Q1:

A hole of 30 mm diameter is to be produced by reaming. The minimum diameter permissible is 30.00 mm while the maximum diameter permissible is 30.05 mm. In this regard, consider the following statements about the reamer size:

1. The minimum diameter of the reamer can be less than 30 mm.

2. The minimum diameter of the reamer cannot be less than 30 mm.

3. The maximum diameter of the reamer can be more than 30.05 mm.

4. The maximum diameter of the reamer must be less than 30.05 mm.

Of these statements

Q2:

Match List I (Operation) with List II (Application) and select the correct answer using the codes given below the lists:

List-I (Operation)		List-II (Application)
(A)	Reaming	(1)	Used for enlarging the end of a hole to give it a conical shape for a short distance
(B)	Boring	(2)	Used for enlarging only a limited portion of the hole
(C)	Counter boring	(3)	Used for finishing a hole
(D)	Counter sinking	(4)	Used for enlarging a hole

Q3:

Shell reamers are mounted on

Q4:

The main purpose of chaplets is

Q5:

Which of the following methods are used for obtaining directional solidification for riser design

1. Suitable placement of chills

2. Suitable placement of chaplets

3. Employing padding

Select the correct answer.

Q6:

Which one of the following is the correct statement? Gate is provided in moulds to

Q7:

Match the items in Column I and Column II.

Column – I		Column – II
A	Metallic Chills	1	Support for the core
B	Metallic Chaplets	2	Reservoir of the molten metal
C	Riser	3	Control cooling of critical sections
D	Exothermic Padding	4	Progressive solidification

 

Q8:

In a green-sand moulding process, uniform ramming leads to

Q9:

Green sand mould indicates that

Q10:

Which one of the following materials will require the largest size of riser for the same size of casting?

Q11:

Which of the following materials requires the largest shrinkage allowance, while making a pattern for casting?

Q12:

In solidification of metal during casting, compensation for solid contraction is

Q13:

If the melting ratio of a cupola is 10:1,then the coke requirement for one ton melt will be

Q14:

Gray cast iron blocks 200 × 100 × 10 mm are to be casted  into  sand moulds. Shrinkage allowance for pattern making is 1%. The ratio of the volume of pattern to that of the casting will be

Q15:

The advantage of the welding process is

Q16:

Assertion (A): It is generally difficult to weld Aluminum parts by normal arc welding process.

Reason (R): Hard and brittle Aluminum-oxide film is formed at the welded joints.

Q17:

Assertion (A): Aluminium has poor weldability.

Reason (R): Aluminium has high thermal conductivity and high affinity to oxygen.

Q18:

Consider the following statements.

Cast iron is difficult to weld, because of

1. Low ductility

2. Poor fusion

3. Tendency to crack on cooling

Which of these statements are correct?

Q19:

Fabrication weldability test is used to determine

Q20:

Consider the following statements regarding welded joints:

1. It is a permanent type of joint.

2. It is reliable and economical for pressure vessel construction.

3. It is free from fabricational residual stresses.

4. Such joints are suitable for static loading only.

5. Welding is a versatile and flexible metal joining process.

Which of the above statements are correct?

Q21:

The ratio between Oxygen and Acetylene gases for neutral flame in gas welding is

Q22:

Cutting power consumption in turning can be significantly reduced by

Q23:

Which one of the following statement is NOT correct with reference to the purposes and effects of rake angle of a cutting tool?

Q24:

Brittle materials are machined with tools having zero or negative rake angle because it.

Q25:

Which one of the following statements is correct about an oblique cutting?