**771. For orientation of a plane table with three points A, B and C, Bessel’s drill is**

A. Align b through a and draw a ray towards c, align a through b and draw a ray towards c, finally align c through the point of intersection of the previously drawn rays

B. Align c through a and draw a ray towards b, align a through c and draw a ray towards b, finally align b through the point of intersection of the previously drawn rays

C. Align c through b and draw a ray towards a, align b through c and draw a ray towards a, finally align a, through the point of intersection of the previously, drawn rays**D. In the first two steps any two of the points may be used and a ray drawn towards the third point, which is sighted through the point of intersection of previously drawn rays in the final step.**

**772. To orient a plane table at a point with two inaccessible points, the method generally adopted, is**

A. intersection

B. resection

C. radiation**D. two point problem.**

**773. The altitude of a circumpolar star is maximum when it is**

A.(a) declination must be 0?**B. declination must be 90?**

C. distance from the pole must be less than the latitude of the observer

D. hour angle must be 180?.

**774. At lower culmination, the pole star moves****A. eastward**

B. westward

C. northward

D. southward.

**775. If a is the observed altitude, the refraction correction in seconds, is****A. 58″ cot a**

B. 58″ tan a

C. 58 sin a

D. 58 cos a.

**776. The correction for parallax, is**

A. – 8″.8 cos a

B. + .8″ sin a**C. + 8″.8 cos a**

D. – 8″.8 cos a.

**777. A retarding force on a body does not**

A. change the motion of the body**B. retard the motion of the body**

C. introduce the motion of the body

D. none of these.

**778. The force acting on a point on the surface of a rigid body may be considered to act**

A. at the centre of gravity of the body

B. on the periphery of the body**C. on any point on the line of action of the force**

D. at any point on the surface normal to the line of action of the force.

**779. A number of forces acting simultaneously on a particle of a body**

A. may not be replaced by a single force**B. may be replaced by a single force**

C. may be replaced by a single force through C.G. of the body

D. may be replaced by a couple

**780. Parallelogram Law of Forces states, “if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by**

A. its longer side”

B. its shorter side”

C. the diagonal of the parallelogram which does not pass through the point of intersection of the forces”**D. the diagonal of the parallelogram which passes through the point of intersection of the forces”**

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