Thickness of the plates to be joined and the type of joint decides the _______ of the rivet needed.

Six persons - Akshay, Bobby, Celina, Dimple, Esha, and Faisal took up a job with XYZ Consultants in a week from Monday to Saturday. Each of them joined for different posts on different days. The posts were of-Clerk, Officer, Technician, Manager, Supervisor and Sales Executive though not in the same order. Faisal joined as a Manager on the first day. Bobby joined as a Supervisor but neither on Wednesday nor Friday. Dimple joined as a Technician on Thursday. The officer joined the firm on Wednesday. Esha joined as a clerk on Tuesday. Akshay joined as a Sales Executive. Who joined the firm on Wednesday?

A

Celina

B

Esha

C

Data inadequate

D

Bobby

When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)

A

Is at the maximum distance from CG of the rivet group

B

Is at the minimum distance from CG of the rivet group

C

Gives the maximum angle between the two forces Fa and Fm

D

Gives the minimum angle between the two forces Fa and Fm

Which of the following assumptions are made in the design of rivet joints? A. Rivets are stressed equally B. Stress in plate is maximum at mid-width C. Rivet hole is completely filled by rivet D. Friction between plates is neglected

A

only A

B

A and C only

C

B and D only

D

A, C and D only

Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the shear resistance of 1 rivet along A-A.

A

21.2kN

B

42.4kN

C

84.8kN

D

None of the listed

Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the tensile strength of rivet along A-A.

A

2592kN

B

864kN

C

216kN

D

432kN

Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the crushing resistance of 1 rivet.

A

1153kN

B

108kN

C

96kN

D

576kN

A palindrome is a word that reads the same forwards and backwards. In a game of words, a player has the following two plates painted with letters. From the additional plates given in the options, which one of the combinations of additional plates would allow the player to construct a five-letter palindrome. The player should use all the five plates exactly once. The plates can be rotated in their plane.

A

B

C

D

The plates to be joined with rivet are drilled with holes of a size slightly less than the shank diameter of the rivet.

A

True

B

False

In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, $$l$$ = Span of the spring, n = Number of plates, b = Width of plates and t = Thickness of plates)

A

$$\frac{{{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

B

$$\frac{{3{\text{W}}l}}{{2{\text{nb}}{{\text{t}}^2}}}$$

C

$$\frac{{2{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

D

$$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

Why is the cell of a lead acid battery constructed with multiple number of plates, all the positive plates are joined together and all the negative plates are joined together?

A

To minimise the internal resistance and to reduce the plate size

B

Only for simplicity in construction

C

Only to reduce the plate size

D

Only to minimise the internal resistance

Thickness of the plates to be joined and the type of joint decides the _______ of the rivet needed.

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