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# UPPSC Lec’21 ME: Daily Practices Quiz. 15-Dec-2021

Quiz: Mechanical Engineering
Exam: UPPSC AE/Lecturer
Topic: Miscellaneous

Each question carries 3 marks
Negative marking: 1 mark
Time: 8 Minutes

Q1. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if
(a) the floor is smooth, the wall is rough
(b) the floor is rough, the wall is smooth
(c) the floor and wall both are smooth surfaces
(d) the floor and wall both are rough surfaces

Q2. According to Lami’s theorem
(a) three forces acting at a point will be in equilibrium
(b) three forces acting at a point can be represented by a triangle, each side being proportional to force
(c) if three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
(d) if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Q3. Two coplanar couples having equal and opposite moments
(a) balance each other
(b) cannot balance each other.
(c) are equivalent
(d) produce a moment of couple

Q4. On what does the basic static capacity of a ball bearing depends?
(a) Directly proportional to number of balls in a row and diameter of ball
(b) Directly proportional to square of ball diameter and inverse of number of rows of balls
(c) Directly proportional to number of balls in a row and square of diameter of ball
(d) Inversely proportional to square of diameter of ball and directly proportional
to number of balls in a row

Q5. Plug weld joint is used
(a) where longitudinal shear is present
(b) where severe loading is encountered and the upper surfaces of both pieces must be in the same plane
(c) to join two pieces of metal in the same manner as rivet joint metals
(d) there is nothing like plug weld joint

Q6. Type of riveted joint shown in the figure below is__________.

(a) Double riveted lap joint
(b) Double riveted butt joint
L1Difficulty 3
QTags Mechanical
QCereator Paper Maker 10

Solutions

S1. Ans (c)
Sol.

S2. Ans (d)
Sol.

S3. Ans (b)
Sol.

S4. Ans.(c)
Sol.
Stribeck’s equation gives the static load capacity of bearing
C_0=(Kd^2 z)/5,
Where z = number of balls

S5. Ans.(c)
Sol.

Plug weld joint is used to join two pieces of metal in the same manner as riveted joint metals.

S6. Ans.(b)
Sol.

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