An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

A

Decreasing the cross-section area of bar

B

Increasing the cross-section area of bar

C

Remain unaffected with cross-section area

D

Would depend upon other factors

When a bar of length '$$l$$' and diameter 'd' is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)

A

$$\frac{{{\text{w}}l}}{{2{\text{E}}}}$$

B

$$\frac{{{\text{w}}{l^2}}}{{2{\text{E}}}}$$

C

$$\frac{{{\text{w}}{l^3}}}{{2{\text{E}}}}$$

D

$$\frac{{{\text{w}}{l^4}}}{{2{\text{E}}}}$$

Weight of C is twice the weight of M. Weight of M is 1/9 of the weight of R. Weight of R is 5/2 of the weight of K. Weight of K is 1/3 of the weight of G. Who is the second lightest?

A

C

B

M

C

K

D

G

The length of a conical bar is $$l$$, diameter of base is d and weight per unit volume is w. It is fixes at its upper end and hanging freely. The elongation of the bar under the action of its own weight will be

A

$$\frac{{{\text{w}}{l^2}}}{{2{\text{E}}}}$$

B

$$\frac{{{\text{w}}{l^2}}}{{4{\text{E}}}}$$

C

$$\frac{{{\text{w}}{l^2}}}{{6{\text{E}}}}$$

D

$$\frac{{{\text{w}}{l^2}}}{{8{\text{E}}}}$$

Jony weighs twice as much as Suzan's. Suzan's weight is 60% of Sami's weight. Manik's weight is 50% of Lynda's weight. Lynda weight 190% of Jony's weight. Which of these 5 people weight the least?

A

Suzan

B

Manik

C

Lynda

D

Sami

Alam weighs twice as much as much as Marina. Marina's weight is 60% of Robin's weight. Drabir weight 50% of Lima's weight. Lima weight 190% of Alam's weight. Which of these 5 people weight the least?

A

Robin

B

Lima

C

Drabir

D

Marina

Alam weight twice as much as Marina. Marina's weight is 60% of Robin's weight. Drabir weight 50% of Lina's weight. Lina weighs 190% of Alam's weight. Which of these 5 persons weighs the least?

A

Robin

B

Lina

C

Drabir

D

Marina

Jasim's weight is 140% of Masum's weight. Bashir's weight is 90% of Limon's weight. Limon weights twice as much as Masum. What percentage of Jasim's weight is Bashir's weight?

A

6447%

B

7729%

C

12847%

D

15559%

In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed

A

10 mm

B

15 mm

C

20 mm

D

25 mm

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

An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

Related Questions