Q. Above ________ temperature, working of metals is named hot working.
(A) Recrystallization
(B) Critical
(C) Melting
(D) None of the above
Q. The mechanical property desired for successful forging is
(A) Ductility
(B) Malleability
(C) Hardness
(D) Toughness
Q. The reason behind metal flow in drawing operation is
(A) Ductility
(B) Shearing
(C) Plasticity
(D) Toughness
Q. Which of the following does not need additional finishing process
(A) Hot rolling
(B) Hot forging
(C) Cold rolling
(D) All of the above
Q. Seamless tubes in mass production are manufactured by
(A) Drawing
(B) Extrusion
(C) Rolling
(D) Casting.
Q. In drop forging, forging is done by dropping
(A) The work piece at high velocity
(B) The hammer at high velocity
(C) The die with hammer with high velocity
(D) A weight on hammer to produce the requisite impact
Q. The process extensively used to make bolts and nuts is
(A) Hot piercing
(B) Extrusion
(C) Cold peening
(D) Cold heading
Q. Which of the following methods is used for the manufacturing of collapsible tooth-paste tubes
(A) Impact extrusion
(B) Direct extrusion
(C) Deep drawing
(D) piercing
Q. Structural sections such as rails, angles, I-beams are made by ______.
(A) Hot rolling
(B) Drawing
(C) Extrusion
(D) piercing
Q. In four high rolling mill, there are four rolls out of which
(A) one is working roll and three are backing up rolls.
(B) Two are working roll and two are backing up rolls.
(C) Three are working roll and one is backing up roll.
(D) All of the four are working rolls.
Q. In which process, the ram and billet travel in opposite direction.
(A) Hydrostatic extrusion
(B) Direct extrusion
(C) Indirect extrusion
(D) Explosive extrusion
Q. The cold working in which hardness of work is increased is called
(A) Work hardening
(B) Age hardening
(C) Flame hardening
(D) None of the above
Q. Which of the following materials can not be forged
(A) Wrought iron
(B) Cast iron
(C) Mild steel
(D) High carbon steel
Q. Which metal forming process is used for manufacturing of long steel wire
(A) Rolling
(B) Drawing
(C) Forging
(D) Extrusion
Q. Tandem drawing of wires and tubes is necessary because
(A) it is not possible to reduce at one stage
(B) annealing is needed between stages
(C) accuracy in dimension is not possible otherwise
(D) surface finish improves after drawing stage
Q. In order to get uniform thickness of the plate by rolling process, one provides
(A) camber on the rolls
(B) offset on the rolls
(C) hardening of rolls
(D) antifriction bearing
Q. In blanking operation, the clearance is provided on
(A) Punch
(B) Die
(C) Half on punch and half on die
(D) All of the above
Q. Dies for wire drawing are made of
(A) Cast steel
(B) Cast iron
(C) Carbide
(D) Wrought iron
Q. Which of the following is not a rolling defect?
(A) Waviness
(B) Alligatoring
(C) Cracks
(D) Blow Holes
Q. The hot working of metals is carried out
(A) at the recrystallisation temperature
(B) below the recrystallisation temperature
(C) above the recrystallisation temperature
(D) at any temperature
Q. In four high rolling mill, the diameter of backing up rolls is ______the diameter of working rolls.
(A) equal to
(B) smaller than
(C) larger than
(D) All of the above
Q. The process of increasing cross-section of a bar at the expense of its length is called
(A) hot piercing
(B) extrusion
(C) drawing down
(D) upsetting
Q. The process of decreasing cross-section of a bar and increasing its length is called
(A) drawing down
(B) upsetting
(C) spinning
(D) peening
Q. blanking and punching operations can be performed simultaneously on
(A) compound die
(B) combination die
(C) progressive die
(D) simple die