Practice Pakistan's most useful MCQs for competitive exams

The number of neutrons in the nucleus of Uranium-233 (92U233) is _________________?

• (A)  141
• (B)  92
• (C)  233
• (D)  325

Answer

Submitted By :Ali Uppal

Mass of a positron is same as that of a/an__________________?

• (A)  Electron
• (B)  α-particle
• (C)  Proton
• (D)  Neutron

Answer

Submitted By :Ali Uppal

The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be ______________ of its original weight?

• (A)  1/2
• (B)  1/4
• (C)  1/8
• (D)  1/16

Answer

Submitted By :Ali Uppal

An element having large number of ______________ is most easily subjected to nuclear fission?

• (A)  Protons
• (B)  Electrons
• (C)  Neutrons
• (D)  Nucleons

Answer

Submitted By :Ali Uppal

One ‘amu’ is equivalent to___________________?

• (A)  9.31 MeV
• (B)  931 eV
• (C)  931 Mev
• (D)  931 J

Answer

Submitted By :Ali Uppal

75% of a radioactive element decays in 6 hours. Its half life period is ______________ hours?

• (A)  3/4
• (B)  1/6
• (C)  3
• (D)  4

Answer

Submitted By :Ali Uppal

Which of the following is not used as a nuclear fuel cladding material ?

• (A)  Zircaloy
• (B)  Cadmium
• (C)  Ceramics
• (D)  Stainless steel

Answer

Submitted By :Ali Uppal

The radioisotope used to study the thyroid gland is__________________?

• (A)  Iodine
• (B)  Cobalt
• (C)  Iron
• (D)  Carbon

Answer

Submitted By :Ali Uppal

Sodium melts (at atmospheric pressure) at a temperature of ____________ °C?

• (A)  58
• (B)  98
• (C)  348
• (D)  588

Answer

Submitted By :Ali Uppal

A thermal nuclear reactor compared to a fast breeder reactor ?

• (A)  Uses slower neutrons for fission
• (B)  Uses faster neutrons for fission
• (C)  Gives higher power density
• (D)  Requires less fuel to run at the same power level

Answer

Submitted By :Ali Uppal