Maximum pitch of rivets, used in steel stacks, is limited to (where t is thickness of thinner plate being connected)

Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole and $${\sigma _{\text{t}}}$$ = Permissible tensile stress for plate material)

A

$${\text{pd}}{\sigma _{\text{t}}}$$

B

$${\text{pt}}{\sigma _{\text{t}}}$$

C

$$\left( {{\text{p}} - {\text{d}}} \right){\sigma _{\text{t}}}$$

D

$$\left( {{\text{p}} - {\text{d}}} \right){\text{t}}{\sigma _{\text{t}}}$$

The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates and $${\sigma _{\text{t}}},\,\tau $$ and $${\sigma _{\text{c}}}$$ = Permissible tensile, shearing and crushing stresses respectively)

A

$$\left( {{\text{p}} - 2{\text{d}}} \right){\text{t}} \times {\sigma _{\text{c}}}$$

B

$$\left( {{\text{p}} - {\text{d}}} \right){\text{t}} \times \tau $$

C

$$\left( {{\text{p}} - {\text{d}}} \right){\text{t}} \times {\sigma _{\text{t}}}$$

D

$$\left( {2{\text{p}} - {\text{d}}} \right){\text{t}} \times {\sigma _{\text{t}}}$$

If the rivets in adjacent rows are staggered and the outermost row has only one rivets, the arrangement of the rivets is called

A

Chain riveting

B

Zigzag riveting

C

Diamond riveting

D

Crisscross riveting

According to IS Specifications, the maximum pitch of rivets in compression is (where t is thickness of thinnest outside plate or angle)

A

Lesser of 200 mm and 12t

B

Lesser of 200 mm and 16t

C

Lesser of 300 mm and 32t

D

Lesser of 300 mm and 24t

P is heaver then B. R is thinner then A. P is thinner then R. Who is the heaviest.

A

B

P

C

A

D

R

P is heavier than B. R is thinner than A. P is thinner than R. Who is the heaviest?

A

B

P

C

A

D

R

R is thinner than P. Q is heavier than S. S is heavier than T. P is thinner than S. Who is the thinnest?

A

P

B

Q

C

R

D

S

R is thinner than P. Q is heavier than S. S is heavier than T. P is thinner than S. Who is the thinnest”

A

P

B

Q

C

R

D

S

A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

A

There are four rivets per pitch length, all in double shear

B

There are four rivets per pitch length, out of which two are in single shear and two are in double shear

C

There are five rivets per pitch length, all in double shear

D

There are five rivets per pitch length, out of which four are in double shear and one is in single shear

According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

A

$$\frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$

B

$$1.875 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$

C

$$2 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$

D

$$3 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$

Maximum pitch of rivets, used in steel stacks, is limited to (where t is thickness of thinner plate being connected)

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