426. An expendable pattern is used in

1. 1. slush casting

   
   
   

   2. squeeze casting

   
   
   

   3. centrifugal casting

   
   
   

   4. Investment casting

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Expendable pattern is used in Investment casting.

   Correct Option: C

   Expendable pattern is used in Investment casting.

---

427. Match the items of List-I (Equipment) with the items of List-II (Process) the correct answer using the given codes.
     Equipment
     P. Hot chamber machine
     Q. Muller
     R. Dielectric baker
     S. Sand blaster
     Process
     1, Cleaning
     2. Core making
     3, Die casting
     4. Annealing and mixing

1. 1. P-2, Q-1, R-4, S-6

   
   
   

   2. P-4, Q-2, R-3, S-5

   
   
   

   3. P-4, Q-5, R-1, S-2

   
   
   

   4. P-3, Q-5, R-2, S-1

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

---

428. The primary purpose of sprue in casting mould is to

1. 1. feed the casting at rate consistent with the rate of solidification

   
   
   

   2. Act as a reservoir for molten metal

   
   
   

   3. feed molten metal from the pouring basin to the gate

   
   
   

   4. help feed the casting until all solidification takes place

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

---

429. In centrifugal casting, the lighter impurities are

1. 1. uniformly distributed

   
   
   

   2. forced towards the outer surface

   
   
   

   3. trapped near the mean radius of the casting

   
   
   

   4. collected at the centre of the casting

   
   
   

---

1. View Hint View Answer Discuss in Forum

   At the inner surface of the casting.

   Correct Option: C

   At the inner surface of the casting.

---

---

430. Shrinkage allowance on pattern is provided to compensate for shrinkage when

1. 1. the temperature of liquid metal drops from pouring to freezing temp

   
   
   

   2. the metal changes from liquid to solid state at freezing temperature

   
   
   

   3. the temperature of solid phase drops from freezing to room temperature

   
   
   

   4. the temp of metal drops from pouring to room temperature

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Liquid shrinkage is compensated by riser.

   Correct Option: D

   Liquid shrinkage is compensated by riser.

---