MCQs on Threaded Joints:Basics & Cap Screws
1 - Question
Threaded joints are non-separable joints.
a) True
b) False
View Answer
Answer: b
Explanation: Threaded joints are separable joints of machine parts that are held together by means of a threaded fastening such as nut and bolt
2 - Question
Which type of joints is better when the product is subjected to large vibrations: welded or threaded?
a) Welded
b) Threaded
c) Both have same results
d) Depends on the magnitude of the vibrational force
View Answer
Answer: a
Explanation: Threaded joints loosen when subjected to vibrations.
3 - Question
If a fastener is threaded into a tapped hole, then the fastener is likely to be called as
a) Screw
b) Bolt
c) Washer
d) Screw or bolt
View Answer
Answer: a
Explanation: Bolt is threaded into a nut while screw is threaded into a tapped hole.
4 - Question
In nut and bolt fastener, nut is generally held stationary while bolt is rotated.
In nut and bolt fastener, nut is generally held stationary while bolt is rotated.
View Answer
Answer: b
Explanation: Bolt is always held stationary while nut is rotated.
5 - Question
Which of the following is not a function of washer?
a) Distributes load over a large area of clamped parts
b) Provides bearing surface over large clearance bolts
c) Prevents marring of the bolt head and nut surface
d) Helps in locking of the fastener
View Answer
Answer: d
Explanation: Washer doesn’t help in locking of fasteners.
6 - Question
Shank is the portion of bolt between the head and the thread.
a) True
b) False
View Answer
Answer: a
Explanation: Shank is the portion between head and the thread of the bolt.
7 - Question
If there is no place to accommodate the nut, then one would choose the
a) Through Bolts
b) Tap Bolts
c) Studs
d) None of the mentioned
View Answer
Answer: b
Explanation: Tap bolts are directly threaded into the clamped parts and does not require any nut.
8 - Question
Which of the following are good for parts that are seldom dismantled.
a) Through Bolts
b) Tap Bolts
c) Studs
d) Cannot be stated
View Answer
Answer: b
Explanation: Tap bolts, if removed frequently will leave the threads in the part worn out and hence are used where dismantling is rare.
9 - Question
Which of the following requires more space for the rotation of spanner?
a) Square Head
b) Hexagonal Head
c) Both require equal space of rotation
d) Cannot be stated
View Answer
Answer: a
Explanation: Angle of rotation for hexagonal head is one sixth of a revolution to enable the next pair of flats to be engaged while it is one fourth of a revolution in case of square head.
10 - Question
Fillister, button, flat and hexagonal heads are all tightened externally.
a) True
b) False
View Answer
Answer: b
Explanation: All of these are internal drive screws having a slot for the screw driver of different shape on the head.
11 - Question
Set screws are subjected to tensile forces only.
a) Yes
b) No, they are subjected to compressive forces only
c) Both compressive and tensile
d) Can’t be determined
View Answer
Answer: b
Explanation: Set screws are subjected to compressive forces only.
12 - Question
If the lateral force acting on the set screw is large and tends to displace one part with respect to other than which point is recommended?
a) Dog Point
b) Cone Point
c) Window Point
d) Cut Point
View Answer
Answer: a
Explanation: Dog point is used when the lateral force is large provided the part has sufficient thickness to accommodate a cylindrical hole for dog point