Three different weights fall from a certain height under vacuum. They will take______________?

Related Mcqs:

1. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately________________?

   A. 0.4 times
   B. 0.6 times
   C. 0.7 times
   D. 0.8 times
   E. 0.9 times the normal diameter of bolt

2. The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be________________?

   A. 28
   B. 8/2
   C. 48
   D. 8/4
   E. none of the above

3. The permissible stress for carbon steel under static loading is generally taken as__________________?

   A. 2000-3000 kg/pm2
   B. 3000-4000 kg/cm2
   C. 4000-4500 kg/cm2
   D. 7500-10,000 kg/cm2
   E. 10,000-15,000 kg/cm2

4. Stress concentration in cyclic loading is____________________?

   Which is correct statement ?
   A. very serious in brittle materials and less serious in ductile materials
   B. very serious in ductile materials and less serious in brittle materials
   C. equally serious in both types of materials
   D. seriousness would depend on other factors
   E. none of the above

5. Maximum principal stress theory is applicable for_____________________?

   A. ductile materials
   B. brittle materials
   C. elastic materials
   D. all of the above
   E. none of the above

6. If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be_________________?

   A. lOVZ
   B. 10VZtol5Vd
   C. 15Vdto20VZ
   D. 20Vdto30Vd
   E. 30V5″to40Vd

7. In order to permit the thermal expansion/contraction of tubing, it should be______________?

   A. crimped
   B. honed
   C. flared
   D. bent
   E. none of the above

8. Oil in journal bearing should be applied at the point where load is________________?

   A. nil or lightest
   B. maximum
   C. average
   D. any one of the above
   E. unpredictable

9. The rated life of a bearing varies___________________?

   A. directly as load
   B. inversely as square of load
   C. inversely as cube of load
   D. inversely as fourth power of load
   E. none of the above

10. A tube has the following advantage over pipe_________________?

    A. lighter and easier to handle
    B. greater shock absorption
    C. smoother inside walls
    D. all of the above
    E. none of the above