Question

The following trails were conducted in slush casting process:

The time needed to invert the mould for getting 6mm thickness of casting is

• A. 3.9 sec
• B. 248.43 sec
• C. 183.57 sec
• D. 232.43 sec

Answer 1

The correct option is D 232.43 sec

Slush casting process:

Test 1: $T_1=60sec,t_1=2.5mm$

Test 2: $T_2=120sec,t_2=4.0mm$

Test 3: $T_3=?,t_3=6.0mm$

Thickness of casting produced in such casting process is given by

$t_1=C_1\sqrt{T}+C_2---\left(1\right)t_2=C_1\sqrt{T}+C_2---\left(2\right)2.5=C_1\sqrt{60}+C_2\underset{–}{4.0=C_2\sqrt{120}+C_2}{C}_1=0.4675,C_2=-1.1213t_1=0.4675\sqrt{T}-1.12136=0.4675\sqrt{T}-1.1213T=232Sec$