Login
Register

Q) Which of the following has poor water resistant property?

  • ANFO
  • Slurry explosives
  • Emulsion explosives
  • NG based explosives

(a) ANFO

Q) The instrument ”Cross-sectioner” used for _____________ measurement.

  • Noise
  • Vibration
  • Illumination
  • Overbreak

(d) Overbreak

Q) The time period of a sinusoidal wave is 0.005 seconds. The frequency of the wave is____ Hz.

  • 20
  • 50
  • 200
  • 500

(c) 200

Q) The surface wave, which produces particle motion both in the vertical direction as well as parallel to its direction of propagation is called___________

  • P – wave
  • S- wave
  • Rayleigh wave
  • Love wave

(c) Rayleigh wave

Q) The body wave, which produces particle motion perpendicular to the direction of propagation, is called____________

  • P – wave
  • S- wave
  • Rayleigh wave
  • Love wave

(b) S- wave

Q) The wave, which produces particle motion only in the same direction of its propagation, is called ____________

  • P – wave
  • S- wave
  • Rayleigh wave
  • Love wave

(a) P – wave

Q) A bullet is fired from a pistol, the unwanted sound generated from that firing, can be categorized under which type of noise?

  • Continuous noise
  • Intermediate noise
  • Repetitive noise
  • Impulsive noise

(d) Impulsive noise

Q) Based on the classification of explosives as per explosives rules, choose the correct combination

Category             Explosives
P- Class 1       1- Nitro compounds
Q- Class 2      2- Chlorate mixture
R- Class 3      3- Nitrate mixture
S– Class 4     4- Gun powder

  • P-1, Q-2, R-4, S-3
  • P-4, Q-2, R-1, S-3
  • P-4, Q-3, R-1, S-2
  • P-1, Q-3, R-4, S-2

(c) P-4, Q-3, R-1, S-2

Q) For a delay blasting of 10 circuits, a sequential timer is set on 25 ms between circuit initiations. If the nominal firing time of a detonator is 400 ms, the last hole will be blasted at _________ ms.

  • 650
  • 400
  • 625
  • 500

(c) 625

Q) Full form of PETN, used in detonating fuse is ___________

  • Pentaetharane tetra nitrate
  • Pentaerythritol trinitrate
  • Pentaerythritol tetra nitrate
  • All of the above

(c) Pentaerythritol tetra nitrate

All Categories

Follow on LinkedIn Follow Now
WhatsApp Group Join Now
Telegram Group Join Now
Scroll to Top