triad battle

1.    A pantograph is a mechanism with    

• a)    Lower pair

• b)    Higher pair 

• c)    Rolling pair

• d)    Turning pair

2.    In a gear having involute teeth, the normal to the involute is tangent to the

• a) Pitch circle 

• b)    Base circle 

• c)    Addendum circle 

• d)    Dedendum circle

3.__________ mechanism is a crossed four-bar chain mechanism in early steam engines to guide the piston rod in a cylinder to have an approximate straight-line motion.

• a) Chebychev’s

• b) Watt’s

• c) Peaucellier’s

• d) Grasshopper

4.The contact ratio is the ratio of arc of contact to the ____________

• a) module

• b) circular pitch

• c) dedendum

• d) base pitch

5. Bevel gears are equivalent to rolling ________

• a) spheres

• b) cubes

• c) cuboids

• d) cones

6. Identify the screw

• a) Cheese head cap scew

• b) Socket head cap screw

• c) Hexagonal head cap screw

• d) Flat head screw

7. Which one of the following is the definition of ultimate tensile strength (UTS) obtained from a stress-strain test on a metal specimen?

• a) Stress value where stress strain curve transitions from elastic to plastic

• b) The maximum load attained divided by the original cross-sectional area

• c) The maximum load attained divided by the instantaneous cross sectional area

• d) Stress where the specimen fractures

8.The Poisson's ratio for a perfectly incompressible linear elastic material is

• a) 1

• b) 0.5

• c) 0

• d) infinity

9.What is the microstructure of steel called when it consists of alternating layers of ferrite and cementite ?

• a) Austenite

• b) Pearlite

• c) Bainite

• d) Martensite

10.Which of the following microstructures forms when austenite is cooled rapidly to room temperature?

• a)Pearlite

• b)Bainite

• c)Martensite

• d)Ferrite