or Search

Q:

In nuclear reactor,Chain reaction is controlled by introducing

A) cadmium rod	B) iron rod
C) platinum rod	D) graphite rod

Answer & Explanation Answer: A) cadmium rod

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

Q:

In atomic reactors,graphite is used as

A) lubricant	B) fuel
C) linear of the ractor	D) moderator

Answer & Explanation Answer: D) moderator

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

Q:

At 3.40, the hour hand and the minute hand of a clock form an angle of:

A) 110	B) 120
C) 130	D) 140

Answer & Explanation Answer: C) 130

Explanation:

Angle traced by hour hand in 12 hrs. = 360º.

Angle traced by it in $\frac{11}{3}$ hrs = ${(\frac{360}{12} \times \frac{11}{3})}^{0}$ = $110^{0}$

Angle traced by minute hand in 60 min. = $360^{0}$

Angle traced by it in 40 min = ${(\frac{360}{60} \times 40)}^{0}$ = $240^{0}$

$\therefore$ Required angle (240 - 110)º = $130^{0}$

Report Error

View Answer Report Error Discuss

Filed Under: Clocks
Exam Prep: Bank Exams
Job Role: Bank PO

Q:

In nuclear reactor the speed of neutrons is slowed down by

A) heavy water	B) ordinary water
C) Zinc rods	D) molten caustic soda

Answer & Explanation Answer: A) heavy water

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

Q:

The first indication that a stable nucleus can be broken down was afforded by

A) Rutherford	B) Madam Curie
C) Soddy	D) Schmidt

Answer & Explanation Answer: A) Rutherford

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

Q:

Who present the theory of radioactive disintegration

A) Rutherford and Soddy	B) Soddy and Fajan
C) Thomson and Rutherford	D) Hahn and strassman

Answer & Explanation Answer: A) Rutherford and Soddy

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

Q:

A device used for the measurement of radioactivity is

A) mass spectrometer	B) cyclotron
C) nuclear reactor	D) G.M.counter

Answer & Explanation Answer: D) G.M.counter

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

Q:

There is a family of six persons A, B, C, D, E and F. They are Lawyer, Doctor, Teacher, Salesman, Engineer and Accountant There are two married couples in the family. D, the Salesman is married to the Lady Teacher. The Doctor is married to the Lawyer. F, the Accountant is the son of B and brother of E. C, the Lawyer is the daughter-in-law of A. E is the unmarried Engineer. A is the grandmother of F. What is the profession of B ?

A) Teacher	B) Doctor
C) Lawyer	D) None of these

Answer & Explanation Answer: B) Doctor

Explanation:

C is the daughter-in-law of A who is the grandmother of F means C is the mother of F But F is the son of B.

So, B is C's husband. But C, the lawyer is married to the Doctor So, B is the Doctor. F, the Accountant, will be the son of B and C, E is the unmarried Engineer.

So, the other named couple can be that of grandmother of F. i.e, A and D But D, the Salesman, is married to the Lady Teacher. So, D, the Salesman, is the grandfather of F, father of B and the husband of A, the Lady Teacher.

Clearly, B is the Doctor.

Report Error

View Answer Report Error Discuss

Filed Under: Blood Relations

Searching for "or"

Quick Links