Manufacturing Engineering - 2 - Mechanical Engineering MCQ

The forging load required to transform a 1 m long 1m diameter cylindrical bloom into a square section of equal area in a hydraulic press ( 2 ) 0σ= 450 kg / cm

Which one of the following is a continuous bending process in which opposing rolls are used to produce long sections of formed shapes from coil or strip stock?

Find the time required on the shaper to complete one cut on a plate 620 mm × 880 mm, if the cutting speed is 6 m/min. the return time to cutting time ratio is 1:5 and the feed is 3 mm/stroke. The clearance at each end is 75 mm.

The maximum punch force required in punching a 30 mm diameter hole through 3 mm thick annealed aluminum alloy sheet at room temperature is (Take ultimate tensile strength of aluminum alloy as 1000 Mpa) 

For an orthogonal cutting process on mild steel, assume the following data 12
t = 0.3 mm, t = 0.85 mm, w = 2.5 mm, α= 9°, Ft = 800 N and Ft = 400 N . The ultimate shear stress τs of the work material is (N/mm²)

Which of the following forces causes power consumption in metal cutting operation?

Find chip reduction co-efficient for the following data; work place material C25 steel, tool signature 0-10-6-7-8-90-1 mm, feed 0.3 mm/rev, depth of cut is 4 mm, chip thickness is 0.48 mm.

A round rod of annealed bras 70-30 is being drawn from a diameter of 8 mm to a diameter of 4 mm at a speed of 0.8 m/s. (k = 895 MPa, n = 0.49)

Q.

The power required in this operation is

The percentage change in cutting speed required to give 60% of reduction in tool life (n = 0.3) is

While machining at 1 m/s, the tool life noted was 120 min. If a similar tool cuts at 25% higher speed, the tool life will be (Take n = 0.32 in the Taylor’s tool life equation)

The market price of a machine is Rs. 8000 and the discount allowed to distributors is 20% of the market price. For a certain period, it was found that the selling cost was half the factory cost. The material cost, labor cost, and overhead charges of the factory are in the ratio 1:3:2. If the material cost is Rs. 400, then the profit made by the factory on each machine is

The following part program is used for producing semi circular arc of radius 5 units.
N01 G00 G90 × 5.0 Y5.0 F500 L_F
N05 G02 × 5.0 y – 5.0L_F

The center of the arc is

Crate wear starts at some distance from the tool tip because

A 38 mm H.S.S drill is used to drill a hole in a cast iron block 150 mm thick at a cutting speed 30 m/min and feed 0.8 mm/rev. If the over travel of drill is 6 mm and approach 12 mm, the time required to drill the hole is

Consider casing of metal having density 8 × 10_-2 N/cc with vertical core having density 2 × 10^-2 N/cc and size (all dimensions are in cm) as shown below. The net upward force acting on the core is _________ N.

Match List-I with List-II and select the correct answer using the codes given below the lists:

List – I (Moulding)

1. Shell moulding

2. Slush moulding

3. Centrifugal casting

4. Dry sand moulding

List – II (product)

(a) Rain water pipe

(b) Machine tool bed

(c) Cylinder block

(d) Turbine blade

(e) Hollow blade

Match List-I with List-II and select the correct answer using the codes given below the lists:

List–I (manufacturing process)

(a) Finish turning

(b) Forming

(c) Thread cutting

(d) Down milling

List–II (Conditions)

1. Back lash eliminator

2. Zero rate

3. Nose radiusing

4. Low speed