# The shear strength of a sheet metal is 300MPa. The blanking force required to produce a blank of 100mm diameter from a 1.54 mm thick sheet is close to

1.  45kN

2.  70kN

3.  141kN

4.  3500kN

4

141kN

Explanation :
No Explanation available for this question

# Calculate the smallest punch diameter that can be designed for piercing sheet metal strip with the following data. Crushing strength of the punch material is 500Mpa. Thickness of the sheet is 2mm, factor of safety is 3, and shear strength of the sheet material 500Mpa is

1.  2mm

2.  6mm

3.  8mm

4.  24mm

4

8mm

Explanation :
No Explanation available for this question

# A hemispherical cup of radius ‘R’ is formed in a press working operation. The radius of blank would be

1.  √2 R

2.  √3 R

3.  √2/3 R

4.  √3/2 R

4

√2 R

Explanation :
No Explanation available for this question

# Calculate the punch size in mm, for a circular blanking operation for which details are given below. Size of the blank 25mm Thickness of the sheet 2mm Redial clearance between punch and die 0.06mm, Die allowance 0.05mm

1.  24.83

2.  24.89

3.  25.01

4.  25.17

4

24.83

Explanation :
No Explanation available for this question

# The hole 40+0.020+0.000 & shaft, 40+0.010+0.010 when assembled will result in

1.  clearance fit

2.  Interference fit

3.  transition fit

4.  drive fit

4

transition fit

Explanation :
No Explanation available for this question

# In an engineering drawing one finds the designation of 20G7f8. The position of tolerance of the hole is indicated by

1.  Letter G

2.  Letter f

3.  Number 7

4.  Number 8

4

Letter G

Explanation :
No Explanation available for this question

# Appropriate instrument to check the flatness of slip gage is

1.  dial indicator

2.  Pneumatic comparator

3.  Optical interferometer

4.  Tool makes microscope with projection facility

4

Optical interferometer

Explanation :
No Explanation available for this question

# A hole is of dimension Φ9+0 +0.015mm. The corresponding shaft is of dimension Φ9+0.001 +0.010mm. The resulting assembly has

1.  loose running fit

2.  close running fit

3.  transition fit

4.  interference fit

4

transition fit

Explanation :
No Explanation available for this question

# Flatness of slip gages is checked with

1.  Interferometer

2.  Optical flat

3.  Electronic comparator

4.  Linear measuring machine

4

Interferometer

Explanation :
No Explanation available for this question

# For angle measurement in metrology, the following pair can be used in conjunction with each other

1.  sine bar and vernier calipers

2.  bevel protractor and slip gages

3.  slip gages and sine bar

4.  sine bar and bevel protractor

4