weldingwelder welding (weldingwelder.blogspot.com)
1)For ultrasonic welding, thickness of metal is usually restricted to:
A) 3 mm B) 9 mm
C) 12 mm D) 15 mm
2)The welding position in which an electro slag welding operation is performed is?
A) Flat B) Horizontal
C) Vertical D) Overhead
3 What is the function of a gas regulator during a gas welding operation?
A) get the different type of flames
B) Mix the gas in required proportion
C) Change the volume of gases flowing to the blow pipe
D) Set the working pressure
4 Metal active gas arc welding uses which of following gas?
A) Carbon dioxide B) Nitrogen
C) Argon D) Helium
5 In DC welding, straight polarity is recommended for which of following case?
A) Welding with heavy coated electrodes
B) Welding with light coated electrodes
C) Sheet metal working
D) Welding with super heavy coated electrodes
6 Among the following, which of the following deposits a large amount of weld metal per unit time?
A) Low hydrogen electrode
B) Heavy coated electrode
C) Iron powder electrode
D) Deep penetration electrode
7 Arc length in an arc welding process should be nearly equal to:
A) diameter of electrode (d)
B) 1.5d
C) 2d
D) 3d
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8 Which of the following property of cast iron makes it difficult to be welded?
A) Low melting point
B) Low fluidity
C) Its hardness and brittleness
D) High compressive strength
9 The selection of nozzle for pipe welding depends upon:
A) Groove angle
B) Pipe wall thickness
C) Pipe diameter
D) All of the above
10 Soldering iron is made of copper due to which following reason?
A) It is heavy
B) Bad conductor of heat
C) Thermal expansion is more
D) Good conductor of heat
11 A collimated light beam is used for producing heat in:
A) TIG welding
B) MIG welding
C) Percussion welding
D) Laser welding
12 Which of the following is used for eliminating the fire caught due to electricity?
A) Using oil
B) Conductive agent fire extinguisher
C) CO2 fire extinguisher
D) All of these
13 The presence of which gas in the weld metal has harmful effect leading to crack?
A) Oxygen B) Hydrogen
C) Nitrogen D) None of these
14 The word ‘LASER’ is an acronym for which of the following?
A) Light Amplification by Stimulated Emission of Radiation
B) Light Augmentation by Stimulated Emission of Radiation
C) Light Augmentation by Sustained Emission of Radiation
D) Light Amplification by Sustained Emission of Radiation
15 Sugar at Rs.15 per kg is mixed with sugar at Rs.20 per kg in the ration 2 : 3. Find the price
per kg of the mixture:
A) Rs 21 B) Rs 17
C) Rs 18 D) Rs 19
16 If five items are bought for Rs.345, Rs.375, Rs.225, Rs.255 and Rs.300. then the average
price of the item is?
A) 340 B) 350
C) 280 D) 300
17 A man goes to Mumbai from Allahabad at a speed of 40km/h and returns with the speed of
60km/h. What is his average speed during the whole journey?
A) 50 km/h B) 48 km/h
C) 45 km/h D) 52 km/h
18 If √15 = 3.8729, evaluate (√5+√3)/(√5−√3)
A) 4.7289 B) 6.8729
C) 7.8729 D) 8.8729
19 Mohan can finish a job in 60 days whereas Ram can finish the same job in 20 days. If they work
together the job will be over in?
A) 15 days
B) 30 days
C) 80 days
D) 40 day
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20 A train 140m long running at 60kmph. In how much time will it pass a platform 260m long?
A) 44 sec B) 24 sec
C) 36 sec D) 58 sec
21 If cosθ=−3/5 then find tanθ, where θ is an angle in the second quadrant:
A) -4/3 B) -4/5
C) 4/3 D) 3/5
22 The length of the longest pole that can be placed
in a hall of dimensions 10 m x 8 m x 6 m, is:
A) 9 m B) 8√2 m
C) 10√2 m D) 11 m
23 What is the value of (sin150+cos150)2+(sin150-cos150)2 ?
A) 1 B) 2
C) 0 D) -1
24 If the surface area of cube is 486 cm2, then its volume in cm3 will be?
A) 729 B) 625
C) 743 D) 216
25 Three cubes whose edges are 8 cm, 6 cm and 1
cm respectively are melted without any loss of
metal into a single cube. What is the edge of cube?
A) 10 cm B) 9 cm
C) 7 cm D) 8 cm