**801. Grinding wheels should be tested for balance**

A. only at the time of manufacture

B. before starting the grinding operation

C. at the end of grinding operation

**D. occasionally**

**802. Strain energy is the**

**A. energy stored in a body when strained within elastic limits**

B. energy stored in a body when strained upto the breaking of a specimen

C. maximum strain energy which can be stored in a body

D. proof resilience per unit volume of a material

**803. A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the**

A. axis of load

B. perpendicular to the axis of load

C. maximum moment of inertia

**D. minimum moment of inertia**

**804. The neutral axis of the cross-section a beam is that axis at which the bending stress is**

**A. zero**

B. minimum

C. maximum

D. infinity

**805. Euler’s formula holds good only for**

A. short columns

**B. long columns**

C. both short and long columns

D. weak columns

**806. The object of caulking in a riveted joint is to make the joint**

**A. free from corrosion**

B. stronger in tension

C. free from stresses

D. leak-proof

**807. A steel bar of 5 mm is heated from 15° C to 40° C and it is free to expand. The bar Will induce**

A. no stress

B. shear stress

C. tensile stress

**D. compressive stress**

**808. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be**

**A. 400 MPa**

B. 500 MPa

C. 900 MPa

D. 1400 MPa

**809. The stress induced in a body, when suddenly loaded, is __________ the stress induced when the same load is applied gradually.**

A. equal to

B. one-half

**C. twice**

D. four times

**810. A masonry dam may fail due to**

A. tension in the masonry of the dam and its base

B. overturning of the dam

C. crushing of masonry at the base of the dam

**D. any one of the above**

**NOTE IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG. PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX. THANK YOU**