**781. The resultant of two forces P and Q acting at an angle 0, is**

A. P2 + Q2 + 2P sin 0

B. P2 + Q2 + 2PQ cos 0

C. P2 + Q2 + 2PQ tan 0**D.P2+ Q2 + 2PQ cos 0**

**782. If the resultant of two forces P and Q acting at an angle 0 makes an angle a with P, then tan a equals P sin 0 Q sin 0**

A. P – Q cos 0

B. P + Q cos 0 P sin 0

C. Q sin 0**D. P + Q tan 0 Q+Psin 0**

**783. If two equal forces of magnitude P act at an angle 0, their resultant, will be**

A. P cos 0/2**B. 2P in 0/2**

C. P tan 0/2

D. 2P cos 0/2

**784. To orient a plane table at a point P roughly south of the mid-point of two inaccessible conical hill stations A and B in the plains, a point C is selected in line with AB and table is oriented at C by bringing ab in line with AB. A ray is then drawn towards P and at P the table is oriented by back ray method. The orientation so obtained, is**

A. unique and correct

B. incorrect**C. manifold and correct**

D. not reliable.

**785. Orientation of a plane table by solving two point problem is only adopted when**

A. saving of time is a main factor

B. better accuracy is a main factor**C. given points are inaccessible**

D. none of these.

**786. Accuracy of ‘fix’ by two point problem, is**

A. bad

B. good**C. not reliable**

D. unique.

**787. While working on a plane table, the correct rule is:**

A. Draw continuous lines from all instrument stations**B. Draw short rays sufficient to contain the points sought**

C. Intersection should be obtained by actually drawing second rays

D. Take maximum number of sights as possible from each station to distant objects.

**788. If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for****A. horizontal sights**

B. inclined sights upward

C. inclined sight downward

D. none of these.

**789. The smaller horizontal angle between the true meridian and a survey line, is known**

A. declination

B. bearing**C. azimuth**

D. dip.

**790. The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known**

A. declination

B. azimuth**C. dip**

D. bearing.

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