1) Which type of apron is used while doing welding?
Plastic
Leather and worn
Silk
Cotton
Correct answer
Leather and worn
2) Which material is used to make the blowpipe for cutting the materials?
Brass
Copper
Bronze
Aluminum
Correct answer
Brass
3) While gas cutting the nozzle should be .......................................
touching the work
10 mm away from work
2 mm away from work
5 mm away from work
Correct answer
5 mm away from work
4) How to specify the size of an electrode holder?
by its weight
by its shape
by the metal used for making it
by its current carrying capacity
Correct answer
by its current carrying capacity
5) Why acetylene cylinders should always be kept upright/vertical?
To get a uniform rate of flow of gas
To avoid the flow of acetone liquid along with the gas
To save floor space
To help in welding in the vertical position
Correct answer
To avoid the flow of acetone liquid along with the gas
6) If the main electric supply is not available, we can do arc welding with ....................
engine generator set
rectifier set
transformer set
motor generator set
Correct answer
engine generator set
7) What should be done immediately if a cylinder leaks due to a defective valve or safety plug?
Ask others to repair it
Inform to the suppliers
Move it to a safe area
Try to repair it yourself
Correct answer
Move it to a safe area
8) What is the purpose of setting the root gap in a butt joint?
To deposit more metal
To obtain the required depth of fusion
To maintain the alignment
For controlling of distortion
Correct answer
To obtain the required depth of fusion
9) What is the color code used to identify a Carbon dioxide gas cylinder?
Blue body with a white neck
Blue body with a red neck
Black body with a red neck
Black body with a white neck
Correct answer
Black body with a white neck
10) Identify the part marked ‘X’ in the figure?
Acetylene control lever
Oxygen control lever
Safety Lever
Mixing control lever
Correct answer
Oxygen control lever
11) The clearance angle of a drill is between ...........
3° to 5°
8° to 12°
12° to 20°
15° to 20°
Correct answer
8° to 12°
12) A drift is used for ................
removing the drill from the machine spindle
removing a broken drill from the work
drawing a drill location
fixing chuck on the machine spindle
Correct answer
removing the drill from the machine spindle
13) Solid type of tap wrench is ................
not adjustable to take different sizes of taps
the opening of the jaws can be adjusted to take different sizes
used for broken taps
suitable for threading holes in restricted places
Correct answer
not adjustable to take different sizes of taps
14) Adjustable screw plate die is used for ............................
supplying the cutting oil while threading
chasing or reconditioning
increasing or decreasing depth of cut
It is easy to assemble inside the collar
Correct answer
increasing or decreasing depth of cut
15) Tapping is mostly done to produce ...............
internal square thread
internal ‘V’ — thread
external square thread
external ‘V’ — thread
Correct answer
internal ‘V’ — thread
16) The process of bevelling the end of a hole is called ............
countersinking
spot facing
counterboring
reaming
Correct answer
countersinking
17) The process of enlarging at the end of a hole for accommodating the socket screw head is called ............
counterboring
reaming
countersinking
spot facing
Correct answer
counterboring
18) Vernier height gauge is used for marking ............
pitch dimensions
external dimensions
internal dimensions
machined dimensions
Correct answer
external dimensions
19) While drilling, the drill gets overheated this is due to ..............
excessive cutting pressure
the material being drilled is ductile
more lip clearance angle
less cutting angle
Correct answer
excessive cutting pressure
20) The surface of the hole drilled is rough. It is due to ...........
the drill is not held rigidly
worn-out spindle bearing
blunt cutting edge
unequal lip length
Correct answer
blunt cutting edge
21) Which one of the following thread has got the highest depth?
Buttress
Worm
Acme
Square
Correct answer
Buttress
22) The damaged external threads are rectified by
adjustable screw plate die
half die
circular die
die nut
Correct answer
die nut
23) The angle of BSW ‘V’ form thread is ........
60°
55°
47.5°
45°
Correct answer
55°
24) Which form of threads are used in the places where the sliding forces act in one direction?
Vee thread
Square thread
Trapezoidal thread
Saw-tooth thread
Correct answer
Saw-tooth thread
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