNET IS
BEING USED WHILE THE TEMPERATURE IS BEING RAISED FROM THE ROOM

, TEMPERATURE, THE CORRECT POINT TO STOP HEATING IS WHERE THE
STEEL NO LONGER RESPONDS TO THE PULL OF THE MAGNET. IF A FURNACE
IS BEING USED TO HEAT THE STEEL TO THE HARDENING HEAT A PYROMETER
AIDS GREATLY IN DETERMINING THE CRITICAL TEMPERATURE.

TEMPERING: - CORRECT ANSWER-TEMPERING IS THE APPLICATION OF HEAT
AFTER HARDENING. THE PURPOSE IS TO RELIEVE SOME OFTHE HARDENING
STRAINS AND ALSO TO SOFTEN THE STEEL. TEMPERING IS ACCOMPLISHED
BY HEATING TO
SOME PREDETERMINED TEMPERATURE AND FOLLOWED BY ANY RATE OF
COOLING.

. WHAT IS MEANT BY A PLAIN CARBON STEEL - CORRECT ANSWER-.---STEEL
WHICH CONTAINS ONLY CARBON AND NO OTHER MAJOR ALLOY ELEMENT

WHAT IS MEANT BY AN ALLOY STEEL - CORRECT ANSWER-.---A CARBON
STEEL TO WHICH ONE OR MORE ELEMENTS ARE ADDED

DEFINE HEAT TREATMENT - CORRECT ANSWER-.---THE HEATING AND
COOLING OF STEEL TO GIVE IT SPECIFIC DESIRABLE QUALITIES

MAGANESE IS BOTH ESSENTIAL AND A RESPECTED ELEMENT IN STEEL AND
IS SOMETIMES
CALLED - CORRECT ANSWER-.---THE " TOUGHENER

. SCRAP STEEL, LIMESTONE AND MOLTEN PIG IRON ARE THE BASIC CHARGE
FOR - CORRECT ANSWER--OPEN HEARTH FURNACE

THE PRINCIPLE ALLOYING ELEMENTS CONTAINED IN STAINLESS STEEL ARE -
CORRECT ANSWER--CHROMIUM AND NICKEL

THE AMOUNT OF CARBON IN A PLAIN CARBON STEEL DETERMINES THAT
STEEL'S - CORRECT ANSWER-.---HARDNESS

S. A. E. 1020 STEEL CONTAINS APPROXIMATELY - CORRECT ANSWER-.---.20%
CARBON ( 0.18 - 0.23 )

BEFORE A CARBON STEEL IS CONSIDERED HARDENABLE BY HEATING AND
QUENCHING
ALONE, IT SHOULD CONTAIN A MINIMUM OF - CORRECT ANSWER-.---0.35%
CARBON

10. WHAT IS MEANT BY ANNEALING - CORRECT ANSWER-.---HEATING STEEL
TO ABOVE ITS CRITICAL RANGE AND THEN ALLOWING IT TO COOL SLOWLY.