Machine Design Engineering Quiz Questions Test2

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Test your caliber

1. The function of cutting oil when threading a pipe is to ______.
provide cooling action	lubricate the dies
help remove chips	all of the above

2. Silver-based solder is used for _____.
flaring	brazing
soft soldering	fusion welding

3. For tight leakage joints, following type of thread is best suited _____.
metric	buttress
square	NPT (national pipe threads)

4. In order to permit the thermal expansion/contraction of tubing, it should be ______.
crimped	honed
flared	bent

5. A tube has the following advantage over pipe ______.
lighter and easier to handle	greater shock absorption
smoother inside walls	all of the above

6. The strap end of a connecting rod of steam engine is joined by ____.
gib of cotter joint	sleeve and cotter joint
spigot socket cotter joint	knuckle joint

7. A backing ring is used inside the pipe joint when making a _____.
butt weld	fillet weld
sleeve weld	socket weld

8. The shear plane in case of bolts should _____.
be across threaded portion of shank	be parallel to axis of bolt
be normal to threaded portion of shank	never be across the threaded portion

9. Castle nut is a locking device in which ________.
one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming	a slot is cut partly is middle of nut and then slot reduced by tightening a screw
a hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip	through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

10. When a nut is tightened by plapjng a washer below it, the bolt will be subjected to following type of loads
compression	tension
shear	combined loads

11. Gear box is used ______.
to produce torque	for speed reduction
to obtain variable speeds	to increase efficiency of system

12. The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for _____.
reducing stress concentration	ease of manufacture
safety	fullering and caulking

13. The piston rod of a steam engine is usually connected to the crosshead by means of _____.
bolted joint	kunckle joint
cotter joint	universal joint

14. Which of the following pipe joints would be suitable for pipes carrying steam
flanged	threaded
bell and spigot	expansion

15. Spring index is ______.
ratio of coil diameter to wire diameter	load required to produce unit deflection
its capability of storing energy	indication of quality of spring

16. The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is ______.
larger	smaller
equal	larger/smaller depending on diameter of spring coil

17. Form coefficient of spring is _____.
ratio of coil diameter to wire diameter	load required to produce unit deflection
its capability of storing energy	concerned With strength of wire of spring

18. Spring stiffness is ______.
ratio of coil diameter to wire diameter	load required to produce unit deflection
its capability of storing energy	its ability to absorb shocks

19. When two springs are in series (having stiffness K), the equivalent stiffness will be _____.
K	K/2
2K	KIA

20. When a close coiled helical spring is compressed, its wire is subjected to _____.
tension	shear
compression	all of the above