Manufacturing Technology (3151912) MCQs

MCQs of Foundary Technology

Showing 81 to 90 out of 125 Questions
6 7 8 9 10 11
81.

The purpose of sprue is to

(a)

Feed the casting at a rate consistent with the rate of solidification
(b)

Act as a reservoir for molten metal
(c)

 Help feed the casting until all solidification takes place
(d)

Feed molten metal from pouring basin to gate
Answer:

Option (d)

82.

"The mould for casting ferrous materials in continuous casting process is made of"

(a)

Low carbon steel
(b)

Medium carbon steel
(c)

High carbon steel
(d)

Copper 
Answer:

Option (d)

83.

The purpose of pouring basin is to

(a)

Feed the casting at a rate consistent with the rate of solidification
(b)

Act as a reservoir for molten metal 
(c)

Help feed the casting until all solidification takes place
(d)

Feed molten metal from pouring basin to gate

 
Answer:

Option (b)

84.

Sprue in casting refers to

(a)

Gate
(b)

Vertical passage 
(c)

Riser
(d)

Horizontal passage
Answer:

Option (b)

85.

A sprue hole is

(a)

A tool used in mould repairing
(b)

An opening in mould for pouring molten metal 
(c)

A blind hole in jigs
(d)

 An eccentric hole in dies for clamping
Answer:

Option (b)

86.

Crucible furnace is used for melting of

(a)

Cast iron      
(b)

Copper base alloys
(c)

Ferrous metal
(d)

Non ferrous metal
Answer:

Option (d)

87.

The pouring temperature for grey cast iron is

(a)

 1000  ̊C
(b)

1250  ̊C
(c)

 1400  ̊C
(d)

 800  ̊C
Answer:

Option (c)

88.

Semi-centrifugal casting.......

(a)

Is used to ensure purity and density at extremities of a casting
(b)

Is used to cast symmetrical objects
(c)

Is used to obtain high density and pure casting
(d)

Uses heavy cast iron mould to act as chill
Answer:

Option (a)

89.

In slush casting process.........

(a)

Molten metal is fed into the cavity in metallic mould by gravity
(b)

Metal is poured into die cavity,and after a predeterminded time the mould is inverted to permit a part of metal still in molten state to flow out of cavity
(c)

Cavity is filled with a precalculated quantity of metal and a core or plunger is inserted to force the metal into cavity
(d)

Metal is forced into mould under high pressure
Answer:

Option (b)

90.

In slush casting.......

(a)

Consumable patterns are used
(b)

Plunger is used to force molten metal to fill up cavities
(c)

Vaccum is applied to facilitate complete filling of casting
(d)

When a solid shell of sufficient thickness has formed, remaining liquid is poured out
Answer:

Option (d)

Showing 81 to 90 out of 125 Questions
6 7 8 9 10 11