1. The metal patterns as compared to wooden patterns require less ?

shrinkage allowance

machining allowance

draft allowance

distortion allowance

Answer: draft allowance

Explanation:


2. Cores are used to ?

form internal cavities in the casting

improve mould surface

form a part of a green sand mould

all of these

Answer: all of these

Explanation:


3. The binder commonly used in making oil sand, is ?

clay-type binder

organic-type binder

inorganic-type binder

any one of these

Answer: organic-type binder

Explanation:


4. The process extensively used for making bolts and nuts is ?

hot piercing

extrusion

cold peening

cold heading

Answer: cold heading

Explanation:


5. A basic shaft is one whose ?

lower deviation is zero

upper deviation is zero

lower and upper deviations are zero

none of these

Answer: upper deviation is zero

Explanation:


6. Blanking and piercing operations can be performed simultaneously in a ?

simple die

progressive die

compound die

combination die

Answer: compound die

Explanation:


7. In order to ram the sand harder at the back of the mould and softer on the pattern face, a ........... is used ?

sand slinger

squeezing machine

jolt machine

stripper plate machine

Answer: squeezing machine

Explanation:


8. In order to get uniform thickness of the plate by rolling process, one provides ?

camber on the rolls

offset on the rolls

hardening of the rolls

antifriction bearings

Answer: hardening of the rolls

Explanation:


9. In a hot chamber die casting machine ?

ferrous alloys with low melting temperature are casted

ferrous alloys with high melting temperature are casted

non-ferrous alloys with low melting temperature are casted

non-ferrous alloys with high melting temperature are casted

Answer: non-ferrous alloys with low melting temperature are casted

Explanation:


10. In a ........... both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram ?

simple die

progressive die

combination die

compound die

Answer: combination die

Explanation: